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Blocks automated requests, so health scans flag it rather than kill it.

Compare image codecs side by side and compress without uploading anything.

Local-first Markdown notes with backlinks and a large plugin ecosystem.

Anthropic's assistant, for writing, analysis and working through code.

The reference for HTML, CSS and JavaScript that actually stays current.

Browser support tables for web platform features, updated continuously.

Regular expression tester with a live explanation of every token.

Hand-drawn-feel whiteboard for diagrams, with no account required.

Collaborative interface design that runs entirely in the browser.