curl Converter
Convert a curl command to fetch, axios, Python, Go, Rust, and 10 more targets.
published
- [FREE]
- [NO_SIGNUP]
- [NO_UPLOAD]
A curl converter parses a curl command and emits the equivalent HTTP call in your target language or HTTP client. This tool supports 15 targets — from browser fetch to Python requests to Java OkHttp to PowerShell — and runs entirely in your browser. Your headers, bodies, and cookies never touch a server.
How to use the curl converter
- Paste a curl command. Get one from Chrome DevTools (Network → right-click → Copy as cURL), Postman, or any API docs page. Multi-line continuations with backslashes work; so does single-line.
- Pick a target. 15 targets covering 95% of dev workflows.
- Read the output. Conversion runs on every keystroke (debounced 300 ms). The right pane shows the generated code with the proper imports.
- Replace secrets. Authorization headers,
--userpasswords, and any other secrets are emitted as string literals. Swap for environment-variable lookups before committing the generated code. - Copy, download, or share. Copy grabs the output. Download saves with the right file extension. Share link encodes both the curl and the target via URL hash.
Common workflows
Debugging a flaky API integration
A request works in Postman but fails from your Node code. The fastest diagnostic:
- Copy the working request from Postman as curl.
- Paste here, pick Node.js (axios) as the target.
- Compare the generated code line-by-line against your hand-written client.
Usually the difference is a missing header, a wrong content type, or a body that’s stringified in the wrong order.
Quickly drafting a new HTTP client
A vendor sends you a curl example for their new API. Paste it, pick your language, get a working client in 10 seconds. Then add error handling, retries, and tests.
Cross-checking docs
API docs say “use this curl command” but you’re working in Rust. Convert and you have a copy-paste reqwest client that matches the docs exactly.
Supported curl flags
The parser handles the common ones:
| Flag | Notes |
|---|---|
-X / --request | HTTP method (GET, POST, PUT, DELETE, PATCH, etc) |
-H / --header | Headers, repeatable |
-d / --data | Body, treated as form-encoded if Content-Type is unset |
--data-raw, --data-binary | Body without form-encoding |
-F / --form | Multipart fields; field=@./file for file uploads |
--cookie / -b | Cookies, parsed into the target’s cookie API |
-u / --user | Basic auth (user:pass) |
--user-agent / -A | Custom User-Agent |
| Query strings in the URL | Parsed and emitted in the target’s idiomatic form |
Less-common flags (--compressed, --insecure, --http2, etc) are parsed but most are ignored on output because the target client picks its own behavior.
Security note: secrets in your curl
Curl examples copied from Chrome DevTools often contain real session cookies and Authorization tokens. The converter emits them verbatim into the output. Before:
- Committing the generated code, replace tokens with environment-variable lookups.
- Sharing a converted snippet on Slack/Stack Overflow, redact the same tokens manually.
- Sharing the URL-hash link from this tool, strip any secret-bearing curl flags first (the URL fragment contains them, encoded in base64, but trivially decodable).
The tool runs locally, so the secrets stay on your machine — but the moment you send the output anywhere, they’re plain text again.
How it compares
| bytefork.tools | curlconverter.com | postman code generation | |
|---|---|---|---|
| Runs in browser | ✓ | ✓ | desktop app |
| Lazy-loaded library bundle | ✓ | upfront | n/a |
| 15+ target languages | ✓ | ✓ | partial |
| Share-by-URL hash (no account) | ✓ | ✓ | requires Postman account |
| Ad-free | ✓ | ✗ | ✓ |
| Multi-line curl with backslashes | ✓ | ✓ | ✓ |
Privacy and security
A static HTML page with a small initial JavaScript bundle. The curlconverter library, once lazy-loaded, runs entirely in your browser tab. Headers, bodies, cookies — none of it touches a server. The share link encodes state in the URL fragment (#…) — that part of a URL is not sent to servers.
Related tools
- JWT Decoder & Verifier — decode the Bearer token in your curl’s Authorization header.
- JSON Formatter & Error Reviewer — pretty-print the JSON body before/after converting.
- Hash Generator — generate SHA-256 for request signing (e.g. AWS SigV4 components).
- JSON to Types Generator — generate types for the response body matching your curl’s endpoint.
Frequently asked questions
Is my curl command sent to a server?
No. Conversion runs in your browser via the curlconverter library, lazy-loaded on first conversion. The same library powers curlconverter.com, but here it runs entirely client-side — your Authorization headers, request bodies, and cookies never leave the page. Open DevTools → Network and you will see no outbound request with your input.
Which languages and clients are supported?
JavaScript fetch (browser and Node), node-fetch, axios, Python requests, Python http.client (stdlib), Go net/http, Rust reqwest, Ruby net/http, PHP Guzzle, Java OkHttp, Kotlin, Swift URLSession, C# HttpClient, PowerShell Invoke-RestMethod, and HTTPie. 15 targets covering 95% of dev workflows.
Where do I get a curl command to paste?
Three common sources. (1) Chrome / Firefox DevTools → Network tab → right-click a request → Copy as cURL. (2) Postman → Code button → cURL. (3) any API docs page that lists curl examples. Paste the whole thing including the line continuations.
My curl command has multi-line continuations with backslashes. Does that work?
Yes. Backslash-newline continuations are the standard way curl commands are formatted for readability, and the parser handles them transparently. You can also paste a single-line curl with all flags on one line; both work.
What about secret values in headers?
They are emitted as string literals in the output. The converter does not redact, mask, or replace them. Before committing the generated code to a repo, replace literal Bearer tokens, API keys, and basic-auth credentials with environment-variable lookups (`process.env.API_KEY` in Node, `os.environ["API_KEY"]` in Python, etc).
Does it support multipart uploads and file references?
Yes for the structure — `-F field=value` and `-F file=@./path` round-trip into the target language\'s multipart API. The file reference is preserved as a string; you may need to wrap the path with the target language\'s file-read primitive (e.g., `fs.readFileSync` in Node, `open()` in Python).
Can it convert HTTP/2-only flags like --http2?
It parses them but most output targets ignore HTTP-version flags because the target client picks its own. fetch in browsers negotiates HTTP/2-3 automatically; axios uses Node\'s http2 module when configured. If you really need HTTP/2-pinning, configure it on the client side after generation.
Why is the bundle lazy-loaded?
The curlconverter library is moderately large (~300 KB gz). Loading it only when you actually convert keeps the initial page paint fast. After the first conversion the library stays in memory and subsequent conversions are instant.
Can I share my conversion session?
Yes. The share link encodes the curl command and the selected target into the URL fragment. Recipients see the same setup. Be careful — if your curl contains secrets, the link contains them too. Strip before sharing.
Is the curl converter really free?
Yes. No signup, no account, no ads, no telemetry on your input. The source is on the project repository.