# WebPlatformTest/HTML5test

How well does your browser support HTML5?

Repository: https://github.com/WebPlatformTest/HTML5test
Canonical: https://ross.abutalabs.com/products/html5test
Homepage: https://html5test.com
Language: JavaScript
License: MIT
License Family: permissive
Archived: true
Last push: 2024-05-10T07:55:47+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5988, "days_push": 845, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1005, forks 211 (observed 2026-09-03T02:15:08.526842+00:00)

## What it is
HTML5test is a web application that scores how well a browser supports HTML5 and related web specifications, letting users compare results across browsers. The project is officially retired and kept online only as a static snapshot, with no updates since 2016.

## Use cases
- check how well my browser supports html5
- compare html5 support between browsers
- test which html5 features my browser supports
- score a browser's web standards compliance
- find out if a browser supports specific html5 apis

## When to choose
- you need a historical snapshot of browser HTML5 support for research or comparison
- you want a quick, simple feature-detection score for an older browser

## When to avoid
- you need up-to-date web standards testing - the test has not been updated since 2016
- you need modern feature detection in your own code - use a library like Modernizr instead
- you need exhaustive or functional testing of features - the test only detects presence, not behavior

## Facets
- artifact type: application
- maturity: abandoned
- function: testing, e2e-testing, developer-tools
- domain: web-development, browser-extensions, developer-tools, testing
- platform: browser
- tags: html5, browser-compatibility, web-standards, feature-detection, benchmark, web-server, javascript

## Member repositories
- WebPlatformTest/HTML5test (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-09-03T02:15:08.526842+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:12:25.031532+00:00, confidence not recorded.
  - readme: https://github.com/WebPlatformTest/HTML5test (fetched 2026-09-03T02:15:08.526842+00:00, sha 27e8ff525967)
  - homepage: https://html5test.com (fetched 2026-08-29T13:12:29.992007+00:00, sha 7a2e1bcddb05)
  - site_page: https://html5test.com/about.html (fetched 2026-08-29T13:12:30.001510+00:00, sha fc5e15bfb8ec)
- Data as of 2026-08-30T08:39:29.467469+00:00.