{
 "id": "seattle-filmworks",
 "name": "Seattle FilmWorks",
 "category": "image",
 "identifiers": {
  "extensions": [
   "sfw",
   "pwp",
   "pwm",
   "alb"
  ],
  "mime": [
   "image/x-seattle-filmworks"
  ],
  "wikidata": [
   "Q28207261"
  ],
  "magic": [
   {
    "offset": 0,
    "hex": "534657393441",
    "notes": "Seattle FilmWorks Image 94A variant"
   },
   {
    "offset": 0,
    "hex": "534657393841",
    "notes": "Seattle FilmWorks Image 98A variant"
   },
   {
    "offset": 0,
    "hex": "5346575f414c42"
   }
  ],
  "puid": [
   "fmt/1104"
  ],
  "signatures": [
   {
    "name": "Seattle FilmWorks Image 94A variant",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "534657393441"
     }
    ]
   },
   {
    "name": "Seattle FilmWorks Image 98A variant",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "534657393841"
     }
    ]
   }
  ]
 },
 "status": "readable",
 "summary": "Seattle FilmWorks was a mail order film processing company. Digitised photographs made by the company used a family of proprietary raster image formats known as SFW and PWP (PhotoWorks PhotoMail). The SFW format has a compressed version based on JPEG, and an uncompressed version based on BMP.",
 "tools": [
  {
   "name": "ImageMagick",
   "url": "https://imagemagick.org",
   "license": "ImageMagick License",
   "open_source": true,
   "reads": true,
   "writes": false
  },
  {
   "name": "Abydos",
   "url": "https://www.wikidata.org/wiki/Q133445760",
   "reads": true,
   "writes": false,
   "license": "GNU Lesser General Public License",
   "open_source": true
  },
  {
   "name": "Converseen",
   "url": "https://converseen.fasterland.net/",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 3.0",
   "open_source": true
  },
  {
   "name": "IrfanView",
   "url": "https://www.irfanview.com/",
   "reads": true,
   "writes": false,
   "license": "freeware"
  },
  {
   "name": "Photo Suite II SE",
   "url": "https://www.wikidata.org/wiki/Q116319408",
   "reads": true,
   "writes": true
  },
  {
   "name": "PhotoSuite III SE",
   "url": "https://www.wikidata.org/wiki/Q111416514",
   "reads": true,
   "writes": true
  },
  {
   "name": "PhotoWorks 2.41",
   "url": "https://www.wikidata.org/wiki/Q116924176",
   "reads": true,
   "writes": false
  }
 ],
 "projects": [
  {
   "name": "File Formats Wiki",
   "url": "http://fileformats.archiveteam.org/wiki/Seattle_FilmWorks",
   "kind": "wiki"
  },
  {
   "name": "PRONOM fmt/1104",
   "url": "https://www.nationalarchives.gov.uk/PRONOM/fmt/1104",
   "kind": "format-doc"
  },
  {
   "name": "Wikidata Q28207261",
   "url": "https://www.wikidata.org/wiki/Q28207261",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "converters",
   "ffw",
   "pronom",
   "wikidata"
  ]
 },
 "updated": "2026-10-24",
 "conversions": [
  {
   "to": "portable-network-graphics",
   "tool": "ImageMagick",
   "command": "convert in.pwp 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.pwp 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.pwp out.jpg",
   "fidelity": "lossy",
   "losses": "Lossy compression.",
   "url": "https://imagemagick.org"
  },
  {
   "to": "webp",
   "tool": "ImageMagick",
   "command": "convert in.pwp out.webp",
   "fidelity": "lossy",
   "losses": "Lossy compression.",
   "url": "https://imagemagick.org"
  },
  {
   "to": "gif",
   "tool": "ImageMagick",
   "command": "convert in.pwp out.gif",
   "fidelity": "lossy",
   "losses": "Reduced to 256 colours.",
   "url": "https://imagemagick.org"
  }
 ],
 "aliases": [],
 "structure": [],
 "parsers": [],
 "samples": [],
 "claims": [],
 "verification": []
}