Our JSON Fixer Online is a free tool that automatically detects and repairs broken JSON. Fix syntax errors, trailing commas, missing quotes, and more - all in seconds.
Features
Automatic Error Detection
Detects all common JSON errors instantly
Visual Error Highlighting
See exactly where errors occur with red line highlighting
100% Free
No signup, no limits, completely free
Privacy-Focused
All processing happens in your browser
Fix JSON Instantly
Paste your broken JSON and get it fixed in seconds. No signup required.