How it works
- Paste JSON or an escaped JSON string.
- Choose pretty print, minify, sort, escape or unescape.
- Copy or download the processed output.
Developer utility
JSON Formatter Online
Paste JSON, choose a processing mode and get readable or minified output without sending the content to a backend.
Result
Fill in the fields to see the result
The processed output appears here after you run the tool.
Generated output
Local JSON validation
The browser parses the input and reports syntax errors without requiring a server request.
Formatting modes
Pretty print improves readability, minify reduces size, sort keys helps comparisons, and escape modes help when JSON must be embedded as a string.
Debugging tip
If parsing fails, reduce the payload to the smallest failing sample and check quotes, commas and trailing characters.
Common use cases
- Read API responses more easily.
- Minify JSON before storing or sharing.
- Find parsing errors while debugging integrations.
Limitations
- Comments are not valid JSON.
- The tool does not automatically fix broken syntax.
- Sensitive payloads should be handled carefully even when processing is local.
Frequently asked questions
Does this support JSON with comments?
No. JSON comments are not part of the JSON standard.
Is my JSON uploaded?
No. The formatting runs in your browser.
Can I sort object keys?
Yes. Use the sort keys mode when you need a stable order for review.
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