cURL Command Builder

Build cURL commands online from method, URL, headers and body — free cURL generator.

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About

About the cURL Command Builder

Builds a ready-to-run cURL command from an HTTP method, URL, headers and request body, with each piece correctly shell-quoted.

Developers use it to quickly assemble a test request for an API endpoint without recalling cURL's exact flag syntax, and API integrators use it to turn a set of headers and a JSON body from documentation into a runnable command. It's one of many free developer tools on Toolapt, and like every tool here, it's free to use with no sign-up and no limit on how many times you run it.

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Guide

Using the cURL Command Builder

  1. 1

    Step 1

    Choose the HTTP method and enter the request URL.

  2. 2

    Step 2

    Add any headers, one per line as Name: value, and a request body if needed.

  3. 3

    Step 3

    Toggle -k (skip TLS check) and multi-line formatting as needed.

  4. 4

    Step 4

    Click "Build command", then "Copy" to copy it into your terminal.

  • Supports GET, POST, PUT, PATCH, DELETE and HEAD methods
  • Adds any number of custom headers, one per line
  • Includes a request body automatically, except for GET and HEAD requests
  • Correctly shell-quotes every value, so quotes and special characters in headers or body don't break the command
  • Optional -k flag to skip TLS certificate verification
  • Optional multi-line formatting with \ line breaks for easier reading
  • Works entirely in your browser — nothing you enter is sent to a server

Developers

Developers use the cURL Command Builder for quickly assembling a test request for an API endpoint without recalling cURL's exact flag syntax.

API integrators

API integrators use the cURL Command Builder for turning headers and a JSON body from API documentation into a command they can actually run.

QA engineers

QA engineers use the cURL Command Builder for preparing a repeatable request to include in a bug report or test script.

Students learning APIs

Students learning APIs use the cURL Command Builder for seeing how a method, headers and body translate into a real command-line request.

Examples

cURL Command Builder examples

2 worked examples

01

A simple GET request

Method GET and URL https://api.example.com/users builds curl 'https://api.example.com/users'.

02

A POST with a JSON body

POST with a Content-Type: application/json header and a JSON body builds curl -X POST -H 'Content-Type: application/json' -d '{...}' 'https://api.example.com/users'.

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FAQ

Frequently asked questions

Quick answers to common questions about the cURL Command Builder.

What does the cURL Command Builder do?

It builds a ready-to-run cURL command from a method, URL, headers and body that you fill in.

Is the cURL Command Builder free to use?

Yes. It's free, with no sign-up, no watermark and no limit on how many times you use it.

Is my data safe when I use this tool?

Yes. The command is assembled entirely on your own device — nothing you enter is sent to a server.

How do I add multiple headers?

Enter one header per line in the Headers box, in the form Name: value, such as Authorization: Bearer TOKEN.

What does the -k flag do?

It tells cURL to skip TLS certificate verification, which is sometimes needed for local development servers with self-signed certificates — it should generally be avoided against production servers.

Why doesn't the body show up for a GET request?

GET and HEAD requests conventionally don't carry a request body, so the tool omits the --data-raw flag for those two methods even if you typed something in the Body field.

How are special characters in my values handled?

Every value — the URL, each header, and the body — is wrapped in single quotes with proper escaping, so characters like spaces, quotes and $ don't break the resulting shell command.

Can I use this tool on my phone?

Yes. The page is fully responsive and works on mobile, tablet and desktop browsers alike.

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