# List of obscure and obtuse file format signatures # obsigs.txt, encoding:utf-8, version:005.108, updated:2023-11-02 Signature Text (CP-1252) Offsets Extensions MIME Types Wikidata Description [00 00 50 52 4F 54] [..PROT] 0 DOC; PTX application/x-protext Q105866027 Arnor Protext 6 Document [00 53 43 52 4D] [.SCRM] 0 S3M audio/x-mod Q1461901 Scream Tracker 3 Module [00 61 73 6D] [.asm] 0 WASM application/wasm Q56827096 WebAssembly Binary [0A A1 67 76 65 72 73 69 6F 6E 02] [.¡gversion.] 0 CAR ? ? Content Addressable Archive (v2) [0D 0A 56 65 72 73 69 6F 6E 3A 56 69 76 6F] [..Version:Vivo] 3 VIV; VIVO video/vnd.vivo; video/vivo Q49989699 VivoActive Video [11 AF] [.¯] 4 FLI video/x-fli; video/x-flic Q5426535 Autodesk Amimator FLIC [12 AF] [.¯] 4 FLC video/x-flc; video/x-flic Q5426535 Autodesk Animator Pro FLIC [1A 01 29 65 05 00 01 00] [..)e....] 0 JLN ? ? Seize The Day Calendar Journal [1B 47] [.G] 0 RLE image/x-compuserve-rle Q28205858 CompuServe RLE Image [1F 9D] [..] 0 Z application/x-compress Q29209269 Unix Compress File [21 42 4D 41] [!BMA] 0 BMA application/x-bma-compressed Q105854232 BMA Compressed Archive [2A 2A 41 43 45 2A 2A] [**ACE**] 6 ACE application/x-ace-compressed Q288256 ACE Compressed Archive [2E 50 42 46] [.PBF] 0 PBF image/x-pbf Q28207064 Portable Bitmap Format [2E 52 4D 46] [.RMF] 0 RM; RA; RV application/vnd.rn-realmedia; video/vnd.rn-realvideo Q1075962 RealMedia Audio/Video Container [2E 72 61 FD] [.raý] 0 RA; RAM audio/vnd.rn-realaudio Q201093 RealAudio Stream [31 BE] [1¾] 0 WRI application/mswrite Q27526866 Microsoft Write Document [32 BE] [2¾] 0 WRI application/mswrite Q27526866 Microsoft Write Document (containing OLE objects) [34 12] [4.] 0 PIC; CLP image/x-pcpaint-pic Q28206876 PCPaint Pictor Image [37 37 37] [777] 0 777 application/x-777-compressed Q105855097 777 Compressed Archive [37 6B 53 74] [7kSt] 0 ZPAQ application/x-zpaq Q47487560 ZPAQ Compressed Archive (old version) [3F 5F 03 00] [?_..] 0 HLP application/winhlp Q1144005 Microsoft WinHelp File [41 4C 5A 01] [ALZ.] 0 ALZ application/x-alz-compressed Q28445588 ALZip Compressed Archive [41 4D 42 31] [AMB1] 0 AMB ? ? Ancient Machine Book [42 45 47 49 4E 3A 56 43 41 4C 45 4E 44 41 52] [BEGIN:VCALENDAR] 0 ICAL; ICS; IFB; IFM text/calendar Q284651 iCalendar Calendaring and Scheduling Information [42 49 58 30 C1 B8 03 9A F1] [BIX0Á..ñ] 0 BIX application/x-bix-compressed Q105854971 BIX Compressed Archive [42 50 47 FB] [BPGû] 0 BPG image/bpg; image/x-bpg Q18640977 Better Portable Graphics Image [43 44 30 30 31] [CD001] 32769; 34817; 36865 ISO application/vnd.efi-iso; application/x-iso9660-image Q815645 ISO-9660 CD Disc Image [43 52 45 47] [CREG] 0 DAT; DAO; POL ? ? Windows 9x Registry File [44 49 43 4D] [DICM] 128 DCM application/dicom Q28205908 DICOM Media File [44 4B 4F] [DKO] 0 CRD application/x-mscardfile Q83884456 Microsoft Cardfile (UNICODE text) [44 4F 43 01] [DOC.] 0 000 ? Q88470357 LocoScript PC Document [44 56 4D 20] [DVM ] 0 DVM ? ? Dunfield Virtual Machine Binary [44 61 79 21 04 01 01 00] [Day!....] 0 ART ? ? Seize The Day Calendar Art [44 AF] [D¯] 4 FLH; FLT video/x-flic ? DTA/EGI FLIC Animation [45 47 47 41] [EGGA] 0 EGG application/x-egg-compressed Q5323042 ALZip Egg Compressed Archive [46 49 46 01] [FIF.] 0 FIF image/fif; image/x-fif Q1440353 Fractal Image File [46 4C 49 46] [FLIF] 0 FLIF image/flif Q21104579 Free Lossless Image Format [46 4F 52 4D xx xx xx xx 41 49 46 46] [FORM....AIFF] 0 AIF; AIFF; AIFC; IFF audio/aiff; audio/x-aiff Q758853 Audio Interchange File Format (IFF) [46 4F 52 4D xx xx xx xx 49 4C 42 4D] [FORM....ILBM] 0 LBM; ILBM; IFF image/x-ilbm; image/x-iff Q2389386 Amiga Interleaved Bitmap (IFF) [46 4F 52 4D xx xx xx xx 53 57 52 54] [FORM....SWRT] 0 AFW ? ? Amiga Final Writer Document (IFF) [46 55 49 46] [FUIF] 0 FUIF image/fuif Q72886200 Free Universal Image Format [48 41] [HA] 0 HA application/ha-compressed ? HA Compressed Archive [48 44 52 0D 0A] [HDR..] 0 SSF ? ? TurboCalc Spreadsheet [48 57 50 20 44 6F 63 75 6D 65 6E 74] [HWP Document] 0 HWP application/x-hwp Q28757958 Hangul Word Processor Document [49 4D 50 4D] [IMPM] 0 IT audio/x-mod Q9296340 Impulse Tracker Module [49 53 63 28] [ISc(] 0 CAB; HDR ? Q28758102 InstallShield CAB Archive [49 54 53 46] [ITSF] 0 CHM application/vnd.ms-htmlhelp Q1023647 Microsoft Compiled HTML [4A 49 46 39 39 61] [JIF99a] 0 JIF image/x-jif Q28206407 Jeff's Image Format [4A 4E] [JN] 0 669 audio/x-mod Q9135198 Composer Extended 669 Module [4A 4F 59 01] [JOY.] 0 000 ? Q88476614 PCW LocoScript Document [4B 77 69 6B 44 72 61 77] [KwikDraw] 0 KWK image/x-xkwk ? KwikDraw (version ≤ 2.02) [4C 52 5A 49] [LRZI] 0 LRZ application/x-lrzip Q28770337 Lrzip Compressed File [4C 5A 49 50] [LZIP] 0 LZ; LZIP application/x-lzip Q105854729 Lzip Compressed File [4C 5A 58] [LZX] 0 LZX application/x-lzx Q28770313 Amiga LZX Compressed Archive [4D 47 43] [MGC] 0 CRD application/x-mscardfile Q83884456 Microsoft Cardfile [4D 53 43 46] [MSCF] 0 CAB application/x-cab-compressed Q194831 Microsoft Cabinet Archive [4D 53 57 49 4D 00 00 00] [MSWIM...] 0 WIM; RWM; SWM application/x-ms-wim Q105856460 Windows Imaging Format [4E 52 52 44 30 30] [NRRD00] 0 NRRD image/x-nrrd Q83548525 Nearly Raw Raster Data [4E F5 46 E9 6C E5] [NuFile] 0 BXY; SDK; SHK application/x-nofx Q60558754 ShrinkIt NoFX Archive [4F 56 49 50 64 00] [OVIPd."] 0 OVP image/x-ovip ? OVIP Image File [4e 53 56] [NSV] 0 NSV video/x-nsv Q7069009 Nullsoft Video [50 41 43 4B] [PACK] 0 PAK application/x-pak Q105854676 Quake Package Archive [51 46 49 FB] [QFIû] 0 IMG; QCOW ? Q1052000 QEMU QCow Disk Image [52 00 65 00 67 00 69 00 73 00 74 00 72 00 79 00] [R.e.g.i.s.t.r.y.] 18 REG application/x-regedit ? Windows Registry Editor 5.00 Data (Windows 2000+) [52 45 47 45 44 49 54] [REGEDIT] 0 REG application/x-regedit Q105860515 Windows Registry Editor 4.0 Data (Windows 9x/NT4) [52 45 7E 5E] [RE~^] 0 RAR application/x-rar-compressed Q243303 RAR Compressed Archive (version ≤ 1.40) [52 49 46 46 xx xx xx xx 53 57 52 54] [RIFF....SWRT] 0 FWT ? ? Final Writer for Windows Document (RIFF) [52 49 46 46 xx xx xx xx 57 45 42 50] [RIFF....WEBP] 0 WEBP image/webp Q62617958 Google WebP Image (RIFF) [52 49 58] [RIX] 0 RIX; SCX; VMG image/x-rix Q28205846 ColoRIX Image [52 4B] [RK] -2 RK application/x-rk-compressed Q16671949 RK Compressed Archive [52 52 47] [RRG] 0 CRD application/x-mscardfile Q83884456 Microsoft Cardfile (including OLE objects) [52 5A 49 50] [RZIP] 0 RZ application/x-rzip Q105853702 RZip Compressed File [52 61 72 21 1A 07 00] [Rar!...] 0 RAR; REV application/vnd.rar; application/x-rar-compressed Q243303 RAR Compressed Archive (version ≥ 1.50) [52 61 72 21 1A 07 01 00] [Rar!....] 0 RAR; REV application/vnd.rar; application/x-rar-compressed Q243303 RAR Compressed Archive (version ≥ 5.00) [53 51 4C 69 74 65 20 66 6F 72 6D 61 74 20 33 00] [SQLite format 3.] 0 DB3; SQLITE3 application/vnd.sqlite3 Q28600453 SQLite Database [55 46 41 C6 D2 C1] [UFAÆÒÁ] 0 UFA application/x-ufa-compressed Q75535250 UFA Compressed Archive [55 48 41] [UHA] 0 UHA application/x-uha-compressed Q3547199 UHARC Compressed Archive [55 AA] [Uª] 510 IMA; IMG ? ? IBM PC Bootable Disk Image [56 41 4C 49 53 2E] [VALIS.] 0 VALIS image/x-valis ? Valis Active Light Image Stream [57 41 52 43 2F] [WARC/] 0 WARC application/warc Q7978505 Web Archive (any version) [59 A6 6A 95] [&'."] 0 SUN; RAS; RAST; SR; SCR image/x-sun-raster Q17138473 Sun Raster Image [5A 49 4D 04] [ZIM.] 0 ZIM application/x-zim Q784695 ZIM Web Content Archive [61 72 74 0D] [art.] 0 ART ? Q28600253 Android Runtime Binary [64 65 78 0A] [dex.] 0 DEX; ODEX ? Q28600487 Android Dalvik Binary [66 61 72 62 66 65 6C 64] [farbfeld] 0 FF image/x-faberfeld Q28206109 Faberfeld Image Format [66 4C 61 43] [fLaC] 0 FLAC audio/flac Q27881556 FLAC Audio File [66 74 79 70 4D 34 41 20] [ftypM4A ] 4 M4A; MP4 audio/mp4 Q336316 MPEG-4 Audio File (ISOBMFF) [66 74 79 70 68 65 69] [ftyphei] 4 HEIC; HEIF image/heic; image/heif Q24907733 HEIC Image File (ISOBMFF) [68 73 71 73] [hsqs] 0 SFS application/filesystem+sqsh Q389314 SquashFS Filesystem [69 66] [if] 0 669 audio/x-mod Q9135198 Composer 669 Module [6B 6F 6C 79] [koly] 0 DMG application/x-apple-disk Q1228757 Apple Disk Image [6C 7A 34 69] [lz4i] 0 LZ4I image/x-lz4i ? Geldreich's LZ4 Compressed Image [71 6F 61 66] [qoaf] 0 QOA audio/x-qua Q116625837 Quite OK Audio Format [71 6F 69 66] [qoif] 0 QOI image/x-qoi Q111843814 Quite OK Image Format [72 65 67 66] [regf] 0 ? ? ? Windows NT Registry Hive File [79 7A] [yz] 0 YZ1 application/x-yz1 Q105854240 Yamazaki Zipper Archive [7A 50 51] [zPQ] 0 ZPAQ application/x-zpaq Q47487560 ZPAQ Compressed Archive [80 2A 5F D7] [€*_×] 0 CIN; DPX image/cineon Q28048413 Kodak Cineon Image (Big Endian) [89 4C 5A 4F 00 0D 0A 1A 0A] [‰LZO.....] 0 LZO application/x-lzop-compressed Q105854029 Lzop Compressed File [D7 5F 2A 80] [×_*€] 0 CIN; DPX image/cineon Q28048413 Kodak Cineon Image (Little Endian) [DC A7 C4 FD] [ܧÄý] 20 ZOO application/x-zoo-compressed Q105854413 ZOO Compressed Archive (Little Endian) [EA xx xx xx xx xx xx xx xx 00] [ê.........] 0 PEA application/x-peazip Q105854595 PeaZip Compressed Archive [F6 04 00 00 F6 04 7F 00] [ö...ö...] 8 KWK image/x-xkwk ? KwikDraw (version ≥ 3.00) [FD 37 7A 58 5A 00] [ý7zXZ] 0 XZ application/x-xz Q162839 XZ Compressed File [FD 4E F2 14] [ýNò.] 446 IMG ? ? NTFS Master Boot Record [FD C4 A7 DC] [ýħÜ] 20 ZOO application/x-zoo-compressed Q105854413 ZOO Compressed Archive (Big Endian) [FF 57 50 43 xx xx xx xx 01 16 01 00] [ÿWPC........] 0 WPG image/x-wpg Q3564764 WordPerfect Graphic 1.0 Image [FF 57 50 43 xx xx xx xx 01 16 02 00] [ÿWPC........] 0 WPG image/x-wpg Q117318924 WordPerfect Graphic 2.0 Image