{
 "id": "adobe-flash-25",
 "name": "Adobe Flash",
 "category": "other",
 "identifiers": {
  "extensions": [
   "swf"
  ],
  "mime": [
   "application/x-shockwave-flash"
  ],
  "puid": [
   "fmt/771"
  ],
  "wikidata": [
   "Q29012120"
  ],
  "magic": [
   {
    "offset": 0,
    "hex": "46575319",
    "notes": "SWF 25"
   },
   {
    "offset": 0,
    "hex": "43575319",
    "notes": "SWF 25 - zlib compressed"
   },
   {
    "offset": 0,
    "hex": "5a575319",
    "notes": "SWF 25 - LZMA compressed"
   }
  ],
  "signatures": [
   {
    "name": "SWF 25",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "46575319"
     },
     {
      "position": "eof",
      "offset": 0,
      "pattern": "0000"
     }
    ]
   },
   {
    "name": "SWF 25 - zlib compressed",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "43575319"
     }
    ]
   },
   {
    "name": "SWF 25 - LZMA compressed",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "5a575319"
     }
    ]
   }
  ]
 },
 "status": "unknown",
 "summary": "The Adobe Flash format, SWF, previously known as Shockwave Flash or Macromedia Shockwave Flash, and alternatively known as the Small Web Format, is a file format primarily designed for creating interactive multimedia applications. The format iterates rapidly, often in line with new releases of Adobe Flash or Adobe Air. Prior to version 6 all SWF files were uncompressed, however version 6 introduced the option of using zlib compression. Version 13 introduced the option of using LZMA compression.",
 "projects": [
  {
   "name": "PRONOM fmt/771",
   "url": "https://www.nationalarchives.gov.uk/PRONOM/fmt/771",
   "kind": "format-doc"
  },
  {
   "name": "Wikidata Q29012120",
   "url": "https://www.wikidata.org/wiki/Q29012120",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "pronom",
   "wikidata"
  ]
 },
 "updated": "2026-10-20",
 "version": "25",
 "aliases": [],
 "structure": [],
 "parsers": [],
 "tools": [],
 "conversions": [],
 "samples": [],
 "claims": [],
 "verification": []
}