JSONToTable

JSON Fixer & Repair Tool

Fix malformed JSON, repair syntax errors, and validate JSON structure

Enter Invalid JSON
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🔧 Enter broken JSON to fix
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How to Fix JSON Errors - Step by Step Guide

Step 1

Input Your Broken JSON

Got broken JSON that's causing errors? Let's fix it! Paste your problematic JSON data:

•
Paste broken JSON: Copy error-prone JSON from your API responses, config files, or databases
•
Fix common errors: Automatically repairs comma errors, bracket errors, quote issues, and other syntax problems
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Try sample JSON: Click "Sample" to load valid JSON and see the tool in action 🔧

Note: For very large JSON files, the server may not be able to handle the processing due to the complex algorithm required for error detection and fixing. Please use smaller JSON chunks for best results.

Example: Common JSON Errors

Here are typical JSON syntax errors that break parsing:

{
  "name": "Sarah Chen",
  "email": "sarah@company.com",
  "age": 28,
  "skills": ["JavaScript", "Python", "React",], 
  "active": true,
  "projects": {
    "current": "Website Redesign"
    "completed": "Mobile App" 
  }
  "department": 'Engineering' 
}
Step 2

Review Error Detection

The tool automatically scans your JSON and identifies all syntax errors with precise locations and descriptions:

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Error highlighting: See exactly where each syntax error occurs in your JSON
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Detailed descriptions: Get clear explanations of what's wrong and why it breaks parsing
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Line numbers: Pinpoint exact locations of errors for easy identification
Step 3

Apply Fixes and Validate

Use the auto-fix feature or manually correct errors, then validate your fixed JSON:

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Auto-fix: Automatically correct common errors like trailing commas and missing quotes
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Manual editing: Make custom corrections with real-time error checking
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Validation: Confirm your JSON is now valid and ready to use

Example: Before and After JSON Fixing

Here's how the JSON fixer transforms broken JSON into valid, properly formatted data:

❌ Broken JSON (Before)

{
  "user": "Sarah Chen",
  "email": "john@example.com",
  "age": 30,
  "skills": ["React", "Node.js",], // Error: trailing comma
  "active": true,
  "profile": {
    "bio": "Developer"
    "location": "NYC" // Error: missing comma
  }
  "role": 'admin' // Error: single quotes
}

✅ Fixed JSON (After)

{
  "user": "Sarah Chen",
  "email": "john@example.com",
  "age": 30,
  "skills": ["React", "Node.js"], // Fixed: trailing comma removed
  "active": true,
  "profile": {
    "bio": "Developer",
    "location": "NYC" // Fixed: comma added
  },
  "role": "admin" // Fixed: double quotes used
}

✅ Result: The JSON is now valid and can be parsed by any JSON parser without errors. All syntax issues have been resolved while preserving the original data structure and values.

Frequently Asked Questions

What JSON errors can the fixer repair automatically?

The fixer handles common issues like missing commas, trailing commas, unquoted property names, single quotes instead of double quotes, and unmatched brackets. It provides smart suggestions for complex syntax errors.

Is it safe to use the auto-fix feature?

Yes! The fixer only makes safe corrections that don't change data meaning. It shows you exactly what will be fixed before applying changes, so you can review and approve modifications to your JSON.

Can the fixer handle complex nested JSON errors?

Absolutely! The fixer analyzes deeply nested structures and identifies errors at any level. It provides precise line numbers and context for each issue, making it easy to fix complex JSON files.

What if my JSON has multiple syntax errors?

The fixer identifies and lists all syntax errors in order of priority. You can fix them one by one or use the batch fix feature to correct multiple issues simultaneously with detailed change previews.

Does the fixer work with large JSON files?

Yes! The fixer efficiently processes large JSON files and provides fast error detection and correction. It handles files with thousands of lines while maintaining accuracy and performance. Once fixed, you can format the JSON or convert it to a table for analysis.

Is the JSON fixer free to use?

Yes, completely free with unlimited usage, no file size restrictions, and no registration required. Fix as many JSON files as needed with full error detection and auto-correction features at no cost.