REST Client Request Builder

About this tool

Compose a REST API request and get a ready-to-run curl command. Set the method, URL, headers and JSON body, then copy the command to your terminal.

Example

Input: POST + URL + body

Output: curl -X POST "..." -d ...

Privacy

This tool runs entirely in your browser. Your data is processed locally and never uploaded to a server.

How to use this tool

1. Choose the HTTP method you want to send, such as GET, POST, PUT, or DELETE.
2. Enter the request URL exactly as your API expects it, including the scheme and path.
3. Add any headers you need, such as Authorization or Content-Type.
4. Paste a JSON body when the request needs one, then copy the generated curl command to run in your terminal.

Step by step, what happens

1. The tool takes the method, URL, headers, and JSON body you enter and turns them into one shell command.
2. It maps the method to the curl request options and includes the URL as the target endpoint.
3. Each header becomes a separate curl header flag so the request keeps the same metadata.
4. If you provide a JSON body, the tool adds it to the command in a form curl can send to the server.
5. You can copy the final command and run it directly without manually assembling the request syntax.

Worked example

Suppose you want to send a POST request to create a user profile in a local test API.

Input: POST https://api.example.com/users Header: Content-Type: application/json Body: {"name":"Ava"}

1. You select POST, paste the endpoint, add the JSON content type header, and enter the JSON body.
2. The tool builds a curl command that targets the URL, includes the header, and sends the body with the request.
3. You copy the generated command into your terminal and run it against the API.

Tips and common mistakes

• Always include https:// or http:// in the URL so the command targets the right server.
• Use Content-Type: application/json when you send JSON, or the API may reject the body.
• If you add an Authorization header, double-check the token format before copying the command.
• Keep the JSON body valid and compact, because the tool is designed to turn it into a ready-to-run curl request.

Frequently asked questions