curl Command Builder
Compose complete curl commands with headers, auth and body — no syntax guessing.
Runs 100% in your browser — nothing is ever uploaded.
What is curl Builder?
curl is the universal tool for testing APIs, but remembering every flag is hard. This free builder assembles the full command for you: pick the HTTP method, add headers and a JSON body, choose bearer-token or basic auth, and toggle common flags like -L for redirects, -s for silent mode, -k for self-signed certificates and -o for saving output. The command updates live as a readable multi-line version with backslash continuations, ready to paste into any terminal.
How to use curl Builder
- Open the tool — no signup, no upload, everything runs in your browser.
- Fill in the options in the form; sensible defaults are pre-selected.
- The curl command builder output updates instantly with every change you make.
- Copy the result or download it as a ready-to-use file.
Frequently asked questions
Is this curl command builder free to use?
Yes — this curl command builder is completely free with no signup, no limits, and no watermarks. Use it as often as you like.
How do I send a JSON POST request with curl?
Select POST as the method and JSON as the content type, then paste your payload in the body field. The builder adds the Content-Type header and wraps the data in -d with proper quoting — the exact command most APIs expect.
Is my data private?
Completely. Everything you type stays in your browser — nothing is uploaded to any server, so commands, keys and data never leave your machine.
Do these tools touch my servers?
No. OpsForge tools are pure calculators and generators that run in your browser — they never connect to your infrastructure. You copy the result and apply it yourself.
Is the chmod calculator accurate for all systems?
Yes — octal permission notation is a POSIX standard, so the results apply identically on Linux, macOS and BSD.
Will more DevOps tools be added?
Yes — Dockerfile, docker-compose, nginx and CI config generators are on the roadmap. Everything will stay free and client-side.