ExifTool は、画像、音声、動画、PDFのメタデータの読み取り、書き込み、操作を行うためのフリーでオープンソースのソフトウェアプログラム。プラットフォームに依存せず、Perl ライブラリ（Image::ExifTool）とコマンドラインアプリケーションの両方として利用できる。ExifTool は、さまざまな種類のデジタルワークフローに一般的に組み込まれている Exif、、XMP、JFIF、GeoTIFF、ICCプロファイル、Photoshop IRB、、AFCP、ID3 を含む多くの種類のメタデータや、多くのデジタルカメラのメーカー固有のメタデータ形式などをサポートしている。
メタ情報のカプセル化 ExifTool は独自のオープンメタデータ形式を実装している。多くのソースからのメタ情報をバイナリまたはテキスト形式でカプセル化し、あらゆる種類のファイルにバンドルするように設計されている。既存のデータをラップする単一のファイルにすることも、Exif や XMP メタデータなどを運ぶとして使用することもできる。
ユーザー ExifTool を使用する Web サイトとサービスには次のものある：
Flickr (アップロードされた画像からメタデータを解析する)
Metadata++ XnView Exif Fixer (360°パノラマ固有のメタデータを計算し、画像に追加する)
対応ファイル形式 ExifToolは以下の形式のファイルを読み込み、編集、作成することができる：Supported File Types
読み込み
360 - GoPro 360 video (QuickTime-based) 3FR - Hasselblad raw (TIFF-based) 3G2, 3GP2 - 3rd Gen. Partnership Project 2 audio/video (QuickTime-based) 3GP, 3GPP - 3rd Gen. Partnership Project audio/video (QuickTime-based) A - Unix static library code Archive AA - Audible Audiobook AAE - Apple edit information (XML PLIST-based) AAX - Audible Enhanced Audiobook (QuickTime-based) ACR - American College of Radiology ACR-NEMA (DICOM-like) AFM, ACFM, AMFM - Adobe (Composite/Multiple Master) Font Metrics AI, AIT - Adobe Illustrator (Template, PS or PDF) AIFF, AIF, AIFC - Audio Interchange File Format (Compressed) APE - Monkey's Audio ARQ - Sony Alpha Pixel-Shift raw (TIFF-based) ARW - Sony Alpha raw (TIFF-based) ASF - Microsoft Advanced Systems Format AVI - Audio Video Interleaved (RIFF-based) AVIF - AV1 Image File Format (QuickTime-based) BMP, DIB - Windows BitMaP / Device Independent Bitmap BPG - Better Portable Graphics BTF - BigTIFF (64-bit Tagged Image File Format) CHM - Microsoft Compiled HTML format COS - Capture One Settings (XML-based) CR2 - Canon Raw 2 (TIFF-based) (CR2 specification) CR3 - Canon Raw 3 (QuickTime-based) (CR3 specification) CRM - Canon RAW Movie (QuickTime-based) CRW, CIFF - Canon Raw Camera Image File Format (CRW specification) CS1 - Sinar CaptureShop 1-shot raw (PSD-based) CSV - Comma-Separated Values CZI - Zeiss Integrated Software RAW (ZISRAW) DCM, DC3, DIC, DICM - DICOM - Digital Imaging and Communications in Medicine DCP - DNG Camera Profile (DNG-like) DCR - Kodak Digital Camera Raw (TIFF-based) DFONT - Macintosh Data Fork Font DIVX - DivX media format (ASF-based) DJVU, DJV - DjVu image (AIFF-like) DNG - Digital Negative (TIFF-based) DOC, DOT - Microsoft Word Document/Template (FPX-like) DOCX, DOCM - Office Open XML Document (Macro-enabled) DOTX, DOTM - Office Open XML Document Template (Macro-enabled) DPX - Digital Picture Exchange DR4 - Canon DPP version 4 Recipe DSS, DS2 - Digital Speech Standard DYLIB - Mac OS X Mach-O executable and library files DV - Digital Video DVB - Digital Video Broadcasting (QuickTime-based) DVR-MS - Microsoft Digital Video Recording (ASF-based) EIP - Capture One Enhanced Image Package (ZIP-based) EPS, EPSF, PS - (Encapsulated) PostScript Format EPUB - Electronic Publication Format ERF - Epson Raw Format (TIFF-based) EXE, DLL - DOS/Windows executable and library files EXIF - Exchangeable Image File Format metadata (TIFF-based) EXR - Open EXR (Extended Range) EXV - Exiv2 metadata file (JPEG-based) F4A, F4B, F4P, F4V - Adobe Flash Player 9+ Audio/Video (Quicktime-based) FFF - Hasselblad Flexible File Format (TIFF-based) FFF - FLIR thermal image File Format FITS - Flexible Image Transport System FLA - Macromedia/Adobe Flash project (FPX-like) FLAC - Free Lossless Audio Codec FLIF - Free Lossless Image Format FLV - Flash Video FPF - FLIR Public image Format FPX - FlashPix image GIF - Compuserve Graphics Interchange Format GPR - GoPro Raw (DNG-based) GZ, GZIP - GNU ZIP compressed archive HDP, WDP, JXR - Windows HD Photo / Media Photo / JPEG XR (TIFF-based) HDR - Radiance RGBE (Red Green Blue Exponent) High Dynamic-Range HEIC, HEIF, HIF - High Efficiency Image Format (QuickTime-based) HTML, HTM, XHTML - (Extensible) HyperText Markup Language ICO, CUR - Windows Icon or Cursor ICC, ICM - International Color Consortium color profile ICS, ICAL - iCalendar Schedule IDML - Adobe InDesign Markup Language (ZIP/XML-based) IIQ - Phase One Intelligent Image Quality raw (TIFF-based) IND, INDD, INDT - Adobe InDesign Document/Template (XMP metadata only) INSP - Insta360 Picture (JPEG-based) INSV - Insta360 Video (QuickTime-based) INX - Adobe InDesign Interchange (XML-based, XMP metadata only) ISO - ISO 9660 disk image ITC - iTunes Cover Flow artwork J2C, J2K, JPC - JPEG 2000 codestream JP2, JPF, JPM, JPX - JPEG 2000 image (Compound/Extended) JPEG, JPG, JPE - Joint Photographic Experts Group image (see table below) JSON - JavaScript Object Notation JXL - JPEG XL (Extra longterm) K25 - Kodak DC25 raw (TIFF-based) KDC - Kodak Digital Camera raw (TIFF-based) KEY, KTH - Apple iWork '09 Keynote presentation/Theme LA - Lossless Audio (RIFF-based) LFP, LFR - Lytro Light Field Picture LNK - Microsoft Shell Link (Windows shortcut) LRV - Low-Resolution Video (QuickTime-based) M2TS, MTS, M2T, TS - MPEG-2 Transport Stream (used for AVCHD video) M4A, M4B, M4P, M4V - MPEG-4 Audio/Video (Quicktime-based) MACOS - MacOS "._" sidecar file (may have any extension) MAX - 3D Studio MAX (FPX-like) MEF - Mamiya (raw) Electronic Format (TIFF-based) MIE - Meta Information Encapsulation (MIE specification) MIFF, MIF - Magick Image File Format MKA, MKV, MKS - Matroska Audio/Video/Subtitle MOBI, AZW, AZW3 - Mobipocket electronic book (Palm-based) MODD - Sony Picture Motion metadata (XML PLIST-based) MOI - MOD Information file MOS - Creo Leaf Mosaic (TIFF-based) MOV, QT - Apple QuickTime Movie MP3 - MPEG-1 layer 3 audio (uses ID3 information) MP4 - Motion Picture Experts Group version 4 (Quicktime-based) MPC - Musepack Audio MPEG, MPG, M2V - Motion Picture Experts Group version 1 or 2 MPO - Extended Multi-Picture format (JPEG with MPF extensions) MQV - Sony Mobile QuickTime Video MRW - Minolta Raw MXF - Material Exchange Format NEF - Nikon (raw) Electronic Format (TIFF-based) NMBTEMPLATE - Apple iWork '09 Numbers Template NRW - Nikon Raw (2) (TIFF-based) NUMBERS - Apple iWork '09 Numbers spreadsheet O - Unix compiled code Object ODB, ODC, ODF, ODG, ODI, ODP, ODS, ODT - Open Document Database/Chart/Formula/Graphics/Image/Presentation/Spreadsheet/Text (ZIP/XML-based) OFR - OptimFROG audio (RIFF-based) OGG, OGV - Ogg bitstream container ONP - ON1 Presets OPUS - Ogg Opus audio ORF - Olympus Raw Format (TIFF-based) OTF - Open Type Font PAC - Lossless Predictive Audio Compression (RIFF-based) PAGES - Apple iWork '09 Pages document PCD - Kodak Photo CD Image Pac PCX - PC Paintbrush PDB, PRC - Palm Database PDF - Adobe Portable Document Format PEF - Pentax (raw) Electronic Format (TIFF-based) PFA, PFB - PostScript Font ASCII/Binary PFM - Printer Font Metrics PGF - Progressive Graphics File PICT, PCT - Apple Picture file PLIST - Apple Property List (binary and XML formats) PMP - Sony DSC-F1 Cyber-Shot image PNG, JNG, MNG - Portable/JPEG/Multiple-image Network Graphics PPM, PBM, PGM - Portable Pixel/Bit/Gray Map PPT, PPS, POT - Microsoft PowerPoint Presentation/Slideshow/Template (FPX-like) POTX, POTM - Office Open XML Presentation Template (Macro-enabled) PPAX, PPAM - Office Open XML Presentation Addin (Macro-enabled) PPSX, PPSM - Office Open XML Presentation Slideshow (Macro-enabled) PPTX, PPTM - Office Open XML Presentation (Macro-enabled) PSD, PSB, PSDT - PhotoShop Drawing / Large Document / Template PSP, PSPIMAGE - Paint Shop Pro QTIF, QTI, QIF - QuickTime Image File R3D - Redcode raw video RA - RealAudio RAF - FujiFilm Raw Format RAM, RPM - RealAudio/Plug-in Metafile RAR - RAR Archive RAW - Kyocera Contax N Digital Raw RAW - Panasonic Raw (TIFF-based) RIFF, RIF - Resource Interchange File Format RM, RV, RMVB - Real Media/Video (Variable Bitrate) RSRC - Mac OS Resource RTF - Rich Text Format RW2 - Panasonic Raw 2 (TIFF-based) RWL - Leica Raw (TIFF-based) RWZ - Rawzor compressed image SEQ - FLIR Systems image Sequence SKETCH - Sketch design file SO - Unix ELF executable and Shared Object files SR2 - Sony Raw 2 (TIFF-based) SRF - Sony Raw Format (TIFF-based) SRW - Samsung Raw format (TIFF-based) SVG - Scalable Vector Graphics (XML-based) SWF - Shockwave Flash THM - Canon Thumbnail (JPEG) THMX - Office Open XML Theme TIFF, TIF - Tagged Image File Format TTF, TTC - True Type Font/Collection TORRENT - BitTorrent description file TXT - Text files VCF, VCARD - Virtual Card VOB - Video Object (MPEG-based) VRD - Canon DPP Recipe Data VSD - Microsoft Visio Drawing (FPX-like) WAV - Windows digital audio WAVeform (RIFF-based) WEBM - Google Web Movie (MKV-based) WEBP - Google Web Picture (RIFF-based) WMA, WMV - Windows Media Audio/Video (ASF-based) WTV - Windos recorded TV show WV - WavePack lossless audio (RIFF-based) X3F - Sigma/Foveon raw XCF - GIMP native image format XLS, XLT - Microsoft Excel Spreadsheet/Template (FPX-like) XLSX, XLSM, XLSB - Office Open XML Spreadsheet (Macro-enabled/Binary) XLTX, XLTM - Office Open XML Spreadsheet Template (Macro-enabled) XMP - Extensible Metadata Platform sidecar file ZIP - ZIP archive
編集
360 - GoPro 360 video (QuickTime-based) 3G2, 3GP2 - 3rd Gen. Partnership Project 2 audio/video (QuickTime-based) 3GP, 3GPP - 3rd Gen. Partnership Project audio/video (QuickTime-based) AAX - Audible Enhanced Audiobook (QuickTime-based) AI, AIT - Adobe Illustrator (Template, PS or PDF) ARQ - Sony Alpha Pixel-Shift raw (TIFF-based) ARW - Sony Alpha raw (TIFF-based) AVIF - AV1 Image File Format (QuickTime-based) CR2 - Canon Raw 2 (TIFF-based) (CR2 specification) CR3 - Canon Raw 3 (QuickTime-based) (CR3 specification) CRM - Canon RAW Movie (QuickTime-based) CRW, CIFF - Canon Raw Camera Image File Format (CRW specification) CS1 - Sinar CaptureShop 1-shot raw (PSD-based) DCP - DNG Camera Profile (DNG-like) DNG - Digital Negative (TIFF-based) DR4 - Canon DPP version 4 Recipe DVB - Digital Video Broadcasting (QuickTime-based) EPS, EPSF, PS - (Encapsulated) PostScript Format ERF - Epson Raw Format (TIFF-based) EXIF - Exchangeable Image File Format metadata (TIFF-based) EXV - Exiv2 metadata file (JPEG-based) F4A, F4B, F4P, F4V - Adobe Flash Player 9+ Audio/Video (Quicktime-based) FFF - Hasselblad Flexible File Format (TIFF-based) FLIF - Free Lossless Image Format GIF - Compuserve Graphics Interchange Format GPR - GoPro Raw (DNG-based) HDP, WDP, JXR - Windows HD Photo / Media Photo / JPEG XR (TIFF-based) HEIC, HEIF, HIF - High Efficiency Image Format (QuickTime-based) ICC, ICM - International Color Consortium color profile IIQ - Phase One Intelligent Image Quality raw (TIFF-based) IND, INDD, INDT - Adobe InDesign Document/Template (XMP metadata only) INSP - Insta360 Picture (JPEG-based) JP2, JPF, JPM, JPX - JPEG 2000 image (Compound/Extended) JPEG, JPG, JPE - Joint Photographic Experts Group image (see table below) JXL - JPEG XL (Extra longterm) LRV - Low-Resolution Video (QuickTime-based) M4A, M4B, M4P, M4V - MPEG-4 Audio/Video (Quicktime-based) MEF - Mamiya (raw) Electronic Format (TIFF-based) MIE - Meta Information Encapsulation (MIE specification) MOS - Creo Leaf Mosaic (TIFF-based) MOV, QT - Apple QuickTime Movie MP4 - Motion Picture Experts Group version 4 (Quicktime-based) MPO - Extended Multi-Picture format (JPEG with MPF extensions) MQV - Sony Mobile QuickTime Video MRW - Minolta Raw NEF - Nikon (raw) Electronic Format (TIFF-based) NRW - Nikon Raw (2) (TIFF-based) ORF - Olympus Raw Format (TIFF-based) PDF - Adobe Portable Document Format PEF - Pentax (raw) Electronic Format (TIFF-based) PNG, JNG, MNG - Portable/JPEG/Multiple-image Network Graphics PPM, PBM, PGM - Portable Pixel/Bit/Gray Map PSD, PSB, PSDT - PhotoShop Drawing / Large Document / Template QTIF, QTI, QIF - QuickTime Image File RAF - FujiFilm Raw Format