HTTP Request Builder & cURL Generator
Configure any HTTP request through a visual form and instantly generate ready-to-run code in cURL, JavaScript Fetch, Axios, Python requests, and HTTPie. Ideal for API developers, testers, and anyone who wants correct HTTP code without memorizing syntax. All generation happens in your browser — no data is sent anywhere. For APIs that return XML responses, or when you need to write a regular expression to extract fields from the response body, those tools are ready alongside this one.
How to Use the cURL Command Builder
- Enter the full URL of the API endpoint you want to call.
- Select the HTTP method — GET, POST, PUT, PATCH, DELETE, HEAD, or OPTIONS.
- Add query parameters as key-value pairs; they are automatically appended to the URL.
- Add any required request headers such as
AcceptorContent-Type. - Choose an authentication method: Bearer Token, Basic Auth, or API Key header.
- For POST, PUT, and PATCH requests, select a body content type and enter the payload.
- Click any output tab to view the generated code, then click Copy to use it.
Key Features
- Visual HTTP request builder — no syntax to remember
- Supports all 7 common HTTP methods including HEAD and OPTIONS
- Key-value editors for query parameters and request headers
- Bearer Token, Basic Auth (base64-encoded), and API Key authentication
- Request body support for JSON, form-urlencoded, plain text, and multipart
- Output in cURL, JavaScript Fetch, Axios, Python requests, and HTTPie
- Live update — the code regenerates as you type
- One-click copy for the active output tab
Use Cases
Generate curl commands for REST API documentation
API documentation almost always includes cURL examples. Configure the endpoint, add auth headers and a JSON body, then copy the generated cURL command directly into your docs or README without manually quoting arguments.
Convert curl to Python requests for backend scripting
When a colleague shares a cURL command and you need it in Python, rebuild it in the form and switch to the Python tab. The tool generates correct requests.post() or requests.get() calls with headers and JSON payload handled properly.
Build authenticated API calls with Bearer Token
Select Bearer Token auth, paste your JWT or OAuth access token, and the tool adds the Authorization: Bearer <token> header to every output format — no manual string formatting required.
Generate JavaScript Fetch code for front-end development
Front-end developers can configure POST requests with JSON bodies and copy the Fetch API code directly into their React, Vue, or vanilla JS applications, complete with the correct method, headers, and body serialization.
Test HTTPie commands before running them in a terminal
HTTPie has a clean CLI syntax that is easy to read but tricky to format for complex requests. The builder generates the correct HTTPie command so you can test the structure before running it in your terminal.
FAQ's
cURL (Client URL) is a command-line tool for making HTTP requests. Its syntax for complex requests — multiple headers, auth, body content type, and flags — can be long and error-prone. A visual builder lets you configure the request through a form and generates the correct command instantly, eliminating typos and syntax errors.
Bearer Token authentication adds an Authorization: Bearer <your-token> header to the request. All five output formats — cURL, Fetch, Axios, Python, and HTTPie — include this header correctly. The token is never sent to any server; it only appears in the generated code on your screen.
The builder supports application/json (most REST APIs), application/x-www-form-urlencoded (HTML form submissions), text/plain, and multipart/form-data (file uploads). The appropriate Content-Type header is added to the generated code automatically.
The Fetch API is built into modern browsers and Node.js 18+, so it requires no additional dependencies. Axios is a popular third-party library (npm install axios) that adds features like automatic JSON response parsing, request and response interceptors, timeout handling, and better error objects. Both are widely used in production JavaScript applications.
No. This tool is entirely client-side. All code generation happens locally in your browser using JavaScript. Your URLs, tokens, headers, and request body content never leave your machine and are never sent to Toolaroid's servers or any third party.
This tool generates code — it does not execute requests. To test endpoints, copy the generated cURL command and run it in your terminal, or paste the Fetch/Axios code into your browser console or a code editor. For a full API testing workflow, pair this with a tool like Postman or use the HTTP Header Viewer to inspect responses.
Basic Auth combines username and password as username:password, Base64-encodes the string, and sends it as Authorization: Basic <encoded>. The builder does this encoding automatically in all output formats. You can also use cURL's -u username:password flag, which cURL handles internally.
Yes. Query parameter keys and values are percent-encoded using encodeURIComponent before being appended to the URL. This ensures characters like spaces, ampersands, and equals signs in parameter values do not break the URL structure.
Whether you are a back-end developer documenting an API, a front-end engineer integrating a third-party service, or a DevOps engineer testing infrastructure endpoints, having ready-to-run HTTP request code in your preferred language saves meaningful time. Toolaroid's cURL Builder eliminates the friction of translating between curl flags and library syntax. Configure once, copy to any language, and move on. The tool works entirely in your browser — no account, no ads, no rate limits, and no risk of leaking API credentials to a third party.