Valid JSON text or a JSON file
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JSON Formatter & Validator
Validate, format, minify, and sort JSON without sending data away.
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No uploadsYour files stay on this device.
Local engineYour browser does the work.
Auto cleanupTemporary memory is released.
About this tool
Use json formatter & validator without uploading files
Validate, format, minify, and optionally sort JSON object keys directly in the browser.
Processing takes place in your browser tab. Temporary working data is released when you leave or reload the page.
Three steps
- Paste JSON or choose a local JSON file.
- Select indentation and key-sorting preferences.
- Validate and copy or download the formatted result.
Useful for
Common format json tasks
- Debugging API responses
- Reviewing configuration
- Preparing readable examples
Practical details
What to know before you start
Formatted or minified JSON
- Formatting does not change array order.
- Sorting object keys can create noisy diffs if another system preserves insertion order.
- Validation errors must be fixed before an output can be produced.