# web-platform-tests/wpt

Test suites for Web platform specs — including WHATWG, W3C, and others

Repository: https://github.com/web-platform-tests/wpt
Canonical: https://ross.abutalabs.com/products/wpt
Homepage: https://web-platform-tests.org/
Language: HTML
License: NOASSERTION
License Family: other
Topics: testing, html, test-automation, browser, w3c, whatwg, test-runner, web-standards, javascript, dom, web-development, google-chrome, blink, gecko, firefox, microsoft-edge, safari, webkit, opera
Last push: 2026-08-26T22:48:05+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 5295, "days_push": 7, "days_rel": 6, "gap_med": 0, "n_releases_24m": 11978}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 6123, forks 3915 (observed 2026-08-28T04:09:36.220697+00:00)

## What it is
A large cross-browser test suite for the Web platform stack, covering specifications from WHATWG, W3C, and other standards bodies. It includes a Python-based test runner and infrastructure so tests can be run locally or in CI against all major browser engines.

## Use cases
- verify my browser implementation matches web standards
- run conformance tests for html and dom apis across browsers
- check cross-browser compatibility of web platform features
- write tests for a new web api specification
- compare browser test results on wpt.fyi
- test how firefox chrome and safari handle a css feature

## When to choose
- you are a browser vendor or engine developer validating spec compliance
- you need canonical cross-browser tests for a web platform feature
- you contribute to or implement WHATWG/W3C specifications

## When to avoid
- you need unit or end-to-end tests for your own web application
- you want a lightweight testing framework like Jest or Playwright for app code

## Facets
- artifact type: dataset
- maturity: active
- function: testing, e2e-testing, http-server, cli
- domain: web-development, testing, browser-extensions, web-design
- platform: windows, browser, python, cross-platform
- tags: web-platform, browser-compatibility, test-suite, w3c, whatwg, test-runner, conformance-testing, cross-browser, linux, macos

## Member repositories
- web-platform-tests/wpt (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:36.220697+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 2026-08-29T17:48:00.063158+00:00, confidence not recorded.
  - readme: https://github.com/web-platform-tests/wpt (fetched 2026-08-28T04:09:36.220697+00:00, sha 938fc03fa2cf)
  - homepage: https://web-platform-tests.org/ (fetched 2026-08-29T08:44:32.575398+00:00, sha 88cfc5b72d46)
  - site_page: https://web-platform-tests.org/running-tests/from-local-system.html (fetched 2026-08-29T08:44:32.585592+00:00, sha ba4158e85b62)
- Data as of 2026-08-30T08:39:29.467469+00:00.