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JSON formatter
Paste JSON from an API, SEO export, or MCP payload. Spot syntax errors and copy a readable or minified result.
No uploads. Input is processed only in your browser.Maximum input: 1,000,000 characters
How it works
Use the example first, then replace it with your own input. Check the result before you copy or download it.
- 01
Paste a complete JSON value into the input pane.
- 02
Choose Format JSON for a two-space layout or Minify for a compact representation.
- 03
Read any syntax error, check the output, and copy the result.
What the tool changes
- JSON objects, arrays, strings, numbers, booleans, and null
- Readable two-space formatting
- Whitespace removal through parsing and serialization
- API payloads, SEO export fragments, and JSON-RPC envelopes
What to check yourself
- It checks JSON syntax, not a product-specific schema or business rule.
- Formatting cannot restore comments because JSON does not include comments.
- The page accepts up to 1,000,000 characters and does not upload the input.
Technical reference
These are the specifications used for the tool's rules and terminology.