Free cURL Tester & API Sandbox
Paste a real curl command, run it against any public URL, and inspect the full HTTP response — status, headers, body, and timing. A real sandbox for testing APIs and debugging HTTP requests.
⚠️ Good to know: Requests are executed server-side through an SSRF-safe proxy. Private/internal addresses (127.x, 10.x, 169.254.x, metadata endpoints, etc.) are blocked. Response bodies are capped at ~1 MB and requests time out after 10s. Rate-limited per IP.
cURL Command
Parsed request
Method: GET
URL: —
Headers:
—
Body:
—
Response
Running request…
Run a command to see the response here.
Response body
⚠ Response truncated at ~1 MB.
—
About the cURL Tester
cURL is a command-line tool for transferring data with URLs. It supports dozens of protocols and is the de-facto standard for testing HTTP APIs, debugging webhooks, and inspecting server responses. This sandbox lets you run real curl commands from your browser without installing anything.
Common curl flags this tool understands
-X, --request— HTTP method (GET, POST, PUT, DELETE, …)-H, --header— request header (repeatable)-d, --data— request body (also sets POST by default)-I— fetch headers only (HEAD)-L— follow redirects (also a toggle above)
Exotic flags are ignored. The parser covers the common ~90% of real-world curl commands — if something is dropped, it's shown in the parsed-request panel.