JSON Validator & Linter
Check syntax and flag broken brackets or commas.
✏️ Sketching your tool…
About JSON Validator & Linter
Validate JSON and get a readable error message, plus pretty/minified output.
🔒 This tool runs entirely in your browser. Nothing is uploaded or stored.
Frequently Asked Questions about JSON Validator & Linter
How do I use the JSON Validator & Linter?
Open the JSON Validator & Linter and use the controls in the workspace below: check syntax and flag broken brackets or commas. Results appear instantly in your browser, with nothing to install, sign up for, or pay for.
Is the JSON Validator & Linter free?
Yes. The JSON Validator & Linter is completely free, like every tool in the PrimeFreeTools library. There are no accounts, subscriptions, or usage limits.
Does the JSON Validator & Linter store or share my data?
No. The JSON Validator & Linter runs with JavaScript in your browser, so what you enter never leaves your device and nothing is stored on a server.
What can I use the JSON Validator & Linter for?
Validate JSON and get a readable error message, plus pretty/minified output. You will find it grouped under Developer Tools together with 75 other free tools on the PrimeFreeTools homepage.