{
 "id": "mpeg-1-2-audio-layer-3",
 "name": "MPEG 1/2 Audio Layer 3",
 "family": "mpeg-1",
 "category": "audio",
 "identifiers": {
  "extensions": [
   "mp3"
  ],
  "mime": [
   "audio/mpeg"
  ],
  "puid": [
   "fmt/134"
  ],
  "wikidata": [
   "Q42591"
  ],
  "loc_fdd": [
   "fdd000012",
   "fdd000105"
  ],
  "magic": [
   {
    "offset": 0,
    "hex": "494433",
    "notes": "MPEG-1 Audio Layer 3 with ID3v2 Tag"
   }
  ],
  "uti": [
   "public.mp3"
  ],
  "signatures": [
   {
    "name": "MPEG-1 Audio Layer 3 with ID3v2 Tag",
    "sequences": [
     {
      "position": "eof",
      "offset": 0,
      "pattern": "fffb[10:eb]{46-1439}fffb[10:eb]{46-1439}fffb[10:eb]{46-1439}fffb[10:eb]{46-1439}fffb[10:eb]{46-1439}fffb[10:eb]{46-1439}fffb[10:eb]{47-1795}"
     },
     {
      "position": "bof",
      "offset": 0,
      "pattern": "494433"
     }
    ]
   },
   {
    "name": "MPEG-2 Audio Layer 3 with ID3v2 Tag",
    "sequences": [
     {
      "position": "eof",
      "offset": 0,
      "pattern": "fff3[10:eb]{46-1439}fff3[10:eb]{46-1439}fff3[10:eb]{46-1439}fff3[10:eb]{46-1439}fff3[10:eb]{46-1439}fff3[10:eb]{46-1439}fff3[10:eb]{47-1795}"
     },
     {
      "position": "bof",
      "offset": 0,
      "pattern": "494433"
     }
    ]
   },
   {
    "name": "MPEG-1 Audio Layer 3 with ID3v2 Tag (protected)",
    "sequences": [
     {
      "position": "eof",
      "offset": 0,
      "pattern": "fffa[10:eb]{46-1439}fffa[10:eb]{46-1439}fffa[10:eb]{46-1439}fffa[10:eb]{46-1439}fffa[10:eb]{46-1439}fffa[10:eb]{46-1439}fffa[10:eb]{47-1795}"
     },
     {
      "position": "bof",
      "offset": 0,
      "pattern": "494433"
     }
    ]
   },
   {
    "name": "MPEG-2 Audio Layer 3 with ID3v2 Tag (protected)",
    "sequences": [
     {
      "position": "eof",
      "offset": 0,
      "pattern": "fff2[10:eb]{46-1439}fff2[10:eb]{46-1439}fff2[10:eb]{46-1439}fff2[10:eb]{46-1439}fff2[10:eb]{46-1439}fff2[10:eb]{46-1439}fff2[10:eb]{47-1795}"
     },
     {
      "position": "bof",
      "offset": 0,
      "pattern": "494433"
     }
    ]
   },
   {
    "name": "MPEG-1 Audio Layer 3 without ID3v2 Tag",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "max_offset": 1795,
      "pattern": "fffb[10:eb]{46-1439}fffb[10:eb]{46-1439}fffb[10:eb]{46-1439}fffb[10:eb]{46-1439}fffb[10:eb]{46-1439}fffb[10:eb]{46-1439}fffb[10:eb]{46-1439}fffb[10:eb]{46-1439}fffb[10:eb]{46-1439}fffb[10:eb]"
     }
    ]
   },
   {
    "name": "MPEG-2 Audio Layer 3 without ID3v2 Tag",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "max_offset": 1795,
      "pattern": "fff3[10:eb]{46-1439}fff3[10:eb]{46-1439}fff3[10:eb]{46-1439}fff3[10:eb]{46-1439}fff3[10:eb]{46-1439}fff3[10:eb]{46-1439}fff3[10:eb]{46-1439}fff3[10:eb]{46-1439}fff3[10:eb]{46-1439}fff3[10:eb]"
     }
    ]
   },
   {
    "name": "MPEG-1 Audio Layer 3 without ID3v2 Tag (protected)",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "max_offset": 1795,
      "pattern": "fffa[10:eb]{46-1439}fffa[10:eb]{46-1439}fffa[10:eb]{46-1439}fffa[10:eb]{46-1439}fffa[10:eb]{46-1439}fffa[10:eb]{46-1439}fffa[10:eb]{46-1439}fffa[10:eb]{46-1439}fffa[10:eb]{46-1439}fffa[10:eb]"
     }
    ]
   },
   {
    "name": "MPEG-2 Audio Layer 3 without ID3v2 Tag (protected)",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "max_offset": 1795,
      "pattern": "fff2[10:eb]{46-1439}fff2[10:eb]{46-1439}fff2[10:eb]{46-1439}fff2[10:eb]{46-1439}fff2[10:eb]{46-1439}fff2[10:eb]{46-1439}fff2[10:eb]{46-1439}fff2[10:eb]{46-1439}fff2[10:eb]{46-1439}fff2[10:eb]"
     }
    ]
   },
   {
    "name": "MP3 2.5",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "max_offset": 1795,
      "pattern": "ffe3[10:eb]{46-1439}ffe3[10:eb]{46-1439}ffe3[10:eb]{46-1439}ffe3[10:eb]{46-1439}ffe3[10:eb]{46-1439}ffe3[10:eb]{46-1439}ffe3[10:eb]{46-1439}ffe3[10:eb]{46-1439}ffe3[10:eb]{46-1439}ffe3[10:eb]"
     }
    ]
   }
  ]
 },
 "status": "writable",
 "summary": "MP3 is a digital audio format, formally known as MPEG-1 Audio Layer III or MPEG-2 Audio Layer III. A third variant, known as MPEG 2.5, which supports lower bit rates implemented by the LAME MP3 encoder among others, but is not a recognised standard.",
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   "url": "http://www.apple.com/findouthow/mac/#quicklook",
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   "writes": false
  },
  {
   "name": "Ringtone Media Studio",
   "url": "https://www.wikidata.org/wiki/Q119998210",
   "reads": true,
   "writes": true
  },
  {
   "name": "Roland FP-90X",
   "url": "https://www.roland.com/global/products/fp-90x/",
   "reads": true,
   "writes": false
  },
  {
   "name": "SHOUTcast",
   "url": "https://www.shoutcast.com/",
   "reads": true,
   "writes": false,
   "license": "freeware"
  },
  {
   "name": "SongRec",
   "url": "https://songrec.fossplant.re/",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 3.0",
   "open_source": true
  },
  {
   "name": "SonicStage",
   "url": "https://www.wikidata.org/wiki/Q1564939",
   "reads": true,
   "writes": false,
   "license": "freeware"
  },
  {
   "name": "Sound Forge XP Studio",
   "url": "https://www.wikidata.org/wiki/Q113292059",
   "reads": true,
   "writes": true
  },
  {
   "name": "SoX",
   "url": "https://www.wikidata.org/wiki/Q3487229",
   "reads": true,
   "writes": true,
   "license": "GNU General Public License",
   "open_source": true
  },
  {
   "name": "Strawberry",
   "url": "https://www.strawberrymusicplayer.org/",
   "reads": true,
   "writes": false
  },
  {
   "name": "Sway",
   "url": "http://www.sway.com",
   "reads": true,
   "writes": false
  },
  {
   "name": "Sweep",
   "url": "http://www.metadecks.org/software/sweep/",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License",
   "open_source": true
  },
  {
   "name": "TagScanner",
   "url": "https://www.xdlab.ru/",
   "reads": true,
   "writes": false
  },
  {
   "name": "The Freesound Project",
   "url": "http://www.freesound.org/",
   "reads": true,
   "writes": false,
   "license": "Creative Commons Attribution-NonCommercial 3.0 Unported / Creative Commons Attribution-ShareAlike 3.0 Unported / Creative Commons CC0 License",
   "open_source": true
  },
  {
   "name": "thousand tunes player",
   "url": "http://music.taihe.com/",
   "reads": true,
   "writes": true,
   "license": "proprietary license"
  },
  {
   "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": "Video Factory",
   "url": "https://www.wikidata.org/wiki/Q113584978",
   "reads": true,
   "writes": false
  },
  {
   "name": "VideoStudio X7",
   "url": "https://www.wikidata.org/wiki/Q113644652",
   "reads": true,
   "writes": false
  },
  {
   "name": "VLC media player",
   "url": "https://www.videolan.org/vlc/",
   "reads": true,
   "writes": false,
   "license": "GNU Lesser General Public License, version 2.1 or later",
   "open_source": true
  },
  {
   "name": "WebPlus Essentials",
   "url": "https://www.wikidata.org/wiki/Q109625259",
   "reads": true,
   "writes": false
  },
  {
   "name": "Windows Media Player, version 10",
   "url": "http://www.microsoft.com/windows/windowsmedia/player/10/default.aspx",
   "reads": true,
   "writes": false
  },
  {
   "name": "Windows Media Player, version 11",
   "url": "http://www.microsoft.com/windows/windowsmedia/player/11/default.aspx",
   "reads": true,
   "writes": false
  },
  {
   "name": "Windows Media Player, version 12",
   "url": "https://www.wikidata.org/wiki/Q28018460",
   "reads": true,
   "writes": false
  },
  {
   "name": "Windows Media Player, version 6.4",
   "url": "https://www.wikidata.org/wiki/Q139790984",
   "reads": true,
   "writes": false
  },
  {
   "name": "Windows Media Player, version 7",
   "url": "https://www.wikidata.org/wiki/Q139792281",
   "reads": true,
   "writes": false
  },
  {
   "name": "Windows Media Player, version 8",
   "url": "https://www.wikidata.org/wiki/Q139792269",
   "reads": true,
   "writes": false
  },
  {
   "name": "Windows Media Player, version 9",
   "url": "https://www.wikidata.org/wiki/Q28018572",
   "reads": true,
   "writes": false
  },
  {
   "name": "Xilisoft Video Converter 3",
   "url": "https://www.wikidata.org/wiki/Q122229367",
   "reads": true,
   "writes": false
  },
  {
   "name": "Zoom H6 Handy Recorder",
   "url": "https://www.zoom.co.jp/products/field-video-recording/field-recording/h6-handy-recorder",
   "reads": false,
   "writes": true
  },
  {
   "name": "ACD FotoCanvas Lite",
   "url": "https://www.wikidata.org/wiki/Q116994901",
   "reads": true,
   "writes": false,
   "via": "mpeg-1"
  },
  {
   "name": "ACDSee 5",
   "url": "https://www.wikidata.org/wiki/Q116957642",
   "reads": true,
   "writes": false,
   "via": "mpeg-1"
  },
  {
   "name": "Cuttermaran",
   "url": "https://cuttermaran.azurewebsites.net/",
   "reads": false,
   "writes": true,
   "license": "GNU General Public License",
   "open_source": true,
   "via": "mpeg-1"
  },
  {
   "name": "MainActor",
   "url": "https://www.wikidata.org/wiki/Q6735888",
   "reads": true,
   "writes": false,
   "via": "mpeg-1"
  },
  {
   "name": "TooLAME",
   "url": "https://toolame.sourceforge.net/",
   "reads": false,
   "writes": true,
   "license": "GNU Lesser General Public License",
   "open_source": true,
   "via": "mpeg-1"
  }
 ],
 "projects": [
  {
   "name": "File Formats Wiki",
   "url": "http://fileformats.archiveteam.org/wiki/MP3",
   "kind": "wiki"
  },
  {
   "name": "PRONOM fmt/134",
   "url": "https://www.nationalarchives.gov.uk/PRONOM/fmt/134",
   "kind": "format-doc"
  },
  {
   "name": "Wikidata Q42591",
   "url": "https://www.wikidata.org/wiki/Q42591",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "converters",
   "ffw",
   "pronom",
   "wikidata"
  ]
 },
 "updated": "2026-10-24",
 "aliases": [
  "MP3"
 ],
 "conversions": [
  {
   "to": "flac-free-lossless-audio-codec-1-2-1",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.mp3 out.flac",
   "fidelity": "lossless",
   "losses": "Lossless for decoded audio; a lossy source stays as degraded as it was. WAV may reduce bit depth or drop metadata.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "waveform-audio",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.mp3 out.wav",
   "fidelity": "lossless",
   "losses": "Lossless for decoded audio; a lossy source stays as degraded as it was. WAV may reduce bit depth or drop metadata.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "ogg",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.mp3 out.ogg",
   "fidelity": "lossy",
   "losses": "Lossy re-encoding.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "mpeg-4-part-14",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.mp3 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.mp3 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"
  },
  {
   "to": "webm",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.mp3 out.webm",
   "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"
  }
 ],
 "structure": [],
 "parsers": [],
 "samples": [],
 "claims": [],
 "verification": []
}