JSON formatter
Indent, minify and validate your JSON.
- Instant
- Free
- Private (processed locally)
- No sign-up
Read and clean up your JSON in seconds
JSON is the most common data-exchange format (APIs, configs, exports). But single-line JSON is unreadable, and a misplaced comma breaks everything. This tool re-indents, validates and minifies it instantly.
How does it work?
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Paste your JSON
From an API, a config file or an export.
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Format or minify
Choose the indentation, then beautify to read or minify to shrink.
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Copy the result
A button copies the cleaned JSON to the clipboard.
If there is an error, the message helps you locate the missing comma, brace or quote.
Frequently asked questions
What is JSON formatting for?
Formatting (or “beautify”) adds line breaks and indentation to make compact JSON readable. Minifying does the opposite: it strips whitespace to reduce file size.
How do I know if my JSON is valid?
Paste it and click “Format”: if the syntax is correct, the JSON is re-indented and marked valid. Otherwise, the error message points to the exact problem.
Is my JSON data sent to a server?
No. Processing uses your browser’s native JSON engine. No data is transmitted, which is essential for sensitive data.
Can I choose the indentation?
Yes: 2 spaces, 4 spaces or tab. Pick the style your project expects before formatting.