cURL to Code Converter

API documentation has a standard format for showing request examples, and that format is almost always cURL. It is a reasonable choice. cURL is universal, it runs on every platform, and a cURL command captures the full request in a single line that can be copied and run directly in a terminal. The problem is that the vast majority of developers are not writing their application code in cURL. They are writing it in Python, JavaScript, PHP, Go, Ruby, Java, or one of a dozen other languages, and translating a cURL command into idiomatic code for those languages by hand is repetitive work that should not require any thought at all.

This tool does the translation. Paste a cURL command, select your target language, get working code. No manual parsing of flags, no looking up which HTTP library your language uses by default, no second-guessing whether you got the header syntax right.

What cURL Commands Actually Contain

Understanding what this tool is translating helps explain why manual conversion is tedious enough to warrant a dedicated tool.

A cURL command encodes an HTTP request using command-line flags. The URL is the main argument. The -X flag sets the HTTP method. The -H flag adds headers, and a complex request might have five or six of them. The -d flag provides the request body, which for JSON APIs is often a multi-line object. The -u flag handles basic authentication. The --data-urlencode flag handles form-encoded data. The -b flag sets cookies. The -F flag handles multipart form uploads. The -k flag disables SSL verification, which is a flag you will see in documentation examples more often than you should.

A realistic API request with authentication, custom headers, and a JSON body looks something like this:

curl -X POST https://api.example.com/v1/users \
  -H ""Authorization: Bearer eyJhbGciOiJIUzI1NiJ9..."" \
  -H ""Content-Type: application/json"" \
  -H ""Accept: application/json"" \
  -d '{""name"": ""Alice"", ""email"": ""[email protected]"", ""role"": ""admin""}'

Translating that correctly to Python using the requests library, to JavaScript using fetch, to PHP using Guzzle, and to Go using net/http each requires knowing the idioms, method signatures, and conventions of each language and its relevant HTTP library. None of it is difficult, but none of it is interesting either. It is mechanical work, and mechanical work is what tools are for.

Languages Supported

The converter handles 15+ programming languages, covering the languages developers actually use when working with APIs:

Python outputs using the requests library, which is the standard for Python HTTP work. JavaScript outputs using either the Fetch API for browser and modern Node.js environments. Node.js outputs using axios or the built-in https module depending on the request complexity. PHP outputs using either cURL functions or Guzzle. Go uses the net/http package. Ruby uses Net::HTTP or RestClient. Java uses HttpClient or OkHttp. C# uses HttpClient. Swift uses URLSession. Kotlin uses OkHttp. R uses the httr package. Shell outputs a cleaned and normalized cURL command.

The output for each language follows the conventions of that language's standard HTTP tooling, not a generic lowest-common-denominator approach that technically compiles but reads like it was written by someone who learned the language yesterday.

How to Use the cURL to Code Converter

1. Paste your cURL command into the input area. Multi-line commands with backslash continuation are handled correctly.
2. Upload a file containing a cURL command if you have it saved, or drag and drop it into the input area.
3. Select your target programming language from the available options.
4. Click Convert.
5. The generated code appears in the output area instantly.
6. Copy it to your clipboard with one click and paste it directly into your project.

The tool parses all standard cURL flags including method, headers, body, authentication, cookies, and form data. The output is production-ready code that handles the same request the original cURL command makes.

Where This Fits in API Development Workflows

Reading API documentation. Almost every API documentation page includes cURL examples. When you are integrating a payment processor, a messaging service, a mapping API, or any third-party service, the examples in their documentation are your starting point. Converting them to your language of choice is the first step in every integration, and having a tool that handles it instantly removes a consistent source of friction.

Debugging with browser DevTools. Chrome, Firefox, and Edge all let you right-click any network request in the DevTools Network tab and copy it as a cURL command. This is one of the most useful debugging capabilities in the browser and it is underused. When a request from your application is behaving unexpectedly, copying it as cURL gives you an exact reproduction you can inspect, modify, and test in isolation. Converting that cURL back to your application language lets you understand exactly what the browser sent compared to what your code is sending.

Working with Postman and API testing tools. Postman can export requests as cURL. If you are exploring an API in Postman and find a request configuration that works, exporting it as cURL and converting to your target language is a clean path from exploration to implementation.

Team communication across language boundaries. cURL is language-neutral. When a backend developer is sharing a request example with a frontend developer, or when a DevOps engineer is documenting an API call for a developer who works in a different language, cURL is the common currency. This tool removes the translation step on whichever end needs it.

Handling Complex Requests

Simple GET requests are straightforward. The more interesting cases are where manual translation becomes genuinely error-prone.

Multi-part form uploads. The -F flag in cURL handles multipart form data including file uploads. The equivalent in most languages requires constructing a multipart body object with specific field types, and getting the boundary handling and content-type headers correct manually is fiddly. The converter handles this translation correctly.

Nested JSON bodies. A -d flag containing a complex nested JSON object needs to be parsed and reconstructed as the appropriate data structure in the target language, whether that is a Python dictionary, a JavaScript object literal, a PHP array, or a Go struct initialization. The converter reads the JSON from the cURL body and generates the idiomatic equivalent.

Authentication formats. Bearer tokens, basic auth with -u, API key headers, and digest authentication each translate differently depending on the language and library. The converter recognizes the authentication pattern and generates the appropriate code.

Query parameters. URLs with query strings are handled correctly, with the parameters either kept inline in the URL or restructured as a parameters object depending on the conventions of the target language.

Using Generated Code Responsibly

A few practical notes that apply to any code generated from cURL commands rather than written from scratch.

API keys, tokens, and credentials appear in cURL commands and will appear verbatim in the generated code. Before committing generated code to a repository, replace hardcoded credentials with environment variables or whatever secret management approach your project uses. Committing API keys to version control is a well-documented way to have a bad day.

The -k flag, which disables SSL certificate verification, appears in some API documentation examples to avoid certificate issues in local development environments. Generated code that includes the SSL verification bypass should have that removed before anything goes to production. Disabling SSL verification in production code exposes requests to man-in-the-middle attacks.

Generated code is a starting point. It handles the request correctly, but integrating it into a real application means adding error handling, response parsing, retry logic, and whatever else your application's HTTP layer requires. The conversion is the beginning of the integration work, not the end of it.

For validating that API responses are well-formed JSON before building response handling logic around them, the JSON Formatter handles parsing and validation. For generating the meta tags and structured data that web-facing API-driven pages need, the Meta Tags Generator and Schema Markup Generator handle those layers separately.

Frequently Asked Questions

What cURL flags does the converter support?

The converter handles all standard cURL flags including -X for HTTP method, -H for headers, -d and --data for request body, -u for basic authentication, -b for cookies, -F for multipart form data, --data-urlencode for form-encoded data, -L for following redirects, and -k for SSL verification bypass. Complex multi-line commands with backslash continuation are parsed correctly.

Does the generated code work exactly like the original cURL command?

The generated code makes the same HTTP request as the original cURL command, sending the same method, headers, body, and authentication. The code follows the idioms and standard libraries of the target language rather than trying to replicate cURL's exact behavior at a lower level. Minor differences in how each library handles connection pooling, timeouts, and redirects may exist but do not affect the request itself.

Can I convert a cURL command copied from Chrome DevTools?

Yes. The ""Copy as cURL"" option in Chrome, Firefox, and Edge DevTools produces a valid cURL command that this tool parses correctly, including all request headers the browser sent, the request body, and authentication cookies. This is one of the most useful ways to use the converter.

Is it safe to paste cURL commands containing API keys into this tool?

The tool processes everything client-side in your browser. Your cURL input is not transmitted to any server. That said, standard credential hygiene applies: replace hardcoded credentials in the generated code with environment variables before committing anything to version control or sharing it with others.