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List of file signatures
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<p>A <a href="/facts/File_format/qrXbwJaH">file signature</a> is data used to identify or verify the content of a file. Such signatures are also known as <i><a href="/facts/Magic_number_(programming)/Xg7mVI7V">magic numbers</a></i> or <i>magic bytes</i> and are usually appended at the beginning of the file. </p><p>Many <a href="/facts/File_format/qrXbwJaH">file formats</a> are not intended to be read as text. If such a file is accidentally viewed as a text file, its contents will be unintelligible. However, some file signatures can be recognizable when interpreted as text. In the table below, the column "ISO 8859-1" shows how the file signature appears when interpreted as text in the common <a href="/facts/ISO_8859-1/xPNVSEE6">ISO 8859-1</a> encoding, with unprintable characters represented as the <a href="/facts/Control_code/jkWgHvfC">control code</a> abbreviation or symbol, or <a href="/facts/Windows-1252/eyM337y0">codepage 1252</a> character where available, or a box otherwise. In some cases the space character is shown as ␠. </p> <table><tbody><tr><th><a href="/facts/Hexadecimal/02ohQW22">Hex</a> signature</th><th>ISO 8859-1</th><th><a href="/facts/Offset_(computer_science)/Qv0N3nND">Offset</a></th><th><a href="/facts/Filename_extension/cJgfAym4">Extension</a></th><th>Description</th></tr><tr><td>23 21</td><td>#!</td><td>0</td><td></td><td>Script or data to be passed to the program following the <a href="/facts/Shebang_(Unix)/brtu1F1o">shebang</a> (#!)</td></tr><tr><td>02 00 5a 57 52 54 00 00 00 00 00 00 00 00 00 00</td><td>␂␀ZWRT␀␀␀␀␀␀␀␀␀␀</td><td>0</td><td>cwk</td><td>Claris Works word processing doc</td></tr><tr><td>00 00 02 00 06 04 06 00 08 00 00 00 00 00</td><td>␀␀␂␀␆␄␆␀␈␀␀␀␀␀</td><td>0</td><td>wk1</td><td>Lotus 1-2-3 spreadsheet (v1) file</td></tr><tr><td>00 00 1A 00 00 10 04 00 00 00 00 00</td><td>␀␀␚␀␀␊␄␀␀␀␀␀</td><td>0</td><td>wk3</td><td>Lotus 1-2-3 spreadsheet (v3) file</td></tr><tr><td>00 00 1A 00 02 10 04 00 00 00 00 00</td><td>␀␀␚␀␂␊␄␀␀␀␀␀</td><td>0</td><td>wk4wk5</td><td>Lotus 1-2-3 spreadsheet (v4, v5) file</td></tr><tr><td>00 00 1A 00 05 10 04</td><td>␀␀␚␀␅␊␄</td><td>0</td><td>123</td><td>Lotus 1-2-3 spreadsheet (v9) file</td></tr><tr><td>00 00 03 F3</td><td>␀␀␃ó</td><td>0</td><td></td><td>Amiga Hunk executable file</td></tr><tr><td>00 00 49 49 58 50 52 (<a href="/facts/Endianness/wbrQnyu3">little-endian</a>)00 00 4D 4D 58 50 52 (<a href="/facts/Endianness/wbrQnyu3">big-endian</a>)</td><td>␀␀IIXPR␀␀MMXPR</td><td>0</td><td>qxd</td><td>Quark Express document</td></tr><tr><td>50 57 53 33</td><td>PWS3</td><td>0</td><td>psafe3</td><td>Password Gorilla Password Database</td></tr><tr><td>D4 C3 B2 A1 (<a href="/facts/Endianness/wbrQnyu3">little-endian</a>)</td><td>Ôò¡</td><td rowspan="2">0</td><td rowspan="2">pcap</td><td rowspan="2">Libpcap File Format</td></tr><tr><td>A1 B2 C3 D4 (<a href="/facts/Endianness/wbrQnyu3">big-endian</a>)</td><td>¡²ÃÔ</td></tr><tr><td>4D 3C B2 A1 (little-endian)</td><td>M<²¡</td><td rowspan="2">0</td><td rowspan="2">pcap</td><td rowspan="2">Libpcap File Format (nanosecond-resolution)</td></tr><tr><td>A1 B2 3C 4D (big-endian)</td><td>¡²<M</td></tr><tr><td>0A 0D 0D 0A</td><td>␊␍␍␊</td><td>0</td><td>pcapng</td><td>PCAP Next Generation Dump File Format</td></tr><tr><td>ED AB EE DB</td><td>í«îÛ</td><td>0</td><td>rpm</td><td>RedHat Package Manager (RPM) package</td></tr><tr><td>53 51 4C 69 74 65 20 66 6F 72 6D 61 74 20 33 00</td><td>SQLite format 3␀</td><td>0</td><td>sqlitedbsqlitedb</td><td>SQLite Database</td></tr><tr><td>53 50 30 31</td><td>SP01</td><td>0</td><td>bin</td><td>Amazon Kindle Update Package</td></tr><tr><td>49 57 41 44</td><td>IWAD</td><td>0</td><td>wad</td><td>internal WAD (main resource file of <a href="/facts/Doom_(franchise)/fkA6GKgJ">Doom</a>)</td></tr><tr><td>00</td><td>␀</td><td>0</td><td>PICPIFSEAYTR</td><td>IBM Storyboard bitmap fileWindows <a href="/facts/Program_information_file/cRp3lECJ">Program Information File</a>Mac <a href="/facts/StuffIt/MEIyJKJ8">Stuffit</a> Self-Extracting ArchiveIRIS <a href="/facts/Optical_character_recognition/kdTyxa1l">OCR</a> data file</td></tr><tr><td>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00</td><td>␀␀␀␀␀␀␀␀ ␀␀␀␀␀␀␀␀ ␀␀␀␀␀␀␀␀</td><td>11</td><td>PDB</td><td><a href="/facts/PalmPilot/n5AGqxGA">PalmPilot</a> Database/Document File</td></tr><tr><td>BE BA FE CA</td><td>¾ºþÊ</td><td>0</td><td>DBA</td><td><a href="/facts/Palm_(PDA)/n5AGqxGA">Palm</a> Desktop Calendar Archive</td></tr><tr><td>00 01 42 44</td><td>␀␁BD</td><td>0</td><td>DBA</td><td>Palm Desktop To Do Archive</td></tr><tr><td>00 01 44 54</td><td>␀␁DT</td><td>0</td><td>TDA</td><td>Palm Desktop Calendar Archive</td></tr><tr><td>54 44 46 24</td><td>TDF$</td><td>0</td><td>TDF$</td><td>Telegram Desktop File</td></tr><tr><td>54 44 45 46</td><td>TDEF</td><td>0</td><td>TDEF</td><td>Telegram Desktop Encrypted File</td></tr><tr><td>00 01 00 00</td><td>␀␁␀␀</td><td>0</td><td></td><td>Palm Desktop Data File (<a href="/facts/Microsoft_Access/1tID4rKM">Access</a> format)</td></tr><tr><td>00 00 01 00</td><td>␀␀␁␀</td><td>0</td><td>ico</td><td><a href="/facts/Computer_icon/habCR8KJ">Computer icon</a> encoded in <a href="/facts/ICO_(file_format)/TR0B7fYH">ICO file format</a></td></tr><tr><td>69 63 6e 73</td><td>icns</td><td>0</td><td>icns</td><td><a href="/facts/Apple_Icon_Image_format/Bmsgynkg">Apple Icon Image format</a></td></tr><tr><td>66 74 79 70 33 67</td><td>ftyp3g</td><td>4</td><td>3gp3g2</td><td>3rd Generation Partnership Project <a href="/facts/3GPP/TBrQYKFF">3GPP</a> and <a href="/facts/3GPP2/6bNoq0n6">3GPP2</a> multimedia files</td></tr><tr><td>66 74 79 70 68 65 69 6366 74 79 70 6d</td><td>ftypheic</td><td>4</td><td>heic</td><td>High Efficiency Image Container (HEIC)</td></tr><tr><td>1F 9D</td><td>␟□</td><td>0</td><td>ztar.z</td><td>compressed file (often <a href="/facts/Tar_(file_format)/DCJ37j3d">tar</a> zip) using <a href="/facts/Lempel-Ziv-Welch/hJfgYm9j">Lempel-Ziv-Welch</a> algorithm</td></tr><tr><td>1F A0</td><td>␟⍽</td><td>0</td><td>ztar.z</td><td>Compressed file (often tar zip) using <a href="/facts/LHA_(file_format)/e7r4UwDo">LZH</a> algorithm</td></tr><tr><td>2D 6C 68 30 2D</td><td>-lh0-</td><td>2</td><td>lzh</td><td><a href="/facts/LHA_(file_format)/e7r4UwDo">Lempel Ziv Huffman archive file</a> Method 0 (No compression)</td></tr><tr><td>2D 6C 68 35 2D</td><td>-lh5-</td><td>2</td><td>lzh</td><td><a href="/facts/LHA_(file_format)/e7r4UwDo">Lempel Ziv Huffman archive file</a> Method 5 (8 KiB sliding window)</td></tr><tr><td>42 41 43 4B 4D 49 4B 45 44 49 53 4B</td><td>BACKMIKEDISK</td><td>0</td><td>bac</td><td>AmiBack <a href="/facts/Amiga/60B3A9of">Amiga</a> <a href="/facts/Backup/ldV72CkU">Backup</a> data file</td></tr><tr><td>49 4E 44 58</td><td>INDX</td><td>0</td><td>idx</td><td>AmiBack <a href="/facts/Amiga/60B3A9of">Amiga</a> <a href="/facts/Backup/ldV72CkU">Backup</a> index file</td></tr><tr><td>62 70 6C 69 73 74</td><td>bplist</td><td>0</td><td>plist</td><td>Binary <a href="/facts/Property_List/tlRqjIvP">Property List</a> file</td></tr><tr><td>42 5A 68</td><td>BZh</td><td>0</td><td>bz2</td><td>Compressed file using <a href="/facts/Bzip2/waffQ2m0">Bzip2</a> algorithm</td></tr><tr><td>47 49 46 38 37 6147 49 46 38 39 61</td><td>GIF87aGIF89a</td><td>0</td><td>gif</td><td>Image file encoded in the <a href="/facts/Graphics_Interchange_Format/HfIBWrIC">Graphics Interchange Format</a> (GIF)</td></tr><tr><td>49 49 2A 00 (little-endian)</td><td>II*␀</td><td rowspan="2">0</td><td rowspan="2">tiftiff</td><td rowspan="2"><a href="/facts/Tagged_Image_File_Format/TjBJcLeT">Tagged Image File Format</a> (TIFF)</td></tr><tr><td>4D 4D 00 2A (big-endian)</td><td>MM␀*</td></tr><tr><td>49 49 2B 00 (little-endian)</td><td>II+␀</td><td>0</td><td rowspan="2">tif<p>tiff</p></td><td rowspan="2">BigTIFF</td></tr><tr><td>4D 4D 00 2B (big-endian)</td><td>MM␀+</td><td>0</td></tr><tr><td>49 49 2A 00 10 00 00 00 43 52</td><td>II*␀␐␀␀␀CR</td><td>0</td><td>cr2</td><td>Canon RAW Format Version 2Canon's RAW format is based on TIFF.</td></tr><tr><td>66 74 79 70 63 72 78 43 52</td><td>ftypcrx</td><td>0</td><td>cr3</td></tr><tr><td>80 2A 5F D7</td><td>€*_×</td><td>0</td><td>cin</td><td><a href="/facts/Eastman_Kodak/zMnK74Cp">Kodak</a> <a href="/facts/Cineon/9E0uSeNn">Cineon image</a></td></tr><tr><td>52 4E 43 0152 4E 43 02</td><td>RNC␁RNC␂</td><td>0</td><td></td><td>Compressed file using Rob Northen Compression (version 1 and 2) algorithm</td></tr><tr><td>4E 55 52 55 49 4D 474E 55 52 55 50 41 4C</td><td>NURUIMGNURUPAL</td><td>0</td><td>nuinup</td><td>nuru ASCII/ANSI image and palette files</td></tr><tr><td>53 44 50 58 (<a href="/facts/Endianness/wbrQnyu3">big-endian</a> format)</td><td>SDPX</td><td rowspan="2">0</td><td rowspan="2">dpx</td><td rowspan="2"><a href="/facts/SMPTE/84NgELfP">SMPTE</a> <a href="/facts/Digital_Picture_Exchange/oIAA1bux">DPX image</a></td></tr><tr><td>58 50 44 53 (<a href="/facts/Endianness/wbrQnyu3">little-endian</a> format)</td><td>XPDS</td></tr><tr><td>76 2F 31 01</td><td>v/1␁</td><td>0</td><td>exr</td><td><a href="/facts/OpenEXR/Qrr9TgYb">OpenEXR image</a></td></tr><tr><td>42 50 47 FB</td><td>BPGû</td><td>0</td><td>bpg</td><td><a href="/facts/Better_Portable_Graphics/9E68RA50">Better Portable Graphics</a> format</td></tr><tr><td>FF D8 FF DB</td><td>ÿØÿÛ</td><td rowspan="4">0</td><td rowspan="4">jpgjpeg</td><td rowspan="4"><a href="/facts/JPEG/HQ8QS3uB">JPEG</a> raw or in the <a href="/facts/JFIF/fxl3q2CE">JFIF</a> or <a href="/facts/Exif/KHFgGnk6">Exif</a> file format</td></tr><tr><td>FF D8 FF E0 00 10 4A 46 49 46 00 01</td><td>ÿØÿà␀␐JFIF␀␁</td></tr><tr><td>FF D8 FF EE</td><td>ÿØÿî</td></tr><tr><td>FF D8 FF E1 ?? ?? 45 78 69 66 00 00</td><td>ÿØÿá??Exif␀␀</td></tr><tr><td>FF D8 FF E0</td><td>ÿØÿà</td><td>0</td><td>jpg</td><td><a href="/facts/JPEG/HQ8QS3uB">JPEG</a> raw or in the <a href="/facts/JFIF/fxl3q2CE">JFIF</a> or <a href="/facts/Exif/KHFgGnk6">Exif</a> file format</td></tr><tr><td>00 00 00 0C 6A 50 20 20 0D 0A 87 0A</td><td>␀␀␀␌jP␠␠␍␊‡␊</td><td rowspan="2">0</td><td rowspan="2">jp2j2kjpfjpmjpg2j2cjpcjpxmj2</td><td rowspan="2"><a href="/facts/JPEG_2000/GAzXdHI2">JPEG 2000</a> format</td></tr><tr><td>FF 4F FF 51</td><td>ÿOÿQ</td></tr><tr><td>71 6f 69 66</td><td>qoif</td><td>0</td><td>qoi</td><td><a href="/facts/QOI_(image_format)/fvQV7bWm">QOI</a> - The “Quite OK Image Format”</td></tr><tr><td>46 4F 52 4D ?? ?? ?? ?? 49 4C 42 4D</td><td>FORM????ILBM</td><td>0any</td><td>ilbmlbmibmiff</td><td><a href="/facts/Interchange_File_Format/tuwp8bH7">IFF</a> <a href="/facts/ILBM/S6tgTMPE">Interleaved Bitmap Image</a></td></tr><tr><td>46 4F 52 4D ?? ?? ?? ?? 38 53 56 58</td><td>FORM????8SVX</td><td>0any</td><td>8svx8svsvxsndiff</td><td><a href="/facts/Interchange_File_Format/tuwp8bH7">IFF</a> <a href="/facts/8SVX/C8jgUjEq">8-Bit Sampled Voice</a></td></tr><tr><td>46 4F 52 4D ?? ?? ?? ?? 41 43 42 4D</td><td>FORM????ACBM</td><td>0any</td><td>acbmiff</td><td>Amiga Contiguous Bitmap</td></tr><tr><td>46 4F 52 4D ?? ?? ?? ?? 41 4E 42 4D</td><td>FORM????ANBM</td><td>0any</td><td>anbmiff</td><td><a href="/facts/Interchange_File_Format/tuwp8bH7">IFF</a> Animated Bitmap</td></tr><tr><td>46 4F 52 4D ?? ?? ?? ?? 41 4E 49 4D</td><td>FORM????ANIM</td><td>0any</td><td>animiff</td><td><a href="/facts/Interchange_File_Format/tuwp8bH7">IFF</a> CEL Animation</td></tr><tr><td>46 4F 52 4D ?? ?? ?? ?? 46 41 58 58</td><td>FORM????FAXX</td><td>0any</td><td>faxxfaxiff</td><td><a href="/facts/Interchange_File_Format/tuwp8bH7">IFF</a> <a href="/facts/Fax/EBvf1cHA">Facsimile Image</a></td></tr><tr><td>46 4F 52 4D ?? ?? ?? ?? 46 54 58 54</td><td>FORM????FTXT</td><td>0any</td><td>ftxtiff</td><td><a href="/facts/Interchange_File_Format/tuwp8bH7">IFF</a> <a href="/facts/Formatted_text/39S6HPWI">Formatted Text</a></td></tr><tr><td>46 4F 52 4D ?? ?? ?? ?? 53 4D 55 53</td><td>FORM????SMUS</td><td>0any</td><td>smussmumusiff</td><td><a href="/facts/Interchange_File_Format/tuwp8bH7">IFF</a> Simple Musical Score</td></tr><tr><td>46 4F 52 4D ?? ?? ?? ?? 43 4D 55 53</td><td>FORM????CMUS</td><td>0any</td><td>cmusmusiff</td><td><a href="/facts/Interchange_File_Format/tuwp8bH7">IFF</a> Musical Score</td></tr><tr><td>46 4F 52 4D ?? ?? ?? ?? 59 55 56 4E</td><td>FORM????YUVN</td><td>0any</td><td>yuvnyuviff</td><td><a href="/facts/Interchange_File_Format/tuwp8bH7">IFF</a> <a href="/facts/YUV/w8hA6xnh">YUV Image</a></td></tr><tr><td>46 4F 52 4D ?? ?? ?? ?? 46 41 4E 54</td><td>FORM????FANT</td><td>0any</td><td>iff</td><td><a href="/facts/Amiga/60B3A9of">Amiga</a> <a href="/facts/Fantavision/x5JkFQ3f">Fantavision Movie</a></td></tr><tr><td>46 4F 52 4D ?? ?? ?? ?? 41 49 46 46</td><td>FORM????AIFF</td><td>0any</td><td>aiffaifaifcsndiff</td><td><a href="/facts/Audio_Interchange_File_Format/zNjxHR1C">Audio Interchange File Format</a></td></tr><tr><td>4C 5A 49 50</td><td>LZIP</td><td>0</td><td>lz</td><td><a href="/facts/Lzip/nBIgH6hH">lzip</a> compressed file</td></tr><tr><td>30 37 30 37 30 37</td><td>070707</td><td>0</td><td>cpio</td><td><a href="/facts/Cpio/ylj9ArS3">cpio</a> archive file</td></tr><tr><td>4D 5A</td><td>MZ</td><td>0</td><td>exedllmuisysscrcplocxaxiecimerstspfonefi</td><td><a href="/facts/DOS_MZ_executable/W8vGH66t">DOS MZ executable</a> and its descendants (including <a href="/facts/New_Executable/Nx8WJPff">NE</a> and <a href="/facts/Portable_Executable/pJy7AkuY">PE</a>)</td></tr><tr><td>53 4D 53 4E 46 32 30 30</td><td>SMSNF200</td><td>0</td><td>ssp</td><td>SmartSniff Packets File </td></tr><tr><td>5A 4D</td><td>ZM</td><td>0</td><td>exe</td><td><a href="/facts/DOS_ZM_executable/W8vGH66t">DOS ZM executable</a> and its descendants (rare)</td></tr><tr><td>50 4B 03 0450 4B 05 06 (empty archive)50 4B 07 08 (spanned archive)</td><td>PK␃␄PK␅␆PK␇␈</td><td>0</td><td>zipaarapkdocxepub<a href="/facts/.ipa/ayVhTL7o">ipa</a>jarkmz<a href="/facts/Mozilla_Archive_Format/zWkf6aeh">maff</a>msixodpodsodtpk3pk4pptxusdzvsdxxlsx<a href="/facts/XPInstall/74qRz0W1">xpi</a><p>whl</p></td><td><a href="/facts/ZIP_(file_format)/qDrrYIB9">zip file format</a> and formats based on it, such as <a href="/facts/EPUB/5K41t91V">EPUB</a>, <a href="/facts/JAR_(file_format)/LcIBCWXT">JAR</a>, <a href="/facts/OpenDocument/pMtcVuNr">ODF</a>, <a href="/facts/Office_Open_XML/294uNJrf">OOXML</a></td></tr><tr><td>52 61 72 21 1A 07 00</td><td>Rar!␚␇␀</td><td>0</td><td>rar</td><td><a href="/facts/RAR_(file_format)/cgHI6gnw">Roshal ARchive</a> compressed archive v1.50 onwards</td></tr><tr><td>52 61 72 21 1A 07 01 00</td><td>Rar!␚␇␁␀</td><td>0</td><td>rar</td><td><a href="/facts/RAR_(file_format)/cgHI6gnw">Roshal ARchive</a> compressed archive v5.00 onwards</td></tr><tr><td>7F 45 4C 46</td><td>␡ELF</td><td>0</td><td>none, .axf, .bin, .elf, .o, .out, .prx, .puff, .ko, .mod, .so</td><td><a href="/facts/Executable_and_Linkable_Format/ro2CYqso">Executable and Linkable Format</a></td></tr><tr><td>89 50 4E 47 0D 0A 1A 0A</td><td>‰PNG␍␊␚␊</td><td>0</td><td>png</td><td>Image encoded in the <a href="/facts/Portable_Network_Graphics/mwgK6xw5">Portable Network Graphics</a> format</td></tr><tr><td>0E 03 13 01</td><td>␅␃␓␁</td><td>0</td><td>hdf4h4</td><td>Data stored in version 4 of the <a href="/facts/Hierarchical_Data_Format/IaIFvRP1">Hierarchical Data Format</a>.</td></tr><tr><td>89 48 44 46 0D 0A 1A 0A</td><td>‰HDF␍␊␚␊</td><td>0, 512, 1024, 2048, ...</td><td>hdf5h5</td><td>Data stored in version 5 of the <a href="/facts/Hierarchical_Data_Format/IaIFvRP1">Hierarchical Data Format</a>.</td></tr><tr><td>C9</td><td>É</td><td>0</td><td>com</td><td><a href="/facts/COM_file_(CP%2fM)/3SXSyIxa">CP/M 3</a> and higher with overlays</td></tr><tr><td>CA FE BA BE</td><td>Êþº¾</td><td>0</td><td>class</td><td><a href="/facts/Java_class_file/vswVom1C">Java class file</a>, <a href="/facts/Fat_binary/53cdyr4C">Mach-O Fat Binary</a></td></tr><tr><td>EF BB BF</td><td></td><td>0</td><td>txt<i>others</i></td><td><a href="/facts/UTF-8/xlaVHSyf">UTF-8</a> <a href="/facts/Byte_order_mark/IuLXutEV">byte order mark</a>, commonly seen in text files.</td></tr><tr><td>FF FE</td><td>ÿþ</td><td>0</td><td>txt<i>others</i></td><td><a href="/facts/UTF-16LE/ofSmbCem">UTF-16LE</a> byte order mark, commonly seen in text files.</td></tr><tr><td>FE FF</td><td>þÿ</td><td>0</td><td>txt<i>others</i></td><td><a href="/facts/UTF-16BE/ofSmbCem">UTF-16BE</a> byte order mark, commonly seen in text files.</td></tr><tr><td>FF FE 00 00</td><td>ÿþ␀␀</td><td>0</td><td>txt<i>others</i></td><td><a href="/facts/UTF-32LE/YF6Me5na">UTF-32LE</a> byte order mark for text</td></tr><tr><td>00 00 FE FF</td><td>␀␀þÿ</td><td>0</td><td>txt<i>others</i></td><td><a href="/facts/UTF-32BE/YF6Me5na">UTF-32BE</a> byte order mark for text</td></tr><tr><td>2B 2F 76 382B 2F 76 392B 2F 76 2B2B 2F 76 2F</td><td>+/v8+/v9+/v++/v/</td><td>0</td><td></td><td><a href="/facts/UTF-7/hgtoda30">UTF-7</a> byte order mark for text</td></tr><tr><td>0E FE FF</td><td>␎þÿ</td><td>0</td><td>txt<i>others</i></td><td><a href="/facts/Standard_Compression_Scheme_for_Unicode/GKVleuVs">SCSU</a> byte order mark for text</td></tr><tr><td>DD 73 66 73</td><td>Ýsfs</td><td>0</td><td></td><td><a href="/facts/UTF-EBCDIC/JVA5CU4A">UTF-EBCDIC</a> byte order mark for text</td></tr><tr><td>FE ED FA CE</td><td>þíúÎ</td><td>00x1000</td><td></td><td><a href="/facts/Mach-O/3agPpt56">Mach-O</a> binary (32-bit)</td></tr><tr><td>FE ED FA CF</td><td>þíúÏ</td><td>00x1000</td><td></td><td>Mach-O binary (64-bit)</td></tr><tr><td>FE ED FE ED</td><td>þíþí</td><td>0</td><td></td><td>JKS Javakey Store</td></tr><tr><td>CE FA ED FE</td><td>Îúíþ</td><td>0</td><td></td><td>Mach-O binary (reverse byte ordering scheme, 32-bit)</td></tr><tr><td>CF FA ED FE</td><td>Ïúíþ</td><td>0</td><td></td><td>Mach-O binary (reverse byte ordering scheme, 64-bit)</td></tr><tr><td>25 21 50 53</td><td>%!PS</td><td>0</td><td>ps</td><td><a href="/facts/PostScript/4EeEtnLv">PostScript document</a></td></tr><tr><td>25 21 50 53 2D 41 64 6F 62 65 2D 33 2E 30 20 45 50 53 46 2D 33 2E 30</td><td>%!PS-Adobe-3.0 ESPF-3.0</td><td>0</td><td>epsepsf</td><td><a href="/facts/Encapsulated_PostScript/MxugDBHI">Encapsulated PostScript</a> file version 3.0</td></tr><tr><td>25 21 50 53 2D 41 64 6F 62 65 2D 33 2E 31 20 45 50 53 46 2D 33 2E 30</td><td>%!PS-Adobe-3.1 ESPF-3.0</td><td>0</td><td>epsepsf</td><td><a href="/facts/Encapsulated_PostScript/MxugDBHI">Encapsulated PostScript</a> file version 3.1</td></tr><tr><td>49 54 53 46 03 00 00 00 60 00 00 00</td><td>ITSF␃␀␀␀`␀␀␀</td><td>0</td><td>chm</td><td><a href="/facts/Microsoft_Compiled_HTML_Help/IXu6orUI">MS Windows HtmlHelp Data</a></td></tr><tr><td>3F 5F</td><td>?_</td><td>0</td><td>hlp</td><td>Windows 3.x/95/98 Help file</td></tr><tr><td>25 50 44 46 2D</td><td>%PDF-</td><td>0</td><td>pdf</td><td><a href="/facts/Portable_Document_Format/C9Mn1vYL">PDF document</a></td></tr><tr><td>30 26 B2 75 8E 66 CF 11 A6 D9 00 AA 00 62 CE 6C</td><td>0&²uŽfÏ␑¦Ù␀ª␀bÎl</td><td>0</td><td>asfwmawmv</td><td><a href="/facts/Advanced_Systems_Format/F6qRRGJa">Advanced Systems Format</a></td></tr><tr><td>24 53 44 49 30 30 30 31</td><td>$SDI0001</td><td>0</td><td></td><td><a href="/facts/System_Deployment_Image/1GHAR6nd">System Deployment Image</a>, a disk image format used by <a href="/facts/Microsoft/nGIDDXdx">Microsoft</a></td></tr><tr><td>4F 67 67 53</td><td>OggS</td><td>0</td><td>oggogaogv</td><td><a href="/facts/Ogg/KF4j68N7">Ogg</a>, an <a href="/facts/Open-source_license/FlFTwHmd">open source</a> media container format</td></tr><tr><td>38 42 50 53</td><td>8BPS</td><td>0</td><td>psd</td><td>Photoshop Document file, <a href="/facts/Adobe_Photoshop/f6bbmNx0">Adobe Photoshop</a>'s native file format</td></tr><tr><td>52 49 46 46 ?? ?? ?? ?? 57 41 56 45</td><td>RIFF????WAVE</td><td>0</td><td>wav</td><td><a href="/facts/Waveform_Audio_File_Format/ptUfKleW">Waveform Audio File Format</a></td></tr><tr><td>52 49 46 46 ?? ?? ?? ?? 41 56 49 20</td><td>RIFF????AVI␠</td><td>0</td><td>avi</td><td><a href="/facts/Audio_Video_Interleave/2pr8AoRT">Audio Video Interleave</a> video format</td></tr><tr><td>FF FBFF F3FF F2</td><td>ÿûÿóÿò</td><td>0</td><td>mp3</td><td><a href="/facts/MPEG-1_Layer_3/yrBpxUSD">MPEG-1 Layer 3</a> file without an <a href="/facts/ID3/aAdFX54b">ID3</a> tag or with an <a href="/facts/ID3/aAdFX54b">ID3v</a>1 tag (which is appended at the end of the file)</td></tr><tr><td>49 44 33</td><td>ID3</td><td>0</td><td>mp3</td><td><a href="/facts/MP3/yrBpxUSD">MP3</a> file with an ID3v2 container</td></tr><tr><td>42 4D</td><td>BM</td><td>0</td><td>bmpdib</td><td><a href="/facts/BMP_file_format/I4LtCFLk">BMP</a> file, a <a href="/facts/Bitmap/Fr80ySnT">bitmap</a> format used mostly in the <a href="/facts/Windows/bwhAhuSL">Windows</a> world</td></tr><tr><td>43 44 30 30 31</td><td>CD001</td><td>0x80010x88010x9001</td><td>iso</td><td><a href="/facts/ISO9660/zAEVMFnu">ISO9660</a> CD/DVD image file</td></tr><tr><td>43 44 30 30 31</td><td>CD001</td><td>0x5EAC9</td><td>cdi</td><td>CD-i CD image file</td></tr><tr><td>6D 61 69 6E 2E 62 73</td><td>main.bs</td><td>0</td><td>mgw</td><td>Nintendo <a href="/facts/Game_%2526_Watch/bI6ULCDw">Game & Watch</a> image file</td></tr><tr><td>4E 45 53</td><td>NES</td><td>0</td><td>nes</td><td><a href="/facts/Nintendo_Entertainment_System/YD59GCQQ">Nintendo Entertainment System</a> image file</td></tr><tr><td>A0 32 41 A0 A0 A0</td><td>2A</td><td>0x165A4</td><td>d64</td><td><a href="/facts/Commodore_64/3TPcKDbb">Commodore 64</a> 1541 disk image (D64 format)</td></tr><tr><td>47 53 52 2D 31 35 34 31</td><td>GCR-1541</td><td>0</td><td>g64</td><td><a href="/facts/Commodore_64/3TPcKDbb">Commodore 64</a> 1541 disk image (G64 format)</td></tr><tr><td>A0 33 44 A0 A0</td><td>3D</td><td>0x61819</td><td>d81</td><td><a href="/facts/Commodore_64/3TPcKDbb">Commodore 64</a> 1581 disk image (D81 format)</td></tr><tr><td>43 36 34 20 74 61 70 65 20 69 6D 61 67 65 20 66 69 6C 65</td><td>C64 tape image file</td><td>0</td><td>t64</td><td><a href="/facts/Commodore_64/3TPcKDbb">Commodore 64</a> tape image</td></tr><tr><td>43 36 34 20 43 41 52 54 52 49 44 47 45 20 20 20</td><td>C64 CARTRIDGE␠␠␠</td><td>0</td><td>crt</td><td><a href="/facts/Commodore_64/3TPcKDbb">Commodore 64</a> cartridge image</td></tr><tr><td>53 49 4D 50 4C 45 20 20 3D 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 54</td><td>SIMPLE␠␠ =␠␠␠␠␠␠␠ ␠␠␠␠␠␠␠␠ ␠␠␠␠␠T</td><td>0</td><td>fits</td><td>Flexible Image Transport System (<a href="/facts/FITS/6oa6Xk3l">FITS</a>)</td></tr><tr><td>66 4C 61 43</td><td>fLaC</td><td>0</td><td>flac</td><td><a href="/facts/Free_Lossless_Audio_Codec/TbqpHlWy">Free Lossless Audio Codec</a></td></tr><tr><td>4D 54 68 64</td><td>MThd</td><td>0</td><td>midmidi</td><td><a href="/facts/MIDI/tblhmeFV">MIDI sound file</a></td></tr><tr><td>D0 CF 11 E0 A1 B1 1A E1</td><td>ÐÏ␑ࡱ␚á</td><td>0</td><td>docxlspptmsimsg</td><td><a href="/facts/Compound_File_Binary_Format/7D9qushB">Compound File Binary Format</a>, a container format defined by Microsoft COM. It can contain the equivalent of files and directories. It is used by <a href="/facts/Windows_Installer/PGsKkYBr">Windows Installer</a> and for documents in older versions of <a href="/facts/Microsoft_Office/faD8vYG0">Microsoft Office</a>. It can be used by other programs as well that rely on the COM and OLE API's.</td></tr><tr><td>64 65 78 0A 30 33 35 00</td><td>dex␊035␀</td><td>0</td><td>dex</td><td><a href="/facts/Dalvik_(software)/n7tnxaPt">Dalvik</a> Executable</td></tr><tr><td>4B 44 4D</td><td>KDM</td><td>0</td><td>vmdk</td><td>VMDK files</td></tr><tr><td>23 20 44 69 73 6B 20 44 65 73 63 72 69 70 74 6F</td><td># Disk Descripto</td><td>0</td><td>vmdk</td><td>VMware 4 Virtual Disk description file (split disk)</td></tr><tr><td>43 72 32 34</td><td>Cr24</td><td>0</td><td>crx</td><td><a href="/facts/Google_Chrome/4INfWq37">Google Chrome</a> extension or packaged app</td></tr><tr><td>41 47 44 33</td><td>AGD3</td><td>0</td><td>fh8</td><td><a href="/facts/Adobe_FreeHand/pkg6sBfT">FreeHand</a> 8 document</td></tr><tr><td>05 07 00 00 42 4F 42 4F 05 07 00 00 00 00 00 00 00 00 00 00 00 01</td><td>␅␇␀␀BOBO ␅␇␀␀␀␀␀␀ ␀␀␀␀␀␁</td><td>0</td><td>cwk</td><td><a href="/facts/AppleWorks/0Jl8444t">AppleWorks</a> 5 document</td></tr><tr><td>06 07 E1 00 42 4F 42 4F 06 07 E1 00 00 00 00 00 00 00 00 00 00 01</td><td>␆␇á␀BOBO ␆␇á␀␀␀␀␀ ␀␀␀␀␀␁</td><td>0</td><td>cwk</td><td><a href="/facts/AppleWorks/0Jl8444t">AppleWorks</a> 6 document</td></tr><tr><td>45 52 02 00 00 00</td><td>ER␂␀␀␀</td><td rowspan="2">0</td><td rowspan="2">toast</td><td rowspan="2"><a href="/facts/Roxio_Toast/HyMlbmRq">Roxio Toast</a> disc image file</td></tr><tr><td>8B 45 52 02 00 00 00</td><td>‹ER␂␀␀␀</td></tr><tr><td>6B 6F 6C 79</td><td>koly</td><td>end–512</td><td>dmg</td><td><a href="/facts/Apple_Disk_Image/v7r8Uakn">Apple Disk Image</a> file</td></tr><tr><td>78 61 72 21</td><td>xar!</td><td>0</td><td>xar</td><td><a href="/facts/Xar_(archiver)/v5QjmUbs">eXtensible ARchive</a> format</td></tr><tr><td>50 4D 4F 43 43 4D 4F 43</td><td>PMOCCMOC</td><td>0</td><td>dat</td><td>Windows Files And Settings Transfer Repository See also USMT 3.0 (Win XP) and USMT 4.0 (Win 7) User Guides</td></tr><tr><td>4E 45 53 1A</td><td>NES␚</td><td>0</td><td>nes</td><td>Nintendo Entertainment System ROM file</td></tr><tr><td>75 73 74 61 72 00 30 3075 73 74 61 72 20 20 00</td><td>ustar␀00ustar␠␠␀</td><td>257</td><td>tar</td><td><a href="/facts/Tar_(computing)/DCJ37j3d">tar archive</a></td></tr><tr><td>4F 41 52 ??</td><td>OAR?</td><td>0</td><td>oar</td><td>OAR file archive format, where ?? is the format version.</td></tr><tr><td>74 6F 78 33</td><td>tox3</td><td>0</td><td>tox</td><td>Open source portable voxel file</td></tr><tr><td>4D 4C 56 49</td><td>MLVI</td><td>0</td><td>MLV</td><td><a href="/facts/Magic_Lantern_(firmware)/K1a1UJmA">Magic Lantern</a> Video file</td></tr><tr><td>44 43 4D 01 50 41 33 3050 41 33 30</td><td>DCM␁PA30PA30</td><td>0</td><td></td><td>Windows Update <a href="/facts/Binary_delta_compression/F0xDtEob">Binary Delta Compression</a> file</td></tr><tr><td>37 7A BC AF 27 1C</td><td>7z¼¯'␜</td><td>0</td><td>7z</td><td>7-Zip File Format</td></tr><tr><td>1F 8B</td><td>␟‹</td><td>0</td><td>gztar.gz</td><td><a href="/facts/GZIP/H23uqvyx">GZIP</a> compressed file</td></tr><tr><td>FD 37 7A 58 5A 00</td><td>ý7zXZ␀</td><td>0</td><td>xztar.xz</td><td><a href="/facts/XZ_Utils/HkIBGKps">XZ</a> compression utility using <a href="/facts/Lempel%25E2%2580%2593Ziv%25E2%2580%2593Markov_chain_algorithm/XMBm3MBK">LZMA2</a> compression</td></tr><tr><td>04 22 4D 18</td><td>␄"M␘</td><td>0</td><td>lz4</td><td><a href="/facts/LZ4_(compression_algorithm)/lpqDhvfI">LZ4 Frame Format</a>Remark: LZ4 block format does not offer any magic bytes.</td></tr><tr><td>4D 53 43 46</td><td>MSCF</td><td>0</td><td>cab</td><td>Microsoft Cabinet file</td></tr><tr><td>53 5A 44 44 88 F0 27 33</td><td>SZDDˆð'3</td><td>0</td><td>??_</td><td>Microsoft compressed file in <a href="/facts/Data_compression/gMFuY4FT">Quantum</a> format, used prior to Windows XP. File can be decompressed using Extract.exe or Expand.exe distributed with earlier versions of Windows. After compression, the last character of the original filename extension is replaced with an <a href="/facts/Underscore/KJsRo3tA">underscore</a>, e.g. ‘Setup.exe’ becomes ‘Setup.ex_’.</td></tr><tr><td>46 4C 49 46</td><td>FLIF</td><td>0</td><td>flif</td><td><a href="/facts/Free_Lossless_Image_Format/3C5cNcUY">Free Lossless Image Format</a></td></tr><tr><td>1A 45 DF A3</td><td>␚Eߣ</td><td>0</td><td>mkvmkamksmk3dwebm</td><td><a href="/facts/Matroska/hDrffBx0">Matroska</a> media container, including <a href="/facts/WebM/tP4xgYJc">WebM</a></td></tr><tr><td>4D 49 4C 20</td><td>MIL␠</td><td>0</td><td>stg</td><td>"SEAN : Session Analysis" Training file. Also used in compatible software "Rpw : <a href="/facts/Rowperfect/WvrVEn1S">Rowperfect</a> for Windows" and "RP3W : ROWPERFECT3 for Windows".</td></tr><tr><td>41 54 26 54 46 4F 52 4D ?? ?? ?? ?? 44 4A 56</td><td>AT&TFORM????DJV</td><td>0</td><td>djvudjv</td><td><a href="/facts/DjVu/gDukkcd1">DjVu</a> documentThe following byte is either 55 (U) for single-page or 4D (M) for multi-page documents.</td></tr><tr><td>30 82</td><td>0‚</td><td>0</td><td>der</td><td>DER encoded X.509 certificate</td></tr><tr><td>2D 2D 2D 2D 2D 42 45 47 49 4E 20 43 45 52 54 49 46 49 43 41 54 45 2D 2D 2D 2D 2D</td><td>-----BEGIN CERTIFICATE-----</td><td>0</td><td>crtpem</td><td>PEM encoded X.509 <a href="/facts/Public_key_certificate/J7aYI4Bx">certificate</a></td></tr><tr><td>2D 2D 2D 2D 2D 42 45 47 49 4E 20 43 45 52 54 49 46 49 43 41 54 45 20 52 45 51 55 45 53 54 2D 2D 2D 2D 2D</td><td>-----BEGIN CERTIFICATE REQUEST-----</td><td>0</td><td>csrpem</td><td>PEM encoded X.509 <a href="/facts/Certificate_Signing_Request/0zvqmz2S">Certificate Signing Request</a></td></tr><tr><td>2D 2D 2D 2D 2D 42 45 47 49 4E 20 50 52 49 56 41 54 45 20 4B 45 59 2D 2D 2D 2D 2D</td><td>-----BEGIN PRIVATE KEY-----</td><td>0</td><td>keypem</td><td>PEM encoded X.509 PKCS#8 private key</td></tr><tr><td>2D 2D 2D 2D 2D 42 45 47 49 4E 20 44 53 41 20 50 52 49 56 41 54 45 20 4B 45 59 2D 2D 2D 2D 2D</td><td>-----BEGIN DSA PRIVATE KEY-----</td><td>0</td><td>keypem</td><td>PEM encoded X.509 PKCS#1 <a href="/facts/Digital_Signature_Algorithm/0o0FK486">DSA</a> private key</td></tr><tr><td>2D 2D 2D 2D 2D 42 45 47 49 4E 20 52 45 41 20 50 52 49 56 41 54 45 20 4B 45 59 2D 2D 2D 2D 2D</td><td>-----BEGIN RSA PRIVATE KEY-----</td><td>0</td><td>keypem</td><td>PEM encoded X.509 PKCS#1 <a href="/facts/RSA_(cryptosystem)/XTzyfHuq">RSA</a> private key</td></tr><tr><td>50 75 54 54 59 2D 55 73 65 72 2D 4B 65 79 2D 46 69 6C 65 2D 32 3A</td><td>PuTTY-User-Key-File-2:</td><td>0</td><td>ppk</td><td><a href="/facts/PuTTY/eNhqRU2v">PuTTY</a> private key file version 2</td></tr><tr><td>50 75 54 54 59 2D 55 73 65 72 2D 4B 65 79 2D 46 69 6C 65 2D 33 3A</td><td>PuTTY-User-Key-File-3:</td><td>0</td><td>ppk</td><td><a href="/facts/PuTTY/eNhqRU2v">PuTTY</a> private key file version 3</td></tr><tr><td>2D 2D 2D 2D 2D 42 45 47 49 4E 20 4F 50 45 4E 53 53 48 20 50 52 49 56 41 54 45 20 4B 45 59 2D 2D 2D 2D 2D</td><td>-----BEGIN OPENSSH PRIVATE KEY-----</td><td>0</td><td></td><td><a href="/facts/OpenSSH/2qxJ3Fe7">OpenSSH</a> private key file</td></tr><tr><td>2D 2D 2D 2D 2D 42 45 47 49 4E 20 53 53 48 32 20 4B 45 59 2D 2D 2D 2D 2D</td><td>-----BEGIN SSH2 PUBLIC KEY-----</td><td>0</td><td>pub</td><td><a href="/facts/OpenSSH/2qxJ3Fe7">OpenSSH</a> public key file</td></tr><tr><td>44 49 43 4D</td><td>DICM</td><td>128</td><td>dcm</td><td><a href="/facts/DICOM/BsEVLh79">DICOM Medical File Format</a></td></tr><tr><td>77 4F 46 46</td><td>wOFF</td><td>0</td><td>woff</td><td>WOFF File Format 1.0</td></tr><tr><td>77 4F 46 32</td><td>wOF2</td><td>0</td><td>woff2</td><td>WOFF File Format 2.0</td></tr><tr><td>3C 3F 78 6D 6C 20</td><td><?xml␠</td><td rowspan="6">0after <a href="/facts/Byte_order_mark/IuLXutEV">BOM</a></td><td>xml (<a href="/facts/UTF-8/xlaVHSyf">UTF-8</a> or other 8-bit encodings)</td><td rowspan="6"><a href="/facts/XML/clNgUfWk">eXtensible Markup Language</a></td></tr><tr><td>3C 00 3F 00 78 00 6D 00 6C 00 20</td><td><␀?␀x␀m␀l␀␠␀</td><td>xml (<a href="/facts/UTF-16LE/ofSmbCem">UTF-16LE</a>)</td></tr><tr><td>00 3C 00 3F 00 78 00 6D 00 6C 00 20</td><td>␀<␀?␀x␀m␀l␀␠</td><td>xml (<a href="/facts/UTF-16BE/ofSmbCem">UTF-16BE</a>)</td></tr><tr><td>3C 00 00 00 3F 00 00 00 78 00 00 00 6D 00 00 00 6C 00 00 00 20 00 00 00</td><td><␀␀␀?␀␀␀ x␀␀␀m␀␀␀ l␀␀␀␠␀␀␀</td><td>xml (<a href="/facts/UTF-32LE/YF6Me5na">UTF-32LE</a>)</td></tr><tr><td>00 00 00 3C 00 00 00 3F 00 00 00 78 00 00 00 6D 00 00 00 6C 00 00 00 20</td><td>␀␀␀<␀␀␀? ␀␀␀x␀␀␀m ␀␀␀l␀␀␀␠</td><td>xml (<a href="/facts/UTF-32BE/YF6Me5na">UTF-32BE</a>)</td></tr><tr><td>4C 6F A7 94 93 40</td><td>Lo§”“@</td><td>xml (<a href="/facts/EBCDIC/qAhmvgj0">EBCDIC</a>)</td></tr><tr><td>00 61 73 6D</td><td>␀asm</td><td>0</td><td>wasm</td><td><a href="/facts/WebAssembly/7ukwnxY9">WebAssembly</a> binary format</td></tr><tr><td>CF 84 01</td><td>Ï„␁</td><td>0</td><td>lep</td><td>Lepton compressed JPEG image</td></tr><tr><td>43 57 53</td><td>CWS</td><td rowspan="2">0</td><td rowspan="2">swf</td><td rowspan="2"><a href="/facts/Adobe_Flash/3Lrp9JuH">Adobe Flash</a> .swf</td></tr><tr><td>46 57 53</td><td>FWS</td></tr><tr><td>21 3C 61 72 63 68 3E 0A</td><td>!<arch>␊</td><td>0</td><td>deb</td><td>linux deb file</td></tr><tr><td>52 49 46 46 ?? ?? ?? ?? 57 45 42 50</td><td>RIFF????WEBP</td><td>0</td><td>webp</td><td>Google WebP image file, where ?? ?? ?? ?? is the file size. More information on <a href="https://developers.google.com/speed/webp/docs/riff_container#webp_file_header">WebP File Header</a></td></tr><tr><td>27 05 19 56</td><td>'␅␙V</td><td>0</td><td></td><td>U-Boot / uImage. <a href="/facts/Das_U-Boot/ePTYfLk1">Das U-Boot</a> Universal Boot Loader.</td></tr><tr><td>7B 5C 72 74 66 31</td><td>{\rtf1</td><td>0</td><td>rtf</td><td>Rich Text Format</td></tr><tr><td>54 41 50 45</td><td>TAPE</td><td>0</td><td></td><td><a href="/facts/Microsoft_Tape_Format/2SfTFW7E">Microsoft Tape Format</a></td></tr><tr><td>47</td><td>G</td><td>00xBC0x178...(every 188th byte)</td><td>tstsvtsampgmpeg</td><td>MPEG Transport Stream (MPEG-2 Part 1)</td></tr><tr><td>00 00 01 BA</td><td>␀␀␁º</td><td>0</td><td>m2pvobmpgmpeg</td><td>MPEG Program Stream (MPEG-1 Part 1 (essentially identical) and MPEG-2 Part 1)</td></tr><tr><td>00 00 01 B3</td><td>␀␀␁³</td><td>0</td><td>mpgmpeg</td><td>MPEG-1 video and MPEG-2 video (MPEG-1 Part 2 and MPEG-2 Part 2)</td></tr><tr><td>66 74 79 70 69 73 6F 6D</td><td>ftypisom</td><td>4</td><td>mp4</td><td>ISO Base Media file (MPEG-4)</td></tr><tr><td>66 74 79 70 4D 53 4E 56</td><td>ftypMSNV</td><td>4</td><td>mp4</td><td>MPEG-4 video file</td></tr><tr><td>78 01</td><td>x␁</td><td rowspan="8">0</td><td rowspan="8">zlib</td><td>No Compression (no preset dictionary)</td></tr><tr><td>78 5E</td><td>x^</td><td>Best speed (no preset dictionary)</td></tr><tr><td>78 9C</td><td>xœ</td><td>Default Compression (no preset dictionary)</td></tr><tr><td>78 DA</td><td>xÚ</td><td>Best Compression (no preset dictionary)</td></tr><tr><td>78 20</td><td>x␠</td><td>No Compression (with preset dictionary)</td></tr><tr><td>78 7D</td><td>x}</td><td>Best speed (with preset dictionary)</td></tr><tr><td>78 BB</td><td>x»</td><td>Default Compression (with preset dictionary)</td></tr><tr><td>78 F9</td><td>xù</td><td>Best Compression (with preset dictionary)</td></tr><tr><td>62 76 78 32</td><td>bvx2</td><td>0</td><td>lzfse</td><td>LZFSE - Lempel-Ziv style data compression algorithm using Finite State Entropy coding. OSS by Apple.</td></tr><tr><td>4F 52 43</td><td>ORC</td><td>0</td><td>orc</td><td><a href="/facts/Apache_ORC/INdFBRpm">Apache ORC</a> (Optimized Row Columnar) file format</td></tr><tr><td>4F 62 6A 01</td><td>Obj␁</td><td>0</td><td>avro</td><td><a href="/facts/Apache_Avro/eTn7FdRH">Apache Avro</a> binary file format</td></tr><tr><td>53 45 51 36</td><td>SEQ6</td><td>0</td><td>rc</td><td><a href="/facts/RCFile/caWBPMKx">RCFile</a> columnar file format</td></tr><tr><td>3C 72 6F 62 6C 6F 78 21 </td><td><roblox!</td><td>0</td><td>rbxl</td><td>Roblox place file </td></tr><tr><td>65 87 78 56</td><td>e‡xV</td><td>0</td><td>p25obt</td><td>PhotoCap Object Templates</td></tr><tr><td>55 55 AA AA</td><td>UUªª</td><td>0</td><td>pcv</td><td>PhotoCap Vector</td></tr><tr><td>78 56 34</td><td>xV4</td><td>0</td><td>pbtpdtpeapebpetpgtpictpjtpktpmt</td><td>PhotoCap Template</td></tr><tr><td>50 41 52 31</td><td>PAR1</td><td>0</td><td></td><td><a href="/facts/Apache_Parquet/BuT8WYeR">Apache Parquet</a> columnar file format</td></tr><tr><td>45 4D 58 32</td><td>EMX2</td><td>0</td><td>ez2</td><td><a href="/facts/E-mu_Emax/U3IRvh0X">Emulator Emaxsynth</a> samples</td></tr><tr><td>45 4D 55 33</td><td>EMU3</td><td>0</td><td>ez3iso</td><td><a href="/facts/E-mu_Emulator/xSYqRujE">Emulator III</a> synth samples</td></tr><tr><td>1B 4C 75 61</td><td>␛Lua</td><td>0</td><td>luac</td><td><a href="/facts/Lua_(programming_language)/xkBCgta0">Lua</a> <a href="/facts/Bytecode/EPkMFR7M">bytecode</a></td></tr><tr><td>62 6F 6F 6B 00 00 00 00 6D 61 72 6B 00 00 00 00</td><td>book␀␀␀␀mark␀␀␀␀</td><td>0</td><td>alias</td><td>macOS file Alias (<a href="/facts/Symbolic_link/laB0S68t">Symbolic link</a>)</td></tr><tr><td>5B 5A 6F 6E 65 54 72 61 6E 73 66 65 72 5D</td><td>[ZoneTransfer]</td><td>0</td><td>Identifier</td><td>Microsoft Zone Identifier for URL Security Zones</td></tr><tr><td>52 65 63 65 69 76 65 64 3A</td><td>Received:</td><td>0</td><td>eml</td><td>Email Message var5</td></tr><tr><td>20 02 01 62 A0 1E AB 07 02 00 00 00</td><td>␠␂␁b⍽␞«␇␂␀␀␀</td><td>0</td><td>tde</td><td>Tableau Datasource</td></tr><tr><td>37 48 03 02 00 00 00 00 58 35 30 39 4B 45 59</td><td>7H␃␂␀␀␀␀X509KEY</td><td>0</td><td>kdb</td><td>KDB file</td></tr><tr><td>85 ?? ?? 03</td><td>…??␃</td><td>0</td><td>pgp</td><td>PGP file </td></tr><tr><td>28 B5 2F FD</td><td>(µ/ý</td><td>0</td><td>zst</td><td><a href="/facts/Zstandard/eA9hBQzN">Zstandard</a> compress</td></tr><tr><td>52 53 56 4B 44 41 54 41</td><td>RSVKDATA</td><td>0</td><td>rs</td><td>QuickZip rs compressed archive</td></tr><tr><td>3A 29 0A</td><td>:)␊</td><td>0</td><td>sml</td><td><a href="/facts/Smile_(data_interchange_format)/MnNSYfTQ">Smile</a> file</td></tr><tr><td>4A 6F 79 21</td><td>Joy!</td><td>0</td><td></td><td><a href="/facts/Preferred_Executable_Format/FgJ0YgXy">Preferred Executable Format</a></td></tr><tr><td>34 12 AA 55</td><td>4␒ªU</td><td>0</td><td>vpk</td><td>VPK file, used to store game data for some <a href="/facts/Source_Engine/5sHPl3hr">Source Engine</a> games</td></tr><tr><td>2A 2A 41 43 45 2A 2A</td><td>**ACE**</td><td>7</td><td>ace</td><td><a href="/facts/ACE_(compressed_file_format)/1cDImzm6">ACE (compressed file format)</a></td></tr><tr><td>60 EA</td><td>`ê</td><td>0</td><td>arj</td><td><a href="/facts/ARJ/PPXbE4mq">ARJ</a></td></tr><tr><td>49 53 63 28</td><td>ISc(</td><td>0</td><td>cab</td><td><a href="/facts/InstallShield/1hFpJR0S">InstallShield</a> CAB Archive File</td></tr><tr><td>4B 57 41 4A</td><td>KWAJ</td><td>0</td><td>??_</td><td>Windows 3.1x Compressed File</td></tr><tr><td>53 5A 44 44</td><td>SZDD</td><td>0</td><td>??_</td><td>Windows 9x Compressed File</td></tr><tr><td>5A 4F 4F</td><td>ZOO</td><td>0</td><td>zoo</td><td><a href="/facts/Zoo_(file_format)/X5CJ3yr2">Zoo (file format)</a></td></tr><tr><td>50 31 0A</td><td>P1␊</td><td>0</td><td>pbm</td><td><a href="/facts/Portable_bitmap/JnAKxh8B">Portable bitmap</a> ASCII</td></tr><tr><td>50 34 0A</td><td>P4␊</td><td>0</td><td>pbm</td><td><a href="/facts/Portable_bitmap/JnAKxh8B">Portable bitmap</a> binary</td></tr><tr><td>50 32 0A</td><td>P2␊</td><td>0</td><td>pgm</td><td><a href="/facts/Portable_Gray_Map/JnAKxh8B">Portable Gray Map</a> ASCII</td></tr><tr><td>50 35 0A</td><td>P5␊</td><td>0</td><td>pgm</td><td><a href="/facts/Portable_Gray_Map/JnAKxh8B">Portable Gray Map</a> binary</td></tr><tr><td>50 33 0A</td><td>P3␊</td><td>0</td><td>ppm</td><td><a href="/facts/Portable_Pixmap/JnAKxh8B">Portable Pixmap</a> ASCII</td></tr><tr><td>50 36 0A</td><td>P6␊</td><td>0</td><td>ppm</td><td><a href="/facts/Portable_Pixmap/JnAKxh8B">Portable Pixmap</a> binary</td></tr><tr><td>D7 CD C6 9A</td><td>×ÍÆš</td><td>0</td><td>wmf</td><td><a href="/facts/Windows_Metafile/cdwb79jW">Windows Metafile</a></td></tr><tr><td>67 69 6D 70 20 78 63 66</td><td>gimp xcf</td><td>0</td><td>xcf</td><td><a href="/facts/XCF_(file_format)/mF0V0rRq">XCF (file format)</a></td></tr><tr><td>2F 2A 20 58 50 4D 20 2A 2F</td><td>/* XPM */</td><td>0</td><td>xpm</td><td><a href="/facts/X_PixMap/4DqfE6Gf">X PixMap</a></td></tr><tr><td>41 46 46</td><td>AFF</td><td>0</td><td>aff</td><td>Advanced Forensics Format</td></tr><tr><td>45 56 46 32</td><td>EVF2</td><td>0</td><td>Ex01</td><td><a href="/facts/EnCase/AT8GP3YS">EnCase</a> EWF version 2 format</td></tr><tr><td>45 56 46</td><td>EVF</td><td>0</td><td>e01</td><td><a href="/facts/EnCase/AT8GP3YS">EnCase</a> EWF version 1 format</td></tr><tr><td>51 46 49</td><td>QFI</td><td>0</td><td>qcow</td><td><a href="/facts/Qcow/II6bu664">qcow</a> file format</td></tr><tr><td>52 49 46 46 ?? ?? ?? ?? 41 43 4F 4E</td><td>RIFF????ACON</td><td>0</td><td>ani</td><td><a href="/facts/Animated_cursor/bGhgwPSq">Animated cursor</a></td></tr><tr><td>52 49 46 46 ?? ?? ?? ?? 43 44 44 41</td><td>RIFF????CDDA</td><td>0</td><td>cda</td><td><a href="/facts/.cda_file/yoKRGNfm">.cda file</a></td></tr><tr><td>52 49 46 46 ?? ?? ?? ?? 51 4C 43 4D</td><td>RIFF????QLCM</td><td>0</td><td>qcp</td><td><a href="/facts/Qualcomm_PureVoice/nbkrTquM">Qualcomm PureVoice</a> file format</td></tr><tr><td>52 49 46 58 ?? ?? ?? ?? 46 47 44 4D (big-endian)</td><td>RIFX????FGDM</td><td rowspan="2">0</td><td rowspan="2">dcr</td><td rowspan="2"><a href="/facts/Adobe_Shockwave/uqb1pr9x">Adobe Shockwave</a></td></tr><tr><td>58 46 49 52 ?? ?? ?? ?? 4D 44 47 46 (little-endian)</td><td>XFIR????MDGF</td></tr><tr><td>52 49 46 58 ?? ?? ?? ?? 4D 56 39 33 (big-endian)</td><td>RIFX????MV93</td><td rowspan="2">0</td><td rowspan="2">dirdxrdrx</td><td rowspan="2"><a href="/facts/Macromedia_Director/N6a7Vltl">Macromedia Director</a> file format</td></tr><tr><td>58 46 49 52 ?? ?? ?? ?? 33 39 56 4D (little-endian)</td><td>XFIR????39VM</td></tr><tr><td>46 4C 56</td><td>FLV</td><td>0</td><td>flv</td><td><a href="/facts/Flash_Video/rbbPoE7H">Flash Video</a> file</td></tr><tr><td>3C 3C 3C 20 4F 72 61 63 6C 65 20 56 4D 20 56 69 72 74 75 61 6C 42 6F 78 20 44 69 73 6B 20 49 6D 61 67 65 20 3E 3E 3E</td><td><<< Oracle VM VirtualBox Disk Image >>></td><td>0</td><td>vdi</td><td><a href="/facts/VirtualBox/8wordR1n">VirtualBox</a> Virtual Hard Disk file format</td></tr><tr><td>63 6F 6E 65 63 74 69 78</td><td>conectix</td><td>0</td><td>vhd</td><td><a href="/facts/Windows_Virtual_PC/wKdazyS3">Windows Virtual PC</a> Virtual Hard Disk file format</td></tr><tr><td>76 68 64 78 66 69 6C 65</td><td>vhdxfile</td><td>0</td><td>vhdx</td><td><a href="/facts/Windows_Virtual_PC/wKdazyS3">Windows Virtual PC</a> Windows 8 Virtual Hard Disk file format</td></tr><tr><td>49 73 5A 21</td><td>IsZ!</td><td>0</td><td>isz</td><td>Compressed <a href="/facts/ISO_image/LrE8odYa">ISO image</a></td></tr><tr><td>44 41 41</td><td>DAA</td><td>0</td><td>daa</td><td><a href="/facts/Direct_Access_Archive/hh0tcyxH">Direct Access Archive</a> PowerISO</td></tr><tr><td>4C 66 4C 65</td><td>LfLe</td><td>0</td><td>evt</td><td>Windows <a href="/facts/Event_Viewer/YkmF3hrP">Event Viewer</a> file format</td></tr><tr><td>45 6C 66 46 69 6C 65</td><td>ElfFile</td><td>0</td><td>evtx</td><td>Windows <a href="/facts/Event_Viewer/YkmF3hrP">Event Viewer</a> XML file format</td></tr><tr><td>73 64 62 66</td><td>sdbf</td><td>8</td><td>sdb</td><td>Windows customized database</td></tr><tr><td>50 4D 43 43</td><td>PMCC</td><td>0</td><td>grp</td><td>Windows 3.x <a href="/facts/Program_Manager/KjkFAtut">Program Manager</a> Program Group file format</td></tr><tr><td>4B 43 4D 53</td><td>KCMS</td><td>0</td><td>icm</td><td><a href="/facts/ICC_profile/B9w9h83G">ICC profile</a></td></tr><tr><td>72 65 67 66</td><td>regf</td><td>0</td><td>dathiv</td><td><a href="/facts/Windows_Registry/cH9RlHTp">Windows Registry</a> file</td></tr><tr><td>21 42 44 4E</td><td>!BDN</td><td>0</td><td>pst</td><td>Microsoft Outlook <a href="/facts/Personal_Storage_Table/rgLUCjjn">Personal Storage Table</a> file</td></tr><tr><td>44 52 41 43 4F</td><td>DRACO</td><td>0</td><td>drc</td><td>3D model compressed with Google Draco</td></tr><tr><td>47 52 49 42</td><td>GRIB</td><td>0</td><td>gribgrib2</td><td>Gridded data (commonly weather observations or forecasts) in the <a href="/facts/World_Meteorological_Organization/NWrDcKbl">WMO</a> <a href="/facts/GRIB/Tu10PQa5">GRIB</a> or GRIB2 format</td></tr><tr><td>42 4C 45 4E 44 45 52</td><td>BLENDER</td><td>0</td><td>blend</td><td>Blender File Format</td></tr><tr><td>00 00 00 0C 4A 58 4C 20 0D 0A 87 0A</td><td>␀␀␀␌JXL␠␍␊‡␊</td><td rowspan="2">0</td><td rowspan="2">jxl</td><td rowspan="2">Image encoded in the <a href="/facts/JPEG_XL/gU0o8Kcr">JPEG XL</a> format</td></tr><tr><td>FF 0A</td><td>ÿ␊</td></tr><tr><td>00 01 00 00 00</td><td>␀␁␀␀␀</td><td>0</td><td>ttfttedfont</td><td><a href="/facts/TrueType/6kBap0kH">TrueType</a> font</td></tr><tr><td>4F 54 54 4F</td><td>OTTO</td><td>0</td><td>otf</td><td><a href="/facts/OpenType/u0BfkC5I">OpenType</a> font</td></tr><tr><td>23 25 4D 6F 64 75 6C 65</td><td>#%Module</td><td>0</td><td></td><td>Modulefile for <a href="/facts/Environment_Modules_(software)/I4rUzTDM">Environment Modules</a></td></tr><tr><td>4D 53 57 49 4D 00 00 00 D0 00 00 00 00</td><td>MSWIM␀␀␀Ð␀␀␀␀</td><td>0</td><td>wimswmesd</td><td><a href="/facts/Windows_Imaging_Format/t8TpcWcf">Windows Imaging Format</a> file</td></tr><tr><td>21 2D 31 53 4C 4F 42 1F</td><td>!-1SLOB␟</td><td>0</td><td>slob</td><td>Slob (sorted list of <a href="/facts/Object_storage/NPHWJSW6">Object storages</a>) is a read-only, compressed data store with dictionary-like interface</td></tr><tr><td>AC ED</td><td>¬í</td><td>0</td><td></td><td>Serialized Java Data</td></tr><tr><td>43 72 65 61 74 69 76 65 20 56 6F 69 63 65 20 46 69 6C 65 1A 1A 00</td><td>Creative Voice File</td><td>0</td><td>voc</td><td><a href="/facts/Creative_Voice_file/YmaV9R1I">Creative Voice file</a></td></tr><tr><td>2E 73 6E 64</td><td>.snd</td><td>0</td><td>ausnd</td><td><a href="/facts/Au_file_format/bH8R3coK">Au audio file format</a></td></tr><tr><td>DB 0A CE 00</td><td></td><td>0</td><td></td><td>OpenGL Iris Perfomer .PFB (Performer Fast Binary)</td></tr><tr><td>48 5a 4c 52 00 00 00 18</td><td>HZLR</td><td>0</td><td>hazelrules</td><td>Noodlesoft Hazel </td></tr><tr><td>46 4C 68 64</td><td>FLhd</td><td>0</td><td>flp</td><td>FL Studio Project File</td></tr><tr><td>31 30 4C 46</td><td>10LF</td><td>0</td><td>flm</td><td>FL Studio Mobile Project File</td></tr><tr><td>52 4b 4d 43 32 31 30</td><td>RKMC210</td><td>0</td><td></td><td>Vormetric Encryption DPM Version 2.1 Header</td></tr><tr><td>00 01 00 00 4D 53 49 53 41 4D 20 44 61 74 61 62 61 73 65</td><td>␀␁␀␀MSISAM Database</td><td>0</td><td>mny</td><td>Microsoft Money file</td></tr><tr><td>00 01 00 00 53 74 61 6E 64 61 72 64 20 41 43 45 20 44 42</td><td>␀␁␀␀Standard ACE DB</td><td>0</td><td>accdb</td><td>Microsoft Access 2007 Database</td></tr><tr><td>00 01 00 00 53 74 61 6E 64 61 72 64 20 4A 65 74 20 44 42</td><td>␀␁␀␀Standard Jet DB</td><td>0</td><td>mdb</td><td>Microsoft Access Database</td></tr><tr><td>01 FF 02 04 03 02</td><td>␁ÿ␂␄␃␂</td><td>0</td><td>drw</td><td>Micrografx vector graphic file</td></tr><tr><td>02 64 73 73</td><td>␂dss</td><td>0</td><td>dss</td><td>Digital Speech Standard (Olympus, Grundig, & Phillips) v2</td></tr><tr><td>03 64 73 73</td><td>␃dss</td><td>0</td><td>dss</td><td>Digital Speech Standard (Olympus, Grundig, & Phillips) v3</td></tr><tr><td>03 00 00 00 41 50 50 52</td><td>␃␀␀␀APPR</td><td>0</td><td>adx</td><td>Approach index file</td></tr><tr><td>06 06 ED F5 D8 1D 46 E5 BD 31 EF E7 FE 74 B7 1D</td><td>␆␆íõØ␝Få½1ïçþt·␝</td><td>0</td><td>indd</td><td>Adobe InDesign document</td></tr><tr><td>06 0E 2B 34 02 05 01 01 0D 01 02 01 01 02</td><td>␆␎+4␂␅␁␁␍␁␂␁␁␂</td><td>0-65535 (run-in)</td><td>mxf</td><td>Material Exchange Format file</td></tr><tr><td>07 53 4B 46</td><td>␇SKF</td><td>0</td><td>skf</td><td>SkinCrafter skin file</td></tr><tr><td>07 64 74 32 64 64 74 64</td><td>␇dt2ddtd</td><td>0</td><td>dtd</td><td>DesignTools 2D Design file</td></tr><tr><td>0A 16 6F 72 67 2E 62 69 74 63 6F 69 6E 2E 70 72</td><td>␊␖org.bitcoin.pr</td><td>0</td><td>wallet</td><td>MultiBit Bitcoin wallet file</td></tr><tr><td>0D 44 4F 43</td><td>␍DOC</td><td>0</td><td>doc</td><td>DeskMate Document file</td></tr><tr><td>0E 4E 65 72 6F 49 53 4F</td><td>␎NeroISO</td><td>0</td><td>nri</td><td>Nero CD Compilation</td></tr><tr><td>0E 57 4B 53</td><td>␎WKS</td><td>0</td><td>wks</td><td>DeskMate Worksheet</td></tr><tr><td>0F 53 49 42 45 4C 49 55 53</td><td>␏SIBELIUS</td><td>0</td><td>sib</td><td>Sibelius Music - Score file</td></tr><tr><td>23 20 4D 69 63 72 6F 73 6F 66 74 20 44 65 76 65 6C 6F 70 65 72 20 53 74 75 64 69 6F</td><td># Microsoft Developer Studio</td><td>0</td><td>dsp</td><td>Microsoft Developer Studio project file</td></tr><tr><td>23 21 41 4D 52</td><td>#!AMR</td><td>0</td><td>amr</td><td>Adaptive Multi-Rate ACELP (Algebraic Code Excited Linear Prediction) Codec, commonly audio format with GSM cell phones.</td></tr><tr><td>23 21 53 49 4C 4B 0A</td><td>#!SILK␊</td><td>0</td><td>sil</td><td>Audio compression format developed by Skype</td></tr><tr><td>23 3F 52 41 44 49 41 4E 43 45 0A</td><td>#?RADIANCE␊</td><td>0</td><td>hdr</td><td>Radiance High Dynamic Range image file</td></tr><tr><td>23 40 7E 5E</td><td>#@~^</td><td>0</td><td>vbe</td><td>VBScript Encoded script</td></tr><tr><td>0D F0 1D C0</td><td>␍ð�À</td><td>0</td><td>cdb</td><td>MikroTik WinBox Connection Database (Address Book)</td></tr><tr><td>23 45 58 54 4D 33 55</td><td>#EXTM3U</td><td>0</td><td>m3u<p>m3u8</p></td><td><a href="/facts/M3U/lnR08JM6">Multimedia playlist</a></td></tr><tr><td>6D 64 66 00</td><td>mdf␀</td><td>0</td><td>m</td><td>M2 Archive, used by game developer <a href="/facts/M2_(game_developer)/22aw69Gy">M2</a></td></tr><tr><td>4B 50 4B 41</td><td>KPKA</td><td>0</td><td>pak</td><td><a href="/facts/Capcom/XBPVAyhV">Capcom</a> <a href="/facts/RE_Engine/Ttoxhu8p">RE Engine</a> game data archives</td></tr><tr><td>41 52 43</td><td>ARC</td><td>0</td><td>arc</td><td><a href="/facts/Capcom/XBPVAyhV">Capcom</a> <a href="/facts/MT_Framework/Xv02VVLM">MT Framework</a> game data archives</td></tr><tr><td>41 72 43</td><td>ArC</td><td>0</td><td>arccdx</td><td><a href="/facts/FreeArc/z2LdmWlo">FreeArc</a> file</td></tr><tr><td>D0 4F 50 53</td><td>ÐOPS</td><td>0</td><td>pl</td><td><a href="/facts/Interleaf/VxfbHn3z">Interleaf</a> PrinterLeaf / WorldView document format (now <a href="/facts/Broadvision/5vyBVtH2">Broadvision</a> QuickSilver)</td></tr><tr><td>6E 2B 31 00</td><td>n+1</td><td>344</td><td>nii</td><td>Single file <a href="/facts/Neuroimaging_Informatics_Technology_Initiative/1znKkFtH">NIfTI</a> format, used extensively in biomedical imaging.</td></tr><tr><td>6E 69 31 00</td><td>ni1</td><td>344</td><td>hdr</td><td>Header file of a .hdr/.img pair in <a href="/facts/Neuroimaging_Informatics_Technology_Initiative/1znKkFtH">NIfTI</a> format, used extensively in biomedical imaging.</td></tr><tr><td>52 41 46 36 34</td><td>RAF64</td><td>0</td><td></td><td>Report Builder file from <a href="https://www.digital-metaphors.com/">Digital Metaphors</a></td></tr><tr><td>56 49 53 33</td><td>VIS3</td><td>0</td><td></td><td>Resource file <a href="https://www.visionaire-studio.net/">Visionaire 3.x Engine</a></td></tr><tr><td>4D 53 48 7C42 53 48 7C</td><td>MSH|BSH|</td><td>0</td><td>hl7</td><td>Health Level Seven (HL7) Standard for electronic data exchange <a href="https://www.hl7.eu/HL7v2x/v25/std25/hl7.html">[1]</a></td></tr><tr><td>70 77 72 64 61 74 61</td><td>pwrdata</td><td>0</td><td>pwrdata</td><td>SAP <a href="https://github.com/SAP/power-monitoring-tool-for-macos">Power Monitor</a> (version 1.1.0 and higher) data file</td></tr><tr><td>1a 08</td><td>..</td><td>0</td><td>arc</td><td>ARC archive file</td></tr><tr><td>2d 2d 2d 2d 2d 42 45 47 49 4e 20 50 47 50 20 50 55 42 4c 49 43 20 4b 45 49 20 42 4c 4f 43 4b 2d 2d 2d 2d 2d</td><td>-----BEGIN PGP PUBLIC KEY BLOCK-----</td><td>0</td><td>asc</td><td>Armored PGP public key</td></tr><tr><td>3a 42 61 73 65 20</td><td>:Base </td><td>0</td><td>cnt</td><td>Windows 3.x - Windows 95 Help Contents</td></tr><tr><td>52 49 46 46 ?? ?? ?? ?? 56 44 52 4d</td><td>RIFF????VDRM</td><td>0</td><td>vdr</td><td>VirtualDub</td></tr><tr><td>52 59 46 46 ?? ?? ?? ?? 54 52 49 44</td><td>RIFF????TRID</td><td>0</td><td>trd</td><td>TrID</td></tr><tr><td>52 49 46 46 ?? ?? ?? ?? 73 68 77 34</td><td>RIFF????shw4</td><td>0</td><td>shw</td><td>Corel SHOW! 4.0</td></tr><tr><td>52 49 46 46 ?? ?? ?? ?? 73 68 77 35</td><td>RIFF????shw5</td><td>0</td><td>shw</td><td>Corel SHOW! 5.0</td></tr><tr><td>52 49 46 46 ?? ?? ?? ?? 73 68 72 35</td><td>RIFF????shr5</td><td>0</td><td>shr</td><td>Corel SHOW! 5.0 player</td></tr><tr><td>52 49 46 46 ?? ?? ?? ?? 73 68 62 35</td><td>RIFF????shb5</td><td>0</td><td>shb</td><td>Corel SHOW! 5.0 background</td></tr><tr><td>52 49 46 46 ?? ?? ?? ?? 52 4d 4d 50</td><td>RIFF????RMMP</td><td>0</td><td>mmm</td><td>MacroMind Multimedia Movie or Microsoft Multimedia Movie</td></tr><tr><td>41 53 54 4d 2d 45 35 37</td><td>ASTM-E57</td><td>0</td><td>e57</td><td>ASTM E57 3D file format</td></tr><tr><td>aa aa aa aa</td><td>ªªªª</td><td>0</td><td>sys</td><td><a href="/facts/Crowdstrike/BuKhwdR5">Crowdstrike</a> Channel File</td></tr><tr><td>8C 0A 00</td><td>Œ..</td><td>0</td><td>ucas</td><td><a href="/facts/Unreal_Engine/0ghxRQl8">Unreal Engine</a> Compressed Asset Storage file</td></tr><tr><td>2D 3D 3D 2D 2D 3D 3D 2D 2D 3D 3D 2D 2D 3D 3D 2D</td><td>-==--==--==--==-</td><td>0</td><td>utoc</td><td><a href="/facts/Unreal_Engine/0ghxRQl8">Unreal Engine</a> Table of Contents file</td></tr><tr><td>43 36 34 46 69 6C 65 00</td><td>C64File</td><td>0</td><td>P00 (P01, P02,...)</td><td><a href="/facts/Commodore_64/3TPcKDbb">Commodore 64</a> binary file (source:<p><a href="https://www.salto.at/Power64/Documentation/Power64-Leggimi/AE-Formati_File.html#Section%20E.1">*.P00 format for Power64 emulator</a>)</p></td></tr><tr><td>44 55 43 4B</td><td>DUCK</td><td>8</td><td></td><td><a href="/facts/DuckDB/GkXvzpBx">DuckDB</a> database file (source:<p><a href="https://github.com/duckdb/duckdb/blob/main/src/include/duckdb/storage/storage_info.hpp#L69">Source code</a>)</p></td></tr></tbody></table>