cURL to Code Converter
Client-sideFree & FastConvert cURL commands to JavaScript fetch, Python requests, Node.js, Go, PHP, and C#.
How to Convert cURL to Code
- 1Paste your cURL command: Copy a cURL command from your terminal, API documentation (Swagger/Postman), or browser network devtools, and paste it into the editor.
- 2Select target programming language: Choose between JavaScript (Fetch/Axios), Python (Requests), Node.js, Go (net/http), PHP (cURL), C# (.NET), or Java.
- 3Automatic header & body parsing: HTTP verbs, headers, Basic Auth credentials, URL query parameters, and JSON payloads are extracted and formatted into idiomatic code.
- 4Copy the code snippet: Click 'Copy Code' to paste the runnable HTTP request snippet directly into your project.
Frequently Asked Questions
Does this converter support multiline cURL commands?
Yes. Commands with bash backslash line continuations (`\`) and multiple `-H` or `-d` arguments are fully parsed and merged.
How does it handle JSON request bodies?
If the `-d` or `--data` payload contains valid JSON, the converter generates native object literals or dictionaries and wraps them in `JSON.stringify()` or `json=payload`.
Are API keys or authentication headers sent to a backend?
No. All tokenizing and code generation happens entirely in your browser using pure client-side JavaScript. Your secret tokens and API credentials remain 100% private.
Which cURL flags are supported?
The parser recognizes `-X` / `--request`, `-H` / `--header`, `-d` / `--data` / `--data-raw`, `-u` / `--user` (Basic Auth), and positional/explicit `--url` parameters.
In-Browser Execution & Security Architecture
Every operation performed on this page runs exclusively on your client device using modern browser web standards. Understanding how in-browser execution differs from traditional cloud-hosted developer utilities is essential for security-conscious software engineers:
Zero-Knowledge Local Sandbox
Unlike conventional web utilities that upload your payloads to a remote backend API for processing, DevToolNest executes native JavaScript algorithms directly in your browser's virtual machine (V8 on Chrome/Edge/Brave, JavaScriptCore on Safari, or SpiderMonkey on Firefox). Your tokens, keys, customer data, and JSON schemas never traverse the public internet or touch intermediate proxy caches.
Sub-Millisecond JIT Performance
Local execution eliminates HTTP round-trip latencies, TCP handshakes, TLS negotiation overhead, and cloud queue bottlenecks. Format 10MB payloads, parse deeply nested JSON objects, or decode thousands of tokens with instantaneous response times powered by native WebAssembly and optimized JavaScript JIT compilation.
Transient Memory & Ephemeral State
All parsed syntax trees, string buffers, and diff trees reside strictly within the ephemeral memory space of your browser tab. No persistent cookies, WebSQL, or remote databases store your computations. Closing the tab immediately releases all memory allocations, leaving zero residual footprint on external servers or local disk.
Strict RFC Standards Compliance
Our formatting and parsing logic conforms strictly to authoritative internet specifications including IETF RFC 8259 (JSON), RFC 7519 (JWT), RFC 3986 (URI), RFC 4648 (Base64), and YAML 1.2. This ensures that outputs generated in DevToolNest are 100% interoperable with production systems running Node.js, Go, Python, Java, and Rust.
Privacy Commitment
At DevToolNest, privacy is engineered into the code. This tool executes 100% locally in your web browser. No JSON payloads, URLs, API responses, or sensitive tokens are ever transmitted across the internet to our or any third-party servers.
“Client-side isolation eliminates data-in-transit risks and complies with zero-trust confidentiality mandates.”
Author & Technical Reviewer
Seasoned professional with over 5 years of experience in the IT industry specializing in Mobile and Web Development, strategic planning, project management, and delivering high-performance, user-centric digital tools.