API Request Builder & cURL Converter
Build API requests visually and instantly generate Fetch, Axios, cURL, C#, Python, PHP, Java and Go code.
Authentication
Request Builder
Headers
| Key | Value | |
|---|---|---|
Query Parameters
| Key | Value | |
|---|---|---|
Request Body
Features of Our API Request Builder
- Convert cURL commands into Fetch, Axios, C#, Python, PHP, and Go code instantly.
- Built-in API testing tool to send requests and view real-time responses.
- Supports GET, POST, PUT, PATCH, DELETE HTTP methods.
- Automatically parses headers, authentication, and request body from cURL.
- Supports Bearer Token, Basic Auth, and API Key authentication.
- Export requests directly to Postman Collection (v2.1).
- Generate OpenAPI (Swagger) specifications from requests.
- Share API requests using a unique shareable URL.
- Works completely in-browser with a fast, lightweight, and secure interface.
Why Use This API Request Builder?
- Convert cURL into ready-to-use code instantly without manual effort.
- Test APIs directly in the browser without needing Postman or external tools.
- Reduce errors while writing API requests in multiple programming languages.
- Improve developer productivity during API development and debugging.
- Quickly analyze API responses with real-time response viewer.
- One tool replaces multiple utilities like converters, testers, and exporters.
How to Use the API Request Builder
1. Paste your cURL command or build a request manually.
2. Select HTTP method (GET, POST, PUT, DELETE, etc.).
3. Add headers, authentication, and request body if required.
4. Click Send Request to test the API instantly.
5. Copy generated code or export it to Postman or OpenAPI format.
Who Should Use This API Builder?
- Frontend developers working with APIs and integrations
- Backend developers testing and debugging endpoints
- Full-stack developers switching between multiple API formats
- QA engineers testing REST APIs quickly
- Students and beginners learning API development
Frequently Asked Questions
An API Request Builder is a tool that helps developers create, test, and structure API requests visually without manually writing code. It can generate cURL, Fetch, Axios, C#, Python, and other code formats automatically.
cURL is a command-line tool used to send HTTP requests. Developers use it to test APIs, send data, and debug endpoints quickly from terminal or convert it into code formats.
The tool parses a cURL command, extracts URL, method, headers, and body, then converts it into a JavaScript Fetch API request that can be used directly in frontend applications.
Yes, the API Builder allows you to send HTTP requests directly from the browser and view real-time responses, similar to Postman.
Yes, the API Request Builder and cURL converter tool is completely free for developers to use without any signup or installation required.
Yes, it supports Bearer Token, Basic Auth, and API Key authentication methods, which are automatically added to request headers.
Yes, you can export generated requests as a Postman Collection (v2.1 format) and import them directly into Postman.
The tool supports multiple languages including JavaScript Fetch, Axios, C#, Python Requests, PHP cURL, and Go HTTP client.
No, all API requests are processed in your browser or temporarily during testing. No sensitive data is stored permanently on the server.
It saves time by converting complex API requests into ready-to-use code instantly, reducing manual errors and improving productivity during development and debugging.
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