web-platform-tests
Cross-browser test suites for Web platform specifications, ensuring interoperability across browser implementations.
What is web-platform-tests?
web-platform-tests (WPT) is a cross-browser test suite for the Web platform stack, covering specifications from WHATWG, W3C, and other standards bodies. It provides a shared set of tests that browser vendors use to ensure interoperability and compliance, and web developers use to verify feature support across browsers. The project aims to eliminate gaps between specifications and implementations, reducing the need for browser-specific workarounds.
Browser engineers, specification editors, and web developers who need to verify cross-browser compatibility and compliance with Web standards. It's also valuable for QA teams and open-source contributors focused on web platform testing.
Developers choose WPT because it's the de facto standard test suite for the Web platform, maintained collaboratively by browser vendors and the community. Its comprehensive coverage, public deployments (wpt.live, wpt.fyi), and tooling make it indispensable for ensuring interoperability and tracking browser implementation progress.
Overview
Test suites for Web platform specs — including WHATWG, W3C, and others
Use Cases
Best For
- Browser vendors verifying specification compliance and interoperability
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