{
 "id": "ccitt-group-3",
 "name": "CCITT Group 3",
 "category": "image",
 "identifiers": {
  "extensions": [
   "g3"
  ],
  "mime": [
   "image/g3fax"
  ],
  "wikidata": [
   "Q28234649"
  ]
 },
 "status": "writable",
 "summary": "lossless compressed data format for bi-level images",
 "tools": [
  {
   "name": "ImageMagick",
   "url": "https://imagemagick.org",
   "license": "ImageMagick License",
   "open_source": true,
   "reads": true,
   "writes": true
  },
  {
   "name": "GIMP",
   "url": "https://gimp.org",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 3.0",
   "open_source": true
  },
  {
   "name": "imageio",
   "url": "http://imageio.github.io/",
   "reads": true,
   "writes": false,
   "license": "2-clause BSD License",
   "open_source": true
  },
  {
   "name": "IrfanView",
   "url": "https://www.irfanview.com/",
   "reads": true,
   "writes": false,
   "license": "freeware"
  },
  {
   "name": "Konvertor",
   "url": "http://www.logipole.com/",
   "reads": true,
   "writes": false
  },
  {
   "name": "Netpbm",
   "url": "http://netpbm.sourceforge.net/",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 2.0",
   "open_source": true
  },
  {
   "name": "PuriFile",
   "url": "https://purifile.com",
   "reads": true,
   "writes": false
  }
 ],
 "projects": [
  {
   "name": "File Formats Wiki",
   "url": "http://fileformats.archiveteam.org/wiki/CCITT_Group_3",
   "kind": "wiki"
  },
  {
   "name": "Wikidata Q28234649",
   "url": "https://www.wikidata.org/wiki/Q28234649",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "converters",
   "ffw",
   "wikidata"
  ]
 },
 "updated": "2026-10-24",
 "conversions": [
  {
   "to": "portable-network-graphics",
   "tool": "ImageMagick",
   "command": "convert in.g3 out.png",
   "fidelity": "lossless",
   "losses": "Pixels kept; some metadata, colour profiles or layers may be dropped.",
   "url": "https://imagemagick.org"
  },
  {
   "to": "tagged-image-file-format",
   "tool": "ImageMagick",
   "command": "convert in.g3 out.tif",
   "fidelity": "lossless",
   "losses": "Pixels kept; some metadata, colour profiles or layers may be dropped.",
   "url": "https://imagemagick.org"
  },
  {
   "to": "jpeg-file-interchange-format-1-02",
   "tool": "ImageMagick",
   "command": "convert in.g3 out.jpg",
   "fidelity": "lossy",
   "losses": "Lossy compression.",
   "url": "https://imagemagick.org"
  },
  {
   "to": "webp",
   "tool": "ImageMagick",
   "command": "convert in.g3 out.webp",
   "fidelity": "lossy",
   "losses": "Lossy compression.",
   "url": "https://imagemagick.org"
  },
  {
   "to": "gif",
   "tool": "ImageMagick",
   "command": "convert in.g3 out.gif",
   "fidelity": "lossy",
   "losses": "Reduced to 256 colours.",
   "url": "https://imagemagick.org"
  }
 ],
 "aliases": [],
 "structure": [],
 "parsers": [],
 "samples": [],
 "claims": [],
 "verification": []
}