JSON Tools

JSON Validator

Check JSON syntax and locate common errors.

JSON to validate

Privacy-first processing

Your data stays private. All processing happens locally in your browser. Nothing is uploaded to our servers.

Built for real work

Why use JSON Validator?

Confirm whether a JSON document parses correctly without changing its contents.

Success confirmation without rewriting data

Useful line and column hints

Valid and invalid samples

{"project":"DevTools Hub","private":true,"features":["fast","local"]}

Is JSON Validator free?

Yes. JSON Validator is free to use and requires no account.

Does JSON Validator upload my document?

No. The processing in this tool runs in your browser and does not send the document to our servers.

Can I use JSON Validator on mobile?

Yes. The workspace adapts to modern mobile, tablet, and desktop browsers.

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