{
 "id": "hypertext-markup-language-5",
 "name": "Hypertext Markup Language",
 "category": "other",
 "identifiers": {
  "extensions": [
   "htm",
   "html"
  ],
  "mime": [
   "text/html"
  ],
  "puid": [
   "fmt/471"
  ],
  "wikidata": [
   "Q2053"
  ],
  "loc_fdd": [
   "fdd000481"
  ],
  "signatures": [
   {
    "name": "HTML5 Variant 1",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "max_offset": 1024,
      "pattern": "3c21(444f4354595045|646f6374797065){0-4}(48544d4c|68746d6c)3e"
     }
    ]
   },
   {
    "name": "HTML5 Variant 2",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "max_offset": 1024,
      "pattern": "3c21(444f4354595045|646f6374797065){0-4}(48544d4c|68746d6c){0-4}(53595354454d|73797374656d){0-4}(27|22)61626f75743a6c65676163792d636f6d706174(27|22)3e"
     }
    ]
   }
  ],
  "priority_over": [
   "fmt/96"
  ]
 },
 "status": "unknown",
 "summary": "The HyperText Markup Language (HTML) is a markup language designed for the rendering of information via a web browser. It was originally defined as a highly simplified subset of SGML, but is now an international standard, and is maintained by the World Wide Web Consortium (W3C). A HTML document consists of nested elements, each of which may have attributes and content. It begins with an HTML Document Type declaration. HTML 5 does not explicitly define the HTML version or any Document Type Definition (DTD) within the DOCTYPE tag.",
 "tools": [
  {
   "name": "GNU Source-highlight",
   "url": "https://www.gnu.org/software/src-highlite/",
   "reads": false,
   "writes": true
  },
  {
   "name": "AbiWord",
   "url": "https://www.wikidata.org/wiki/Q136775",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 2.0 or later",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "Amira",
   "url": "http://www.amira.com",
   "reads": true,
   "writes": false,
   "via": "html"
  },
  {
   "name": "CitizenGuide.KE",
   "url": "https://www.citizenguide.ke/",
   "reads": true,
   "writes": false,
   "license": "Creative Commons Attribution 4.0 International",
   "via": "html"
  },
  {
   "name": "Cybook Opus",
   "url": "https://www.wikidata.org/wiki/Q4992154",
   "reads": true,
   "writes": false,
   "via": "html"
  },
  {
   "name": "DatabaseSpy",
   "url": "http://www.altova.com/databasespy.html",
   "reads": false,
   "writes": true,
   "license": "end-user license agreement",
   "via": "html"
  },
  {
   "name": "DataGrip",
   "url": "https://www.jetbrains.com/datagrip/",
   "reads": false,
   "writes": true,
   "via": "html"
  },
  {
   "name": "Deark",
   "url": "https://entropymine.com/deark/",
   "reads": false,
   "writes": true,
   "license": "MIT License",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "djot.js",
   "url": "https://www.wikidata.org/wiki/Q116355874",
   "reads": false,
   "writes": true,
   "license": "MIT License",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "djot.lua",
   "url": "https://www.wikidata.org/wiki/Q116355766",
   "reads": false,
   "writes": true,
   "license": "MIT License",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "DynaWeb",
   "url": "https://www.wikidata.org/wiki/Q124454432",
   "reads": false,
   "writes": true,
   "via": "html"
  },
  {
   "name": "FlexPro",
   "url": "http://www.weisang.com/",
   "reads": true,
   "writes": false,
   "license": "proprietary license",
   "via": "html"
  },
  {
   "name": "GNOME Help",
   "url": "https://wiki.gnome.org/Apps/Yelp",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 2.0 or later",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "GNU UnRTF",
   "url": "https://www.gnu.org/software/unrtf/",
   "reads": false,
   "writes": true,
   "via": "html"
  },
  {
   "name": "Google Docs",
   "url": "https://www.google.com/docs/about",
   "reads": true,
   "writes": true,
   "via": "html"
  },
  {
   "name": "Google Docs",
   "url": "https://www.docs.google.com/",
   "reads": true,
   "writes": true,
   "license": "proprietary license",
   "via": "html"
  },
  {
   "name": "htmlq",
   "url": "https://www.wikidata.org/wiki/Q135992081",
   "reads": true,
   "writes": false,
   "license": "MIT License",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "Kobo eReader",
   "url": "http://www.koboereader.com/",
   "reads": true,
   "writes": false,
   "via": "html"
  },
  {
   "name": "Mathematica",
   "url": "https://www.wolfram.com/mathematica/",
   "reads": true,
   "writes": true,
   "license": "proprietary license",
   "via": "html"
  },
  {
   "name": "MuPDF",
   "url": "https://mupdf.com/",
   "reads": false,
   "writes": true,
   "license": "GNU Affero General Public License, version 3.0 or later",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "Navicat",
   "url": "http://www.navicat.com/",
   "reads": true,
   "writes": true,
   "via": "html"
  },
  {
   "name": "Netscape 1.0",
   "url": "https://www.wikidata.org/wiki/Q33129612",
   "reads": false,
   "writes": true,
   "via": "html"
  },
  {
   "name": "Onyx Boox",
   "url": "https://euroshop.boox.com/",
   "reads": true,
   "writes": false,
   "via": "html"
  },
  {
   "name": "Orbada",
   "url": "http://orbada.sourceforge.net",
   "reads": false,
   "writes": true,
   "license": "GNU General Public License",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "Oxygen XML Editor",
   "url": "https://www.oxygenxml.com/",
   "reads": true,
   "writes": true,
   "license": "proprietary license",
   "via": "html"
  },
  {
   "name": "Pandoc",
   "url": "https://pandoc.org/",
   "reads": true,
   "writes": true,
   "license": "GNU General Public License, version 2.0",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "PDF Guru",
   "url": "https://pdfguru.com/",
   "reads": true,
   "writes": false,
   "via": "html"
  },
  {
   "name": "Q1047199",
   "url": "https://imagemagick.org",
   "reads": true,
   "writes": false,
   "license": "ImageMagick License",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "Q207902",
   "url": "https://www.adobe.com/it/acrobat.html",
   "reads": false,
   "writes": true,
   "license": "proprietary license",
   "via": "html"
  },
  {
   "name": "Q220993",
   "url": "https://www.gnumeric.org/",
   "reads": true,
   "writes": true,
   "license": "GNU General Public License, version 2.0 / GNU General Public License, version 3.0",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "Q747793",
   "url": "https://calibre-ebook.com",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 3.0",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "SQL Database Studio",
   "url": "https://sqldatabasestudio.com/",
   "reads": false,
   "writes": true,
   "license": "Common Public License",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "StarOffice 5.2",
   "url": "https://www.wikidata.org/wiki/Q63646514",
   "reads": false,
   "writes": true,
   "via": "html"
  },
  {
   "name": "Stratify",
   "url": "http://www.stratify.org",
   "reads": false,
   "writes": true,
   "via": "html"
  },
  {
   "name": "Supermium",
   "url": "https://win32subsystem.live/supermium/",
   "reads": true,
   "writes": false,
   "license": "3-clause BSD License",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "uMap",
   "url": "https://umap.openstreetmap.fr/",
   "reads": false,
   "writes": true,
   "license": "WTFPL",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "vimwiki",
   "url": "http://vimwiki.github.io/",
   "reads": false,
   "writes": true,
   "license": "MIT License",
   "open_source": true,
   "via": "html"
  },
  {
   "name": "WinhelpCGI",
   "url": "https://www.herdsoft.com/linux/produkte/winhelpcgi.html",
   "reads": false,
   "writes": true,
   "license": "GNU General Public License, version 2.0",
   "open_source": true,
   "via": "html"
  }
 ],
 "projects": [
  {
   "name": "PRONOM fmt/471",
   "url": "https://www.nationalarchives.gov.uk/PRONOM/fmt/471",
   "kind": "format-doc"
  },
  {
   "name": "Wikidata Q2053",
   "url": "https://www.wikidata.org/wiki/Q2053",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "pronom",
   "wikidata"
  ]
 },
 "updated": "2026-10-20",
 "version": "5",
 "aliases": [],
 "structure": [],
 "parsers": [],
 "conversions": [],
 "samples": [],
 "claims": [],
 "verification": [],
 "family": "html"
}