JSON Repair is a free online tool. Analyze JSON errors and auto-repair common syntax issues No signup required - use it directly in your browser.

Yes, all tools provided by WebTools are completely free to use with no signup required.

Absolutely safe. All data processing happens locally in your browser. Nothing is uploaded to any server, ensuring your privacy is fully protected.

Do I need to install software to use JSON Repair?

No installation needed. All tools run in your browser - just open the page and start using them immediately.

What kinds of JSON errors can this tool fix?

This tool can fix missing commas, trailing commas, unclosed brackets, single quotes instead of double quotes, unquoted object keys, missing closing braces, concatenated JSON objects, and comments inside JSON.

How is JSON Repair different from JSON Formatter?

JSON Formatter validates and pretty-prints valid JSON, but cannot fix broken JSON. JSON Repair automatically corrects syntax errors in malformed JSON so that it becomes valid.

Will the repair change my data values?

No. The repair process only fixes structural and syntax issues. It does not modify the actual data values, strings, numbers, or booleans in your JSON.

Can this tool handle large JSON files?

Yes. The repair tool processes data entirely in your browser and can handle files of several megabytes.

Is my JSON data secure?

Yes. All JSON repair processing happens entirely in your browser. Your data is never sent to any server, stored, or logged.

Free JSON Repair Tool Online - Fix Broken JSON Errors Instantly

What is JSON Repair?

JSON Repair is a free online tool that helps you fix broken, malformed, or corrupted JSON data. Whether you're dealing with missing commas, unclosed brackets, unquoted keys, trailing commas, or other common JSON errors, this tool automatically detects and repairs them — no signup, no installation, completely private.

Auto-detect and fix missing commas between elements
Repair unclosed or mismatched brackets and braces
Add missing quotes around object keys and string values
Remove trailing commas that cause parse errors
Fix single quotes to double quotes for valid JSON
Handle concatenated JSON objects and repair them individually
All processing happens locally in your browser — your data never leaves your device

How to Use JSON Repair

1
Paste your broken JSON
Copy your malformed or corrupted JSON data and paste it into the input box.
2
Click Repair
Press the Repair button. The tool automatically scans for common errors and applies fixes.
3
Review the result
The repaired JSON appears in the output panel. Check the output to ensure it matches your intended structure.
4
Copy the fixed JSON
Click the copy icon to copy the repaired JSON to your clipboard.

Frequently Asked Questions

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