{
 "id": "djvu",
 "name": "DjVu",
 "category": "image",
 "identifiers": {
  "extensions": [
   "djvu",
   "djv"
  ],
  "mime": [
   "image/vnd.djvu",
   "image/x-djvu"
  ],
  "puid": [
   "fmt/255",
   "fmt/318"
  ],
  "wikidata": [
   "Q334677"
  ],
  "magic": [
   {
    "offset": 0,
    "hex": "41542654464f524d",
    "notes": "DjVu File Format"
   }
  ],
  "signatures": [
   {
    "name": "DjVu File Format",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "41542654464f524d{4}(444a564d4449524d|444a5655494e464f)"
     }
    ]
   }
  ]
 },
 "status": "writable",
 "summary": "The DjVu file format is an image file format used primarily for storing scanned documents. The format, developed by AT&T Labs, is based on the Interchange File format. There are three elements that comprise a DjVu encoded image file: the mask which is encoded using the JB2 algorithm; the background encoded using the wavelet-based compression IW44; and the foreground, containing the colour of the text and the line drawings, also encoding using IW44. The background and foreground are usually lower resolution (100 dpi) colour images with the mask at a higher level resolution (e.g. 300 dpi).",
 "tools": [
  {
   "name": "ABBYY FineReader 11",
   "url": "https://pdf.abbyy.com/",
   "reads": true,
   "writes": true,
   "license": "end-user license agreement"
  },
  {
   "name": "Abydos",
   "url": "https://www.wikidata.org/wiki/Q133445760",
   "reads": true,
   "writes": false,
   "license": "GNU Lesser General Public License",
   "open_source": true
  },
  {
   "name": "ACD FotoCanvas Lite",
   "url": "https://www.wikidata.org/wiki/Q116994901",
   "reads": true,
   "writes": false
  },
  {
   "name": "ACDSee 5",
   "url": "https://www.wikidata.org/wiki/Q116957642",
   "reads": true,
   "writes": false
  },
  {
   "name": "Converseen",
   "url": "https://converseen.fasterland.net/",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 3.0",
   "open_source": true
  },
  {
   "name": "CropTool",
   "url": "https://croptool.toolforge.org/",
   "reads": true,
   "writes": false,
   "license": "MIT License",
   "open_source": true
  },
  {
   "name": "DjVuLibre",
   "url": "https://djvu.sourceforge.net/",
   "reads": true,
   "writes": true,
   "license": "GNU General Public License, version 2.0 or later",
   "open_source": true
  },
  {
   "name": "Evince",
   "url": "https://gitlab.gnome.org/GNOME/evince",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 2.0",
   "open_source": true
  },
  {
   "name": "ExifTool",
   "url": "https://exiftool.org/",
   "reads": true,
   "writes": false,
   "license": "Artistic License / GNU General Public License, version 1.0 or later",
   "open_source": true
  },
  {
   "name": "FBReader",
   "url": "https://fbreader.org",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License",
   "open_source": true
  },
  {
   "name": "gscan2pdf",
   "url": "http://gscan2pdf.sourceforge.net/",
   "reads": false,
   "writes": true,
   "license": "GNU General Public License, version 3.0",
   "open_source": true
  },
  {
   "name": "Hanlin eReader",
   "url": "https://www.wikidata.org/wiki/Q812797",
   "reads": true,
   "writes": false
  },
  {
   "name": "IrfanView",
   "url": "https://www.irfanview.com/",
   "reads": true,
   "writes": false,
   "license": "freeware"
  },
  {
   "name": "Lector",
   "url": "https://github.com/BasioMeusPuga/Lector",
   "reads": true,
   "writes": false
  },
  {
   "name": "Okular",
   "url": "https://okular.kde.org",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 2.0",
   "open_source": true
  },
  {
   "name": "Onyx Boox",
   "url": "https://euroshop.boox.com/",
   "reads": true,
   "writes": false
  },
  {
   "name": "PhotoRec",
   "url": "http://www.cgsecurity.org/wiki/PhotoRec",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License",
   "open_source": true
  },
  {
   "name": "Q1047199",
   "url": "https://imagemagick.org",
   "reads": true,
   "writes": false,
   "license": "ImageMagick License",
   "open_source": true
  },
  {
   "name": "Q131382357",
   "url": "https://wiki.mate-desktop.org/mate-desktop/applications/atril/",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 2.0",
   "open_source": true
  },
  {
   "name": "Q479808",
   "url": "https://www.sumatrapdfreader.org",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 3.0",
   "open_source": true
  },
  {
   "name": "Q747793",
   "url": "https://calibre-ebook.com",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 3.0",
   "open_source": true
  },
  {
   "name": "STDU Viewer",
   "url": "https://web.archive.org/web/20150224145333/http://stdutility.com/stduviewer.html",
   "reads": true,
   "writes": false,
   "license": "freeware"
  }
 ],
 "projects": [
  {
   "name": "File Formats Wiki",
   "url": "http://fileformats.archiveteam.org/wiki/DjVu",
   "kind": "wiki"
  },
  {
   "name": "PRONOM fmt/255",
   "url": "https://www.nationalarchives.gov.uk/PRONOM/fmt/255",
   "kind": "format-doc"
  },
  {
   "name": "Wikidata Q334677",
   "url": "https://www.wikidata.org/wiki/Q334677",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "ffw",
   "pronom",
   "wikidata"
  ]
 },
 "updated": "2026-10-24",
 "aliases": [],
 "structure": [],
 "parsers": [],
 "conversions": [],
 "samples": [],
 "claims": [],
 "verification": []
}