{
 "id": "webvtt",
 "name": "WebVTT",
 "category": "video",
 "identifiers": {
  "extensions": [
   "vtt"
  ],
  "mime": [
   "text/vtt"
  ],
  "puid": [
   "fmt/1454"
  ],
  "wikidata": [
   "Q3566973"
  ],
  "loc_fdd": [
   "fdd000567"
  ],
  "magic": [
   {
    "offset": 0,
    "hex": "574542565454"
   }
  ],
  "signatures": [
   {
    "name": "Web Video Text Tracks (WebVTT)",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "max_offset": 4,
      "pattern": "574542565454{5-400}[30:35][30:39]3a[30:35][30:39]2e[30:39][30:39][30:39]202d2d3e20{0-5}[30:35][30:39]3a[30:35][30:39]2e[30:39][30:39][30:39]"
     }
    ]
   }
  ]
 },
 "status": "unknown",
 "summary": "WebVTT files are used for captioning or subtitling video content. It is a standard created by the World Wide Web Consortium (W3C) for displaying timed text, and is linked to the HTML5 <track> element. The primary purpose of WebVTT files is to add text overlays to a video. Each time interval is specified in the format (HH:)mm:ss.xxx --> (HH:)mm:ss:xxx e.g. 00:00.000 --> 00:02.310 or 01:00:05.000 --> 01:00:07.000. The (HH:) is optional, but if included must have a minimum of 2 digits representing the hour (more than 2 digits may be used), and where both the minute (mm) and second (ss) parts must be between 00 and 59 inclusive.",
 "projects": [
  {
   "name": "File Formats Wiki",
   "url": "http://fileformats.archiveteam.org/wiki/WebVTT",
   "kind": "wiki"
  },
  {
   "name": "PRONOM fmt/1454",
   "url": "https://www.nationalarchives.gov.uk/PRONOM/fmt/1454",
   "kind": "format-doc"
  },
  {
   "name": "Wikidata Q3566973",
   "url": "https://www.wikidata.org/wiki/Q3566973",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "ffw",
   "pronom",
   "wikidata"
  ]
 },
 "updated": "2026-10-24",
 "aliases": [],
 "structure": [],
 "parsers": [],
 "tools": [],
 "conversions": [],
 "samples": [],
 "claims": [],
 "verification": []
}