JSON Formatter & Validator

Beautify, format, and validate raw JSON strings completely in your browser. Features syntax error highlight and minify options with 100% privacy.

Raw JSON Input

Paste the JSON string you want to format or validate.

Indent

Formatted Output

The formatted result will be displayed here.

Formatted output will be displayed here without syntax errors

Inputs are processed fully locally in your browser and never sent to any server.

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Client-Side Secure Execution

This tool executes entirely in your browser sandbox. None of your input strings, files, or configurations are uploaded to any external server.

ZeroTools Guarantees Absolute Privacy & Local Safety

All tools on our site, including the JSON Formatter & Validator, run strictly within your browser (local environment). Your private data, files, and inputs are never sent to any external server or network. Zero registration, fully offline-ready.

Frequently Asked Questions (FAQ)

The formatter will highlight the exact line and position of the syntax error with a helpful message, allowing you to fix it instantly.

Yes, you can copy the formatted JSON and use our YAML to JSON Converter or JSON to XML Converter to convert between formats locally.

No. Since all operations run locally in your browser memory, there are no artificial upload limit restrictions.

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