JSON Validator checks JSON as you type. Valid documents show root type and key counts. Invalid documents show the error message, line, column, and a snippet of the failing line.
JSON Validator
JSON Validator Free
Paste JSON and get instant valid/invalid feedback with line and column errors - fully local.
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What is this?
How it works
1. Paste or type JSON.
2. Validation runs automatically with a short debounce.
3. See a green success or red error panel.
4. Optionally format valid JSON in one click.
Features
- Live validation while typing
- Line and column error location
- Root type and key stats
- One-click format for valid JSON
Benefits
Catch broken JSON before it breaks your app or API request.
Trust & privacy
Your JSON is processed only in your browser. Studix does not upload or store it for this tool.
Frequently asked questions
No. Validation runs entirely in your browser.
No. Validation runs automatically as you type.