JSON Validator
// Validate and lint JSON with detailed error messages
#About JSON Validator
Free online JSON validator and linter. Check if your JSON is valid and get precise error locations with helpful messages. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
#FAQ
How do I validate JSON? ▾
Paste your JSON into the input field. The validator will instantly check the syntax and show any errors with line numbers and descriptions.
</> Embed this tool ▾
Copy this code to embed the tool on your website. Adjust the height to fit your layout.
<iframe src="https://www.browserutils.dev/embed/json-validator" width="100%" height="500" frameborder="0" title="JSON Validator"></iframe>