QuirksMode - for all your browser quirks

www.quirksmode.org

Comprehensive, hand-tested browser compatibility tables and articles on CSS, JavaScript, and mobile web development.

why we picked it

A long-running independent resource by Peter-Paul Koch, documenting real-world browser rendering issues across desktop and mobile. The compatibility tables are built from manual testing, providing a trusted reference for front-end engineers. The blog and articles offer pragmatic insights into evolving web standards without vendor bias.

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language: EN
here since: July 2026