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Fix Trailing Commas in JSON

Remove trailing commas and repair common JSON syntax issues in your browser.

Convert JSON-like data that fails because of trailing commas into valid JSON without editing every object or array manually.
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Data Tools

Free  ·  Local browser processing  ·  No signup

What this tool helps you do

Convert JSON-like data that fails because of trailing commas into valid JSON without editing every object or array manually.

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

  • Fixing config files
  • Cleaning copied code examples
  • Repairing generated payloads

Example

Input: {"name":"Ana","age":30,}

Expected result: { "name": "Ana", "age": 30 }

Useful tip

Trailing commas are allowed in some programming languages but not in strict JSON.

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?

Fixing config files, cleaning copied code examples, or repairing generated payloads.