Paste your JSON
Add an object, array, string, number, boolean, or null value to the editor.
Free browser-based developer tool
JSON Formatter
Paste JSON, check its syntax, and turn it into a clean result you can copy or download. You can also minify valid JSON or sort object keys.
Your JSON stays in this browser tab- No account required
- No content upload
- Works after the page loads
Input JSON
Press Tab to insert the selected indentation. Press Escape, then Tab, to leave the editor.
0 characters0 B
Formatted result
Your valid JSON result will appear here.
0 characters0 B
Readable, valid output
Format and validate JSON locally
Use the JSON Formatter to turn compact or hard-to-read JSON into an indented result. The same browser tool validates syntax, minifies valid JSON, and sorts object keys without sending your input to a conversion API.
How the JSON formatter works
Choose one action
Format, validate, minify, or sort keys. Invalid input stays available so you can fix it.
Use the result
Copy the plain result or download a JSON file. Line numbers are never included.
Clear answers
JSON formatting FAQ
Other developer tools
Other developer tools
Open another local browser utility when your next task changes.