OpenAPI Validator
// Validate OpenAPI specifications for errors
OpenAPI Spec (JSON / YAML)
Validation Results
Paste an OpenAPI spec to validate...
#About OpenAPI Validator
Free online OpenAPI validator. Paste an OpenAPI 3.x specification in JSON or YAML and check for structural errors, missing fields, and common issues. 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
What OpenAPI versions are supported? ▾
The validator supports OpenAPI 3.x specifications. It checks for required fields (openapi, info, paths), validates path structures, and reports missing descriptions and response codes.
Does it accept YAML format? ▾
Yes, paste your spec in either JSON or YAML format. The validator auto-detects the format and parses accordingly.
</> 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/openapi-validator" width="100%" height="500" frameborder="0" title="OpenAPI Validator"></iframe>