Work with code, data, and APIs from the browser
When debugging an integration, a small utility can speed up the review of a response or structure. This set helps with formatting, validation, and inspection, but does not replace automated tests or security reviews in the project.
Complete the task step by step
- 1
Isolate the fragment you want to review
Remove secrets, active tokens, and personal data before pasting code or responses into a tool.
Open Format HTML ↗ - 2
Order and validate the structure
Use the compatible formatter or validator and review the indicated errors.
Open Validate JSON Schema ↗ - 3
Test expressions and values.
Verify regex patterns or inspect the readable part of a JWT. Remember that decoding does not verify the signature.
Open Regular expression tester ↗ - 4
Consult the API and verify.
Explore documentation or a public API and validate the response in your real environment before integrating it.
Open Explore a public API ↗
Common questions
Is it safe to paste a real JWT?
No. Use test tokens or fictional data; a JWT may contain sensitive information or active credentials.
Does the browser test any API?
No. It depends on whether the endpoint is accessible from the browser and its CORS policies, authentication, and limits.