JSON Validator
Validate JSON syntax with detailed error messages and line numbers.
Examples
— click any card to loadFrequently Asked Questions
- Is JSON Validator free to use?
- Yes, JSON Validator is completely free. No account, no signup, and no payment is ever required.
- Does JSON Validator send my data to a server?
- No. JSON Validator runs entirely in your browser. Your data is never uploaded to any server — all processing happens locally on your device.
- Can I use JSON Validator offline?
- Yes. Once the page has loaded, JSON Validator works without an internet connection. No network requests are made when you use the tool.