curl Command Builder - Build curl Commands Online
curl Command Builder
Build a Shell-Escaped curl Command
Understanding curl Commands
Testing APIs from the Terminal
curl is the standard command-line tool for making HTTP requests — useful for quick API testing without opening a full REST client.
Shell Quoting Matters
URLs and header values often contain characters (spaces, quotes, ampersands) that a shell would otherwise misinterpret — this tool wraps every value in properly escaped single quotes.
-X, -H, and -d
-X sets the HTTP method, -H adds a header (repeatable), and -d sends a request body (which also implies POST if no method is set).
Local Processing
The command is assembled entirely in your browser — nothing you enter is sent to a server.
A Note on Secrets
If you paste an API key or auth token into a header value, remember it will appear in plain text in the generated command — avoid pasting the finished command into shared chat logs, tickets, or shell history you don't control.
Key Takeaways
- POSIX-Safe Quoting: Every value is wrapped in single quotes with embedded quotes escaped, safe for bash/zsh/sh.
- Multiple Headers: Add as many
-Hheader rows as your request needs. - Client-Side Only: Your request details are never sent anywhere.