How does the converter distinguish between JSON payloads, URL-encoded forms, and raw data?

The converter inspects both the presence of explicit Content-Type headers (-H "Content-Type: application/json") and the payload structure in -d / --data flags. If valid JSON is detected, it generates structured JSON serialization (e.g., JSON.stringify() in JavaScript, json= parameter in Python requests, or serde_json in Rust). If --data-urlencode or form-encoded strings are supplied, it constructs URLSearchParams, data= dictionaries, or url.Values accordingly.

How are Basic Authentication (-u) and Bearer tokens transformed across different languages?

When -u username:password is provided, the converter outputs the most idiomatic auth pattern for the chosen target: native auth=("user", "pass") tuples in Python requests, btoa("user:pass") Basic Authorization headers in Fetch/Axios, req.SetBasicAuth() in Go net/http, or basic_auth credentials in Rust reqwest. Custom Authorization: Bearer headers are preserved verbatim across all target templates.

How does the parser translate -F (--form) multipart file uploads and form fields?

cURL -F flags (such as -F "file=@/path/photo.png" -F "title=Photo") are mapped directly to native multipart handling constructs: new FormData() with append() in JavaScript, the files={"file": open("photo.png", "rb")} dictionary in Python requests, mime/multipart Writer in Go, and MultipartBody.Builder in Kotlin OkHttp. Automatic boundary generation and proper Content-Type omission are preserved.

How are request timeouts (--max-time, --connect-timeout) mapped to language-native clients?

Timeout flags are converted to modern cancellation mechanisms: AbortSignal.timeout(ms) for standard JavaScript Fetch, timeout: ms in Axios config, timeout=seconds in Python requests, context.WithTimeout(ctx, duration) in Go net/http, and ClientBuilder::timeout() in Rust reqwest. This ensures generated code meets production resilience standards.

How does the converter handle cookies passed via -b (--cookie)?

Cookie strings passed via -b "session_id=xyz; theme=dark" or --cookie are parsed into key-value pairs. In Fetch and Node.js targets, they are serialized into standard Cookie request headers. In Python requests, they are passed via the cookies={"session_id": "xyz"} dictionary or attached to a persistent requests.Session() object.

How are HTTP redirects (-L) and SSL certificate bypass flags (-k) represented in code?

The -L (--location) flag maps to redirect: "follow" in Fetch, allow_redirects=True in Python, and default redirect policies in Go and Axios. The -k (--insecure) flag generates explicit TLS validation bypasses with warning comments: https.Agent({ rejectUnauthorized: false }) in Node.js, verify=False in Python requests, and tls.Config{ InsecureSkipVerify: true } in Go.

Can I paste cURL commands exported directly from Chrome, Safari, or Firefox DevTools?

Yes. Browser DevTools "Copy as cURL (bash / POSIX)" exports include verbose browser headers (like Sec-Ch-Ua, User-Agent, Accept-Language) and backslash-escaped line continuations. The parser cleans up line wraps, decodes escaped characters, and preserves every header and cookie exactly as recorded during the browser network event.

Can I convert cURL commands exported from Postman or Insomnia?

Yes. Postman's "Code Snippet -> cURL" and Insomnia's "Copy as cURL" formats are fully compatible. Simply paste the command to immediately generate equivalent code in any of our 14 programming language targets without needing third-party desktop tools.

How does the parser handle custom HTTP methods (PATCH, DELETE, OPTIONS, HEAD)?

The converter inspects -X, --request, or implicit method indicators (like -I for HEAD and -d for POST). For PATCH, PUT, and DELETE operations, it configures the appropriate method field on the target client—such as method: "PATCH" in Fetch, requests.patch() in Python, or http.NewRequest("PATCH", ...) in Go.

Is my cURL request data or authorization token sent to any external server?

No. All lexical analysis, AST tokenization, flag parsing, and source code generation run 100% locally in your browser using pure client-side TypeScript. Your proprietary API keys, bearer tokens, passwords, and private endpoint URLs are never uploaded, logged, or proxied through our servers.

cURL to Code Converter — Fetch, Python, Axios, Go & Rust

DevFlow

Free online cURL to code converter. Instantly transform complex cURL CLI commands, browser DevTools network copies, and Postman requests into clean, idiomatic code across 14 target languages—including JavaScript (Fetch, Axios, Node.js http/https), Python (Requests, http.client), Go (net/http), Rust (reqwest), Java, C#, PHP, Ruby, Swift, Kotlin, and PowerShell. Accurately parses headers (-H), raw JSON payloads (-d, --data-raw), URL-encoded forms (--data-urlencode), multipart file uploads (-F), Basic and Bearer auth (-u), cookies (-b), redirects (-L), and timeouts (--max-time). Features an interactive Request Inspector, automated syntax highlighting, and zero-server execution for complete API key and token privacy.

JavaScript is required to use this interactive tool. Please enable JavaScript in your browser, or use our cURL to Code Converter API for programmatic access.

Browse all Web Code tools →

Popular Web Code tools

Browse all 21 Web Code tools →

How to cURL to Code Converter Online

Paste your cURL command into the input area. Multi-line shell commands with backslash (\) continuations and quoted arguments are parsed automatically.
Select your target language or HTTP client library from the dropdown bar—including JavaScript (Fetch, Axios, Node.js), Python (Requests, http.client), Go, Rust, Java, C#, PHP, Ruby, Swift, Kotlin, or PowerShell.
Click Convert or press ⌘↵ to generate clean, idiomatic, copy-ready source code immediately.
Open the Request Inspector (⌘⇧I) to verify the parsed URL, HTTP method, header count, query parameters, auth mode, and payload structure.
Copy the generated snippet with ⌘⇧C, download it to disk, or generate a shareable URL containing your compressed cURL command.

cURL to Code Converter Features

14 language & client targets: JavaScript Fetch, Axios, Node.js http/https, Python Requests, Python http.client, Go net/http, Rust reqwest, Java 11+ HttpClient, C# HttpClient, PHP cURL, Ruby Net::HTTP, Swift URLSession, Kotlin OkHttp, and PowerShell Invoke-RestMethod.
Comprehensive cURL flag parsing: Full support for -X (--request), -H (--header), -d (--data, --data-raw, --data-binary, --data-urlencode), -F (--form), -u (--user), -b (--cookie), -L (--location), -k (--insecure), --compressed, -o (--output), -m (--max-time), --connect-timeout, and --proxy.
Intelligent payload type inference: Automatically differentiates between raw JSON strings, URL-encoded form parameters, binary file streams, and multipart form boundaries.
Interactive Request Inspector: Visual debugging panel displaying parsed endpoint components, normalized headers, query parameters, authentication schemes, and cookie tables.
Multipart form serialization: Accurately converts -F file uploads and text fields into native FormData instances, Python files dictionaries, Go multipart.Writer buffers, and OkHttp MultipartBody builders.
Authentication handling: Converts -u username:password into base64 Authorization: Basic headers, Python requests auth tuples, Go req.SetBasicAuth, or .NET NetworkCredential instances, while preserving Bearer JWT headers.
Robust shell string parsing: Handles POSIX shell escaping, single/double quotation nesting, line continuations (\), and ANSI-C $'...' escape sequences.
Instant live mode: Re-evaluates and outputs updated code dynamically as you type or paste modified arguments.
Compressed URL sharing: Encodes your cURL command into a compact URL parameter so you can share reproducible API reproduction snippets with teammates.
100% client-side privacy: Operates entirely inside your browser sandbox with zero network telemetry or server logging—sensitive API keys, bearer tokens, and credentials never leave your device.
Integrated developer shortcuts: ⌘↵ to convert, ⌘⇧C to copy generated code, ⌘⇧K to clear inputs, and ⌘⇧I to toggle the inspector.
Syntax highlighted output: Production-grade code blocks tailored with language-specific best practices, proper error handling, and asynchronous lifecycle handling.

Supported Formats & Dialects

The cURL to Code Converter supports 14 syntax formats and dialects for accurate parsing and processing.

JavaScript — fetch(): Native modern browser and Node.js 18+ Fetch API utilizing async/await, AbortSignal timeouts, and JSON serialization.
JavaScript — Axios: Promise-based HTTP client for browser and Node.js with config object syntax, automatic JSON transformation, and custom headers.
Node.js — http/https: Zero-dependency native Node.js core modules using stream-based request writing, chunked responses, and custom agent configuration.
Python — requests: The de facto standard Python HTTP library featuring session management, auth tuples, json/data kwargs, and SSL verification controls.
Python — http.client: Python standard library HTTP client for zero-dependency scripts, embedded systems, and sandboxed execution environments.
Go — net/http: Idiomatic Go standard library client utilizing http.NewRequestWithContext, explicit header setting, and defer resp.Body.Close().
Rust — reqwest: Asynchronous Rust HTTP client with Tokio runtime support, serde JSON body serialization, and Result-based error handling.
Java — HttpClient: Modern Java 11+ java.net.http.HttpClient with HttpRequest.Builder, BodyPublishers, and HttpResponse.BodyHandlers.
C# — HttpClient: .NET async/await HttpClient with HttpRequestMessage, StringContent, FormUrlEncodedContent, and Task-based responses.
PHP — cURL: Standard PHP libcurl wrapper using curl_init(), curl_setopt_array(), and curl_exec() for legacy and modern PHP backends.
Ruby — Net::HTTP: Standard Ruby HTTP client with URI parsing, Net::HTTP::Post, custom request headers, and SSL context configuration.
Swift — URLSession: Apple Foundation framework URLSession generating modern Swift async/await URLRequest and URLSession.shared.data code.
Kotlin — OkHttp: Standard Android and JVM HTTP client utilizing OkHttpClient, Request.Builder, RequestBody, and MultipartBody builders.
PowerShell — Invoke-RestMethod: Modern Windows PowerShell and PowerShell Core REST cmdlet with hashtable headers, method flags, and JSON payloads.

C# Classes, Records & JSON Serialization in .NETDeveloper Tools

C# classes and record types define typed data models in .NET. Learn how System.Text.Json, Newtonsoft.Json, attributes, and records enable robust JSON serialization.

Cross-Origin Resource Sharing (CORS)Network

CORS is an HTTP-header based security mechanism enforced by web browsers to restrict cross-origin network requests from accessing sensitive server resources.

cURL (Client URL) Command & LibraryNetworking

cURL is a command-line tool and library (libcurl) for transferring data with URLs across HTTP, HTTPS, FTP, and dozens of network protocols.

Go Structs & JSON Serialization in GolangDeveloper Tools

Go structs define typed data models in Golang. Learn how struct tags, encoding/json, omitempty, and pointers enable robust JSON serialization.

HTTP Headers (Request & Response Metadata)Networking

HTTP headers are key-value metadata fields transmitted in HTTP requests and responses that govern caching, authentication, cookies, and security.

Server-Sent Events (SSE) & EventSource APINetwork

Server-Sent Events (SSE) is an HTTP-based standard that allows servers to stream real-time text events unidirectionally over a single persistent connection.

URL Encoding (Percent-Encoding)Encoding

URL encoding (percent-encoding) is an RFC 3986 mechanism that converts reserved or unsafe characters in a URI into a percent sign followed by two hex digits.

Webhooks (HTTP Push Notifications & Reverse APIs)Networking

A webhook is an event-driven HTTP callback mechanism that sends real-time automated payloads between web systems when specific triggers occur.

AI Model Token Pricing

Explore Full AI Model Pricing Directory

Compare per-token rates, prompt caching discounts, and context windows across leading LLMs (GPT-4o, Claude 3.5 Sonnet, Gemini 2.5 Flash, DeepSeek, and more) in our verified catalog.

Browse AI Models Directory Sonnet vs GPT-4o Cost Benchmark

Pre-built Automation Pipelines

Chain cURL to Code Converter with other utilities in a multi-step visual workflow.

intermediate

development