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Repair Invalid JSON Online

Repair common JSON errors such as single quotes, trailing commas, unquoted keys and Python-style literals.

Fix common machine-generated or hand-edited JSON mistakes automatically, then return valid formatted JSON.
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Data Tools

Free  ·  Local browser processing  ·  No signup

What this tool helps you do

Fix common machine-generated or hand-edited JSON mistakes automatically, then return valid formatted JSON.

This page uses the same tested Fix Invalid JSON engine as the main tool, but focuses on this specific task so you can get straight to the relevant workflow without hunting through a generic converter.

How to use it

  1. Paste or enter the content you want to process in the tool above.
  2. Use the preselected mode when this task has a specific mode, then click Run.
  3. Review the output, then copy or download it if the tool provides a download option.

Common uses

  • Cleaning AI-generated JSON
  • Repairing hand-edited config snippets
  • Fixing copied Python-like dictionaries

Example

Input: {name:'Ana', active:True,}

Expected result: { "name": "Ana", "active": true }

Useful tip

Automatic repair handles common patterns, not every ambiguous syntax error; always review the corrected result before using it in production.

Frequently asked questions

Is this tool free?

Yes. The tool is free to use, requires no account and runs directly in your browser.

Is my input uploaded to a server?

No. The tool processes the input locally in your browser. Your tool input is not sent to ToolboxApp servers.

When should I use Fix Invalid JSON?

Cleaning AI-generated JSON, repairing hand-edited config snippets, or fixing copied python-like dictionaries.