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JSON Repair Tool
JSON Repair ToolReady
Indent
Input Malformed JSON
0 lines · 0 B
Raw input remains untouched until you click Format
Repaired Valid JSON OutputEditable
0 lines · 0 B
Ready to copy (⌘⇧C) or download (⌘S)

JSON Repair & Syntax Fixer

Repair broken, unquoted, or malformed JSON online. Automatically fix trailing commas, single quotes, and missing brackets directly in your browser.

Fixes single quotes to double quotes
Encloses unquoted keys
Removes trailing commas
Replaces True/False/None
Step-by-Step Guide

How to Use JSON Repair Tool Online

Follow these quick steps to process your data online directly in your browser with zero latency and 100% privacy.

1
Step 1Scans input for unquoted JavaScript object property keys.
2
Step 2Replaces single-quoted strings with properly escaped double quotes.
3
Step 3Removes trailing commas from arrays and objects.
4
Step 4Normalizes Python / JS constants (True, False, None) to valid JSON literals.
Demonstration

Example Input & Output

Corrects single quotes, quotes object keys, strips trailing commas, and fixes Python boolean constants to produce RFC 8259 valid JSON.

Input Malformed JSON
{
  name: 'Alex',
  skills: ['TypeScript', 'Astro',],
  active: True,
  notes: None,
}
Repaired Valid JSON Output
{
  "name": "Alex",
  "skills": [
    "TypeScript",
    "Astro"
  ],
  "active": true,
  "notes": null
}
Applications

Common Use Cases

Fixing Python Dict / JS Object Dumps

Convert Python dictionaries or JavaScript object literals into valid JSON.

Knowledge

Frequently Asked Questions

What syntax errors can JSON repair fix?

It automatically fixes single quotes, unquoted keys, trailing commas, comments, and Python constants.

Workflow

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