Free JSON Fixer & Repair Tool - Fix Broken JSON Online Instantly

Automatically Repair Malformed JSON Data Online

JSON Fixer

Automatically Repair Broken JSON - Fix Syntax Errors Instantly

Repaired JSON

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Fix Broken JSON

Automatically repair malformed JSON - fix missing quotes, trailing commas, unquoted keys, and more

Try the JSON fixer with sample broken data

Common Issues We Fix:

Single Quotes{'name': 'John'}

Trailing Commas{"a": 1,}

Unquoted Keys{name: "John"}

Python ValuesTrue, False, None

How to Fix Broken JSON - Step by Step Guide

Automatically repair malformed JSON with missing quotes, trailing commas, and syntax errors in seconds

1

Step 1 - Paste Your Broken JSON

Copy your malformed JSON and paste it into the editor. Our fixer handles common issues like missing quotes, trailing commas, single quotes, unquoted keys, and Python-style values.

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Smart Detection: Automatically detects syntax errors, missing commas, unquoted keys, and invalid values

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Flexible Input: Paste from any source - code editors, APIs, logs, or configuration files

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Instant Analysis: Real-time parsing shows exactly what needs fixing before repair

Broken JSON Input

{
  name: 'John Doe'
  age: 30,
  email: "[email protected]",
  address: {
    street: "123 Main St"
    city: 'New York',
    country: "USA",
  },
  hobbies: ['reading', "coding", 'gaming',],
  isActive: True,
  metadata: undefined
}

⚠️6 issues detected

2

Step 2 - Auto-Repair JSON Issues

Watch as the fixer automatically repairs all detected issues. Single quotes become double quotes, trailing commas disappear, unquoted keys get wrapped, and Python values convert to JSON standards.

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Auto-Fix Engine: Powered by jsonrepair library - handles edge cases that break standard parsers

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Issue Report: See exactly what was fixed with detailed repair summary

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Validation Check: Repaired JSON is validated to ensure it's 100% valid

Auto Repair→Fixed

Repaired JSON Output

{
  "name": "John Doe",
  "age": 30,
  "email": "[email protected]",
  "address": {
    "street": "123 Main St",
    "city": "New York",
    "country": "USA"
  },
  "hobbies": [
    "reading",
    "coding",
    "gaming"
  ],
  "isActive": true,
  "metadata": null
}

✅All issues fixed

3

Step 3 - Copy or Download Fixed JSON

Export your repaired JSON in the format you need. Copy to clipboard for quick use, or download as a properly formatted JSON file ready for production.

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One-Click Copy: Copy repaired JSON to clipboard instantly - formatted or minified

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Download File: Save as .json file with proper encoding and formatting

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Minify Option: Compress to single line for APIs, storage, or production use

⚡Export repaired JSON - formatted or minified

3 Options

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Download JSON

Save repaired .json file

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Minify JSON

Compress for production

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Copy JSON

Copy to clipboard

💡Export repaired JSON instantly - perfect for fixing API responses, config files, and data imports

JSON Fixer FAQs

Get answers to common questions about fixing and repairing broken JSON

What is a JSON Fixer?

A JSON Fixer is a tool that automatically repairs broken or malformed JSON data. It detects and fixes common issues like missing quotes, trailing commas, unquoted keys, single quotes, and invalid values - making your JSON valid again without manual editing.

What common JSON errors can this tool fix?

Our JSON fixer handles many common issues: single quotes instead of double quotes, trailing commas in arrays and objects, unquoted property keys, missing commas between elements, Python-style values (True/False/None), undefined values, JavaScript comments, and unbalanced brackets.

How does the JSON repair work?

The tool uses the jsonrepair library - a robust parser that understands common JSON mistakes. It analyzes your input character by character, identifies syntax issues, and applies intelligent fixes while preserving your data structure and values.

Can I fix JSON from API responses?

Yes! Paste any broken JSON from API responses, log files, or code snippets. The fixer works with any JSON source and automatically repairs issues that prevent parsing. Perfect for debugging API integrations.

Is my data secure?

Absolutely! All JSON processing happens entirely in your browser - no data is sent to any server. Your JSON never leaves your computer, ensuring complete privacy for sensitive data like API keys or personal information.

Can I download the fixed JSON?

Yes! After repairing, you can download the fixed JSON as a properly formatted .json file, copy it to your clipboard, or minify it for production use. The download includes proper UTF-8 encoding and formatting.

JSON TOOLS

Format, validate and process JSON

EXPORT & SHARE

Export to other popular formats

IMPORT TO JSON

Convert to JSON from other types

CODE GENERATION

Generate code from JSON data

JSON to TypeScript