API development requires specialized tools for authentication, testing, and documentation. Our API tools streamline the full workflow from generating and verifying JWT tokens to building curl commands, converting request formats, and exploring OpenAPI specifications.

Whether you are debugging authentication issues, converting curl commands to fetch calls, or inspecting HTTP headers, these tools provide instant results with complete privacy. All processing happens in your browser.

Frequently Asked Questions

What API development tasks can these tools help with?

They cover authentication (JWT), request building (curl), format conversion (curl to fetch), API documentation (OpenAPI), and debugging (HTTP headers).

Are JWT tokens and API keys safe to use here?

Yes. Processing is fully client-side with no server round trips, so your sensitive credentials stay on your device.

What JWT algorithms are supported?

JWT Generator and Verifier support HS256, HS384, HS512, RS256, RS384, and RS512 with configurable claims.

Can I convert curl commands from API docs?

Yes. The converter transforms curl commands into equivalent JavaScript fetch code, including method, headers, and body.

Why use the OpenAPI viewer?

It parses OpenAPI specs and renders endpoints, parameters, schemas, and auth requirements in an easier exploration format.