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JSON Trailing Comma Repair Tool

Automatically remove trailing commas from objects and arrays. Fix the 'Unexpected token ]' or 'Unexpected token }' error instantly.

Problem Example

This invalid JSON will cause parsing errors

{
  "name": "Project",
  "tags": ["SEO", "Ads",],
  "status": "active",
}

Why This Happens

Standard JSON does not allow a comma after the last item in a list or object. This often happens when copy-pasting code or using certain programming languages like Python or JavaScript that allow them.

How to Fix

Use our online tool to automatically repair this issue

Copy your broken JSON
Paste it into the editor below
The tool will automatically detect and fix the issue
Download or copy the repaired JSON

Common Causes

This JSON error typically occurs when:

Copying data from different programming languages
Manual data entry without proper validation
Using AI tools that generate non-standard JSON
Exporting from applications with loose formatting

About JSON Standard

JSON (JavaScript Object Notation) is a strict data interchange format. Unlike JavaScript objects, JSON requires:

All keys must be enclosed in double quotes
String values must use double quotes (not single quotes)
No trailing commas after the last item
No comments allowed
Proper escaping of special characters