Tools

Developer Tools

Developer Tools that run in your browser — no account, no upload.

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JSON Formatter
Format, validate, minify, and explore JSON in a tree — private, in your browser.
JWT Decoder
Decode JSON Web Token headers and payloads instantly for debugging auth flows.
Diff Checker
Compare two texts side-by-side or unified — line and word highlights, private in your browser.
HTML to JSX Converter
Convert HTML snippets to React JSX — className, styles, void tags, and warnings — in your browser.