web-platform-tests

Cross-browser test suite and CLI for testing web platform spec compliance.

PlatformWebfree

web-platform-tests is a shared, cross-browser test suite and CLI for verifying that browser implementations match web platform specifications like HTML, DOM, and CSS. It's built for browser engine developers and standards authors who need consistent, cross-browser interoperability testing, with public dashboards for tracking results.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of web-platform-tests - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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