{
 "id": "webm",
 "name": "WebM",
 "category": "video",
 "identifiers": {
  "extensions": [
   "webm"
  ],
  "mime": [
   "video/webm",
   "audio/webm"
  ],
  "puid": [
   "fmt/573"
  ],
  "wikidata": [
   "Q309440"
  ],
  "magic": [
   {
    "offset": 0,
    "hex": "1a45dfa3",
    "notes": "WebM"
   }
  ],
  "signatures": [
   {
    "name": "WebM",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "1a45dfa3{0-32}4282847765626d4287"
     }
    ]
   }
  ],
  "loc_fdd": [
   "fdd000518"
  ]
 },
 "status": "writable",
 "summary": "WebM is a media file format, developed by Google based on the Extensible Binary Meta Language.",
 "tools": [
  {
   "name": "FFmpeg",
   "url": "https://ffmpeg.org",
   "license": "LGPL-2.1-or-later / GPL-2.0-or-later",
   "open_source": true,
   "reads": true,
   "writes": true
  },
  {
   "name": "Android",
   "url": "https://android.com",
   "reads": true,
   "writes": true,
   "license": "Apache Software License 2.0 / GNU General Public License, version 2.0",
   "open_source": true
  },
  {
   "name": "Any Video Converter",
   "url": "https://www.any-video-converter.com",
   "reads": true,
   "writes": true
  },
  {
   "name": "aomenc",
   "url": "https://www.wikidata.org/wiki/Q106249737",
   "reads": false,
   "writes": true
  },
  {
   "name": "Dokiel",
   "url": "https://doc.scenari.software/Dokiel",
   "reads": true,
   "writes": false,
   "license": "CeCILL / GNU General Public License, version 3.0 / GNU Lesser General Public License, version 3.0 / Mozilla Public License, version 2.0",
   "open_source": true
  },
  {
   "name": "ENVI",
   "url": "https://www.nv5geospatialsoftware.com/Products/ENVI",
   "reads": true,
   "writes": true,
   "license": "proprietary license"
  },
  {
   "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": "EZ CD Audio Converter",
   "url": "https://www.poikosoft.com/",
   "reads": true,
   "writes": false
  },
  {
   "name": "FakeTube",
   "url": "https://faketube.cz",
   "reads": true,
   "writes": false,
   "license": "end-user license agreement"
  },
  {
   "name": "Flowplayer",
   "url": "https://flowplayer.com",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License",
   "open_source": true
  },
  {
   "name": "GStreamer",
   "url": "https://gstreamer.freedesktop.org/",
   "reads": true,
   "writes": false,
   "license": "GNU Library General Public License, version 2.0 or later",
   "open_source": true
  },
  {
   "name": "HandBrake",
   "url": "https://handbrake.fr",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 2.0",
   "open_source": true
  },
  {
   "name": "IrfanView",
   "url": "https://www.irfanview.com/",
   "reads": true,
   "writes": false,
   "license": "freeware"
  },
  {
   "name": "Kid3",
   "url": "https://kid3.kde.org/",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License / GNU General Public License, version 2.0 or later",
   "open_source": true
  },
  {
   "name": "LiVES",
   "url": "http://lives-video.com/",
   "reads": true,
   "writes": false
  },
  {
   "name": "Mapbox GL JS",
   "url": "https://docs.mapbox.com/mapbox-gl-js/",
   "reads": true,
   "writes": false,
   "license": "proprietary license"
  },
  {
   "name": "MapLibre GL JS",
   "url": "https://github.com/maplibre/maplibre-gl-js#readme",
   "reads": true,
   "writes": false,
   "license": "3-clause BSD License",
   "open_source": true
  },
  {
   "name": "Media Player (Windows 11)",
   "url": "https://www.wikidata.org/wiki/Q109616196",
   "reads": true,
   "writes": false
  },
  {
   "name": "Movavi Video Editor",
   "url": "https://www.movavi.com/videoeditor/",
   "reads": true,
   "writes": true,
   "license": "proprietary license"
  },
  {
   "name": "Mozilla Firefox",
   "url": "https://www.firefox.com",
   "reads": true,
   "writes": false,
   "license": "Mozilla Public License, version 2.0",
   "open_source": true
  },
  {
   "name": "Mp3tag",
   "url": "https://www.mp3tag.de/",
   "reads": true,
   "writes": false,
   "license": "free license"
  },
  {
   "name": "Opale",
   "url": "https://doc.scenari.software/Opale",
   "reads": true,
   "writes": false,
   "license": "CeCILL / GNU General Public License, version 3.0 / GNU Lesser General Public License, version 3.0 / Mozilla Public License, version 2.0",
   "open_source": true
  },
  {
   "name": "OvenMediaEngine",
   "url": "https://airensoft.com/ome.html",
   "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": "PowerDVD",
   "url": "https://www.cyberlink.com/products/powerdvd-ultra/overview_en_US.html",
   "reads": true,
   "writes": false,
   "license": "proprietary license"
  },
  {
   "name": "Q108353872",
   "url": "https://glaxnimate.org/",
   "reads": false,
   "writes": true,
   "license": "GNU General Public License, version 3.0",
   "open_source": true
  },
  {
   "name": "Q141647658",
   "url": "https://getartcraft.com/apps/filmcraft",
   "reads": true,
   "writes": false,
   "license": "Apache Software License 2.0 / MIT License",
   "open_source": true
  },
  {
   "name": "Q141647665",
   "url": "https://getartcraft.com/apps/effectcraft",
   "reads": false,
   "writes": true,
   "license": "Apache Software License 2.0 / MIT License",
   "open_source": true
  },
  {
   "name": "Q300915",
   "url": "https://www.foobar2000.org/",
   "reads": true,
   "writes": false,
   "license": "freeware"
  },
  {
   "name": "Q50938515",
   "url": "https://joinpeertube.org/",
   "reads": true,
   "writes": false,
   "license": "GNU Affero General Public License, version 3.0 or later",
   "open_source": true
  },
  {
   "name": "TMPGEnc",
   "url": "https://tmpgenc.pegasys-inc.com/en/product/tvmw6.html",
   "reads": true,
   "writes": false
  },
  {
   "name": "Topaze",
   "url": "https://doc.scenari.software/Topaze/fr/",
   "reads": true,
   "writes": false,
   "license": "CeCILL / GNU General Public License, version 3.0 / GNU Lesser General Public License, version 3.0 / Mozilla Public License, version 2.0",
   "open_source": true
  },
  {
   "name": "Veblr",
   "url": "https://veblr.com",
   "reads": true,
   "writes": false
  },
  {
   "name": "VideoStudio Pro X5",
   "url": "https://www.wikidata.org/wiki/Q110977928",
   "reads": true,
   "writes": false
  },
  {
   "name": "VideoStudio X7",
   "url": "https://www.wikidata.org/wiki/Q113644652",
   "reads": true,
   "writes": true
  },
  {
   "name": "YouTube",
   "url": "https://www.youtube.com/",
   "reads": true,
   "writes": false,
   "license": "end-user license agreement"
  },
  {
   "name": "YouTube App",
   "url": "https://m.youtube.com",
   "reads": true,
   "writes": false,
   "license": "end-user license agreement / proprietary license"
  },
  {
   "name": "YouTube Space Rio",
   "url": "https://www.youtubespacerio.com",
   "reads": true,
   "writes": false
  }
 ],
 "projects": [
  {
   "name": "File Formats Wiki",
   "url": "http://fileformats.archiveteam.org/wiki/WebM",
   "kind": "wiki"
  },
  {
   "name": "PRONOM fmt/573",
   "url": "https://www.nationalarchives.gov.uk/PRONOM/fmt/573",
   "kind": "format-doc"
  },
  {
   "name": "Wikidata Q309440",
   "url": "https://www.wikidata.org/wiki/Q309440",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "converters",
   "ffw",
   "pronom",
   "wikidata"
  ]
 },
 "updated": "2026-10-24",
 "conversions": [
  {
   "to": "flac-free-lossless-audio-codec-1-2-1",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.webm out.flac",
   "fidelity": "partial",
   "losses": "Audio track only: the video is dropped.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "waveform-audio",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.webm out.wav",
   "fidelity": "partial",
   "losses": "Audio track only: the video is dropped.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "mpeg-1-2-audio-layer-3",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.webm out.mp3",
   "fidelity": "lossy",
   "losses": "Lossy audio only: the video is dropped.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "ogg",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.webm out.ogg",
   "fidelity": "lossy",
   "losses": "Lossy audio only: the video is dropped.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "mpeg-4-part-14",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.webm out.mp4",
   "fidelity": "lossy",
   "losses": "Re-encoded with lossy codecs by default; try `-c copy` to remux without re-encoding when the codecs fit the container.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "matroska-1-4",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.webm out.mkv",
   "fidelity": "lossy",
   "losses": "Re-encoded with lossy codecs by default; try `-c copy` to remux without re-encoding when the codecs fit the container.",
   "url": "https://ffmpeg.org"
  }
 ],
 "aliases": [],
 "structure": [],
 "parsers": [],
 "samples": [],
 "claims": [],
 "verification": []
}