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whatwg/html

HTML Standard

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Summary Information

Updated 57 minutes ago
Type:Documentation / SpecificationCategory(s):Documentation ToolsDeveloper Tools
Added to GitGenius on September 7th, 2026
Created on August 8th, 2013
Open Issues & Pull Requests: 2,697 (+0)
GitHub issues: Enabled
Number of forks: 3,211
Total Stargazers: 9,401 (+0)
Total Subscribers: 718 (+0)

Repository Insights (GitGenius)

Median issue/PR response: 7.4 hours
Mean response time: 47.7 days
90th percentile: 19.3 days
Tracked items: 1,509

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Maintainer activity

35 people did triage or write work on this repository in the last 12 months.

At least 17% of html's 35 maintainers work at Google. 22 say where they work, and 6 of those are Google.

Counts unlabeled, assigned, unassigned, milestoned, demilestoned, locked, unlocked over the last 12 months. These are issue and pull request events that require triage or write permission. Commits and code review are not counted. labeled and renamed are excluded because GitHub issue forms record the issue author as the actor. Figures from October 7, 2026. This count is not comparable across projects: each project's automation decides which of these events a person emits.

How this project is maintained

Roughly one issue in five opened in the past year never receives a reply. 71% of open issues come from outside the core team, so the backlog reflects real-world use rather than internal planning. 57% of tracked open issues have had no activity in three months. Only 38% of issues opened in the past year have been closed. Three people close 64% of everything that gets resolved.

Charts & Analytics

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Issue Activity (beta)

Open issues: 965
New in 7 days: 12
Closed in 7 days: 7
Avg open age: 815 days
Stale 30+ days: 868
Stale 90+ days: 694

Recent activity

Opened in 7 days: 10
Closed in 7 days: 6
Comments in 7 days: 34
Events in 7 days: 111

Top labels

  • addition/proposal (433)
  • needs implementer interest (367)
  • topic: forms (129)
  • topic: navigation (129)
  • clarification (76)
  • interop (75)
  • topic: select (75)
  • topic: parser (66)

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Detailed Description

The HTML Standard is the normative specification that defines the HTML language and its associated APIs for web browsers and other user agents.

The project addresses the need for a single authoritative definition of HTML that ensures interoperability across browser implementations. It documents the complete behavior of HTML parsing, rendering, and scripting APIs including Canvas, Web Workers, Web Storage, and Server-Sent Events. The standard is maintained as a single large source file that is processed to generate the human-readable specification published at the official WHATWG website.

Developers and browser vendors use this standard as the reference for implementing HTML support and for resolving ambiguities in how HTML should behave. It is essential for anyone building a browser engine, HTML parser, or tool that needs to understand the precise semantics of HTML. The standard covers not only markup syntax but also the complete DOM API, event handling, and storage mechanisms that modern web applications depend on. Contributors can propose changes through the established guidelines, and the project provides tooling to build and preview the specification locally before submission.

The project maintains an active discussion process for proposed changes, with contributors engaging in technical review of pull requests and issues. The source file is maintained as a single comprehensive document rather than split across multiple files, which requires contributors to use external tools like searchfox for blame tracking due to GitHub's limitations on large files. Tests for the standard are housed separately in the web-platform-tests repository, creating a clear separation between the normative specification and its test suite.