HTTP Request Builder
Build HTTP requests safely and generate cURL and fetch snippets without turning the site into an open proxy.
What is HTTP Request Builder?
Generate a request preview, POSIX-shell cURL command and JavaScript fetch snippet from method, URL, headers and body. The page does not send the request or proxy it through a server.
How to use HTTP Request Builder?
Step 1
Enter method, URL, headers, and optional body.
Step 2
Review the request preview, cURL command, and fetch snippet.
Step 3
Copy the snippet into your terminal or codebase after redacting secrets.
Example input / output
Use GET https://api.example.com/users with {"Accept":"application/json"}. For POST, add an explicit content type and a redacted body, then compare the resulting code with the API contract.
Example input
GET https://api.example.com/users with Accept: application/jsonCheck the result
- Generated commands can expose bearer tokens in shell history if you paste real Authorization headers.
- CORS behavior in browsers may differ from server-side clients and curl.
Practical developer examples
Check shell quoting
The cURL output targets sh/bash. Single quotes and command-substitution characters inside values must remain literal, and PowerShell/cmd require different quoting.
Validate body and headers
Headers must be an object of string values. Browser fetch cannot send a GET/HEAD body, and invalid header JSON must not silently become an empty header set.
Common developer use cases
Generated snippets are not executed. CORS, credentials, TLS, timeouts and response handling still depend on the client environment.
Common issues
FAQ
Can this bypass browser CORS?
No. It generates code, not a proxy.
Which shell is supported by the cURL example?
POSIX sh/bash. Adapt quoting explicitly for PowerShell or cmd.exe.