Paste messy JSON and get a clean, indented, syntax-highlighted, validated result instantly.
Is my JSON sent to a server?
Never. All formatting and validation happens locally in your browser.
Can it fix invalid JSON?
It highlights the exact error location so you can fix syntax issues quickly.
JSON Formatter
Input
Formatted output
1{2 "name": "Ada Lovelace",3 "born": 1815,4 "skills": [5 "mathematics",6 "programming"7 ],8 "active": true9}