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JSON Formatter and Validator Online
Drag and drop a .json file here, or paste JSON manually.
Format: Minified
Result
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How it works
Format, validate and minify JSON directly in your browser. Paste raw JSON, make it readable, catch parsing errors and copy the result without sending data to external servers.
Practical examples
Format a JSON API response
Paste raw JSON returned by an API to make it readable, inspect nested objects and arrays, and copy the formatted output.
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Validate JSON before using it in code
Catch common JSON errors such as missing commas, invalid brackets, unclosed strings or malformed objects before using the data in your app.
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Minify JSON for HTTP payloads and config files
Switch to Minified view when you need compact JSON for API requests, environment variables, configuration files or test fixtures.
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FAQ
Is the JSON sent to a server?
No. Formatting, validation and minification happen locally in your browser.
Can this tool validate invalid JSON?
Yes. If the JSON is malformed, the tool shows a parsing error so you can quickly fix the problem.
Can I minify JSON?
Yes. Use the Minified view to create compact JSON for API payloads, configuration files or environment variables.
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