cURL to Code Converter is a free, browser-based tool
from UseToolSuite's
Network & API Tools collection.
All processing happens locally on your device — your data is never uploaded to any server.
Use the tool below, then scroll down for detailed documentation, frequently asked questions, and related resources.
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Parsed Request Specs
Method
Auth
Headers
Payload
Generated Synthesis
Polyglot cURL to Code Converter
A resilient AST parser built directly into the browser. It tokenizes complex, multi-line cURL arguments (including escaped quotes, data bodies, headers, and authentication) and safely transcompiles them into production-ready SDK snippets for JavaScript (fetch), Python (requests), Go (net/http), Rust (reqwest), PHP, and Node.js.
Zero-Knowledge State Hydration
Your API keys, tokens, and payloads never touch a server. All parsing logic lives in your browser. Using the URL sharing feature, you can safely encode the parsed state directly into a link, allowing you to seamlessly pass context across environments without risking credential leakage into server logs.
The “Copy as cURL” workflow that powers this tool
You rarely type a cURL command by hand. The fastest path: open DevTools → Network, find the request you want to reproduce, right-click it, and choose Copy → Copy as cURL. You now hold the exact request the browser sent — headers, cookies, body and all. Paste it here, pick a language, and you have a working code snippet that reproduces it outside the browser. This loop — observe in the browser, replay in code — is how most API integrations actually start.
What translates cleanly, and what needs a human
The converter maps the common flags faithfully, but a few cURL behaviours have no clean equivalent in every target:
cURL flag
Meaning
Translation note
-X, -H, -d, -u
method, header, body, basic auth
One-to-one in every language
-b / --cookie
request cookies
Becomes a Cookie header; browser fetch may override it
Impossible in browser fetch; in Python it’s verify=False
-F / --form
multipart upload
Structure is generated; file streams need manual wiring
The -k row is the one that surprises people: a browser fundamentally cannot ignore certificate errors from script, so a command that relied on -k against a self-signed endpoint won’t reproduce as fetch() — run that one from a server-side language instead.
A note on secrets before you paste
Commands copied from production traffic carry live material — Authorization: Bearer … tokens, session cookies, API keys. Conversion happens entirely in your browser and nothing is transmitted, but treat the output with the same care: don’t paste a snippet containing a real token into a public gist, a ticket, or a chat. The clean habit is to convert with the real values, then replace them with environment-variable placeholders (process.env.API_TOKEN, os.environ["API_TOKEN"]) before the code lands anywhere it might be read.
Why the generated code looks more verbose than yours
The output sets headers explicitly even when a library would infer them — an explicit Content-Type: application/json, for instance, where requests would add it for you when you pass json=. That’s deliberate: the goal is a snippet that reproduces the exact request the cURL command described, not the shortest idiomatic version. Once you’ve confirmed it works, collapse it toward your project’s conventions — drop the redundant headers, switch data=json.dumps(...) to json=..., and so on.
How to Use This Tool
1
Input cURL
Paste a raw cURL command exported from a tool or documentation.
2
Choose Target
Select your preferred programming language.
3
Copy Code
Instantly get the equivalent SDK code snippet to paste into your project.
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Essential terms and definitions related to cURL to Code Converter.
cURL
A command-line tool for transferring data using various protocols (HTTP, HTTPS, FTP, etc.). cURL is available on virtually every operating system and is the de facto standard for demonstrating API requests in documentation. The name stands for "Client URL" and it supports dozens of protocols and options for customizing requests.
HTTP Method
The action to perform on the resource identified by the URL. Common methods: GET (retrieve data), POST (create/submit data), PUT (replace data), PATCH (partial update), DELETE (remove data). The method is specified in cURL with the -X flag, though GET is the default when no method or data is specified.
Request Headers
Key-value pairs sent with an HTTP request that provide metadata about the request. Common headers include Content-Type (format of the request body), Authorization (credentials), Accept (preferred response format), and User-Agent (client identification). In cURL, headers are set with the -H flag.
Frequently Asked Questions
Which cURL options are supported?
The converter supports the most common cURL options: -X (method), -H (headers), -d/--data (request body), -u (basic auth), --user-agent, -b (cookies), -L (follow redirects), -k (insecure/skip SSL), and URL specification. These cover the vast majority of API request patterns found in documentation.
Does the converter handle multipart form data?
The converter handles -d/--data for JSON and form-encoded bodies. Complex multipart file uploads (-F) are partially supported — the generated code shows the structure but may need manual adjustment for file stream handling in the target language.
Can I convert cURL commands with authentication?
Yes. The converter handles Basic authentication (-u user:pass), Bearer tokens (-H "Authorization: Bearer ..."), and custom authentication headers. The generated code preserves the authentication method in the target language's idiomatic format.
Why does the generated code differ from what I would write manually?
The converter produces functionally correct code that mirrors the exact cURL request. It may include explicit header settings that some libraries handle automatically. The generated code prioritizes correctness and completeness over brevity — you can simplify it based on your project's conventions.
Why does my converted fetch() code fail with a CORS error when curl worked?
curl is not a browser and never enforces the same-origin policy — it sends the request and prints whatever comes back. Browser fetch() is bound by CORS: the target server must return an Access-Control-Allow-Origin header that permits your page's origin, or the browser blocks JavaScript from reading the response. The request often still reaches the server; you just can't see the result. The fix is server-side (enable CORS on the API, or call it from your own backend), not in the generated code.
What's the difference between -d and --data-binary when converting?
curl's -d (and --data) strips newlines and carriage returns from the payload and defaults the Content-Type to application/x-www-form-urlencoded. That quietly corrupts anything where bytes are significant — signed webhook bodies, multiline JSON, raw binary. --data-binary sends the payload exactly as given. When converting a command that posts a signature-sensitive or multiline body, prefer the --data-binary form so the generated code preserves the bytes verbatim.
Troubleshooting & Technical Tips
Common errors developers encounter and how to resolve them.
cURL command not parsed correctly
Ensure the command starts with "curl" and uses standard option syntax. Remove line continuation characters (\) and join the command into a single line. If the command uses single quotes on Windows, try converting to double quotes.
Generated code has incorrect Content-Type
The converter infers Content-Type from the cURL options. If -d is used with JSON-like data but no -H "Content-Type: application/json", the converter may default to form-encoded. Add the explicit Content-Type header to your cURL command for accurate conversion.
URL with special characters causes parse error
URLs containing special characters (query parameters with &, =, spaces) should be enclosed in quotes in the cURL command. If the URL is not quoted, the shell may interpret special characters before the converter sees them.
Related Guides
In-depth articles covering the concepts behind cURL to Code Converter.
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