📋 Sample JSON
Load a small object and check the validation report.
JSON InputJSON
Paste or drag & drop a .json file
0 chars · 1 lineWaiting for input
Validation Results
Paste JSON to see validation report
📚 Common JSON errors
- • Trailing commas
- • Single quotes instead of double quotes
- • Unquoted keys and missing quotes
🔗 Related tools
About JSON validation
JSON follows strict syntax rules: strings and property names require double quotes, trailing commas are not allowed, and comments are not part of the format. TEO ToolKit checks syntax in your browser and can validate structure.
✓ Real-time syntax validation · ✓ JSON Schema support · ✓ Line/column precision · ✓ Runs in-browser · ✓ Free forever