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Free API Tester — Online Postman Alternative
Details
A Postman-style HTTP client in your browser. Build a request, send it through our CORS-free proxy, inspect the response, and copy ready-to-run cURL, fetch or Python code.
Collections
Sign in to save requests into collections and reuse them later.
Sign in to saveHistory
Your recent requests appear here.
How it works
Requests are relayed by our server, so APIs that block browser calls with CORS still work.
For safety we only allow public https:// endpoints — localhost, private networks and cloud metadata addresses are blocked. Requests time out after 15 seconds and responses are capped at 1 MB.
Frequently asked questions
Yes for quick online checks. Build requests, inspect responses and export cURL, fetch or Python without installing Postman. Sign in only if you want saved collections.
You get a visual request builder, auth helpers, pretty JSON and one-click code export. Our proxy also avoids CORS so third-party APIs respond the way servers actually respond.
No. Private and loopback addresses are blocked for SSRF safety. Use a local client or a public HTTPS tunnel for local services.
Auth values are used to build the request and are not persisted unless you explicitly save a request while signed in.