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KitLino
Free · No signup · Private

JSON Formatter / Base64 / URL / JWT

Free JSON formatter & validator — paste minified API response, get readable tree and exact error line in seconds. 100% private.

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Everything runs locally in your browser — pasted API responses, tokens, and files are never uploaded, stored, or logged. JWT decoding never verifies signatures; that requires the secret.

What you can do

  • Beautify and validate with line-accurate errors
  • Minify for production, encode/decode Base64 + URL in one place
  • Decode JWT to see user and expiry — nothing leaves your browser

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