JSON Validator
Validate JSON syntax and get detailed error messages.
Paste JSON to validate it instantly. Get detailed error messages with line and column numbers. Everything runs in your browser.
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What is JSON Validator?
JSON Validator checks if your JSON is syntactically correct and highlights errors with precise locations. Unlike parsing that just says "invalid", this tool shows exactly where the problem is.
When Should You Use This Tool?
Use this tool when debugging API responses, config files, or any JSON data that isn't working as expected.
How to Use JSON Validator
- 1Paste your JSON into the input area.
- 2See validation result instantly.
- 3If invalid, see the exact error location.
- 4Fix the error and re-validate.
How Does This Tool Work?
This tool uses JSON.parse() with error position detection to identify exactly where syntax errors occur. All processing is done locally.
Privacy Note: Runs entirely in your browser. Your data never leaves your device. No file uploads to any server.
Common Use Cases
Developers
Debug malformed JSON from APIs or logs.
DevOps
Validate config files before deployment.