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JSON Fixer

Fix broken JSON and recover valid output.

How to Use This Tool

  1. Paste malformed JSON.
  2. Click Fix JSON.
  3. Copy the repaired output.

Learn More About JSON Fixer

Common JSON errors

Trailing commas, single quotes, and unquoted keys are frequent causes of invalid JSON. This tool fixes those quickly.

About JSON Fixer

JSON Fixer attempts to repair JSON-like input by correcting common mistakes. It's ideal when you receive malformed JSON from logs or user input.
Repair malformed JSON quickly.
Runs in browser
Yes
Fix types
Common errors
Output
Formatted JSON

Examples

Fix trailing commas

Repair JSON with a trailing comma.
Input
{'id':1,}
Output
{
  "id": 1
}

Features

Common fixes

Repairs single quotes, trailing commas, and unquoted keys.

Readable output

Returns formatted JSON when repair succeeds.

Client-side

All fixes happen locally in the browser.

Use Cases

  • Repair JSON from logs or exports.
  • Fix user-generated JSON input.
  • Quickly recover valid JSON for tools.

Frequently Asked Questions

Related Tools

Use the linter and formatter after fixing your JSON.