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JSON Formatter & Validator

Format, validate and minify JSON. Clear error messages with line positions. Runs fully in your browser — safe for sensitive data.

Ctrl+Enter to run  ·  Ctrl+K to switch tools  ·  Recent button shows input history

Let AI do the hard part. Fix broken HTML, convert to email-safe HTML, or clean up any markup in one click — 3 free AI runs per day, no account needed.

Try the AI HTML Fixer

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