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JSON Formatter and Validator

Format, prettify, validate, and minify JSON directly in your browser with instant syntax validation and zero data transmission.

This tool runs in your browser.

Your JSON is processed locally in this browser.

How to use

  1. 01Paste your raw JSON string or data payload into the input editor.
  2. 02Click 'Format JSON' to prettify indentation, or click 'Minify' to remove whitespace.
  3. 03Check syntax error indicators if invalid, or copy the formatted result with one click.

FAQ

Is it safe to paste confidential API payloads or credentials into this formatter?

Yes. Parsing and formatting run purely inside your web browser. No requests or payloads are transmitted over the network to external servers.

How does the tool assist with syntax error debugging?

When invalid JSON is detected, the parser provides explicit error messages pointing out missing commas, unclosed quotes, or unexpected tokens.

Does the minifier remove comments or trailing commas?

Standard JSON specifications do not support comments or trailing commas. The tool checks for strict JSON compliance and cleans spacing.