cURL to Haskell Converter

Convert curl commands to Haskell code using http-conduit. Paste a command and the Haskell snippet appears instantly — everything runs in your browser.

Instant ConversionCode updates as you type
Multiple Languages40 languages, 61 libraries
100% Client SideYour data stays private

Enter cURL Command

Paste your cURL command below or try an example

cURL command

curl https://example.com

Select Programming Language

Choose the language to convert your cURL command

Haskell Code

Generated Haskell code using http-conduit

Library

http-conduit

{- cabal:
build-depends: base, bytestring, http-conduit
-}
{-# LANGUAGE OverloadedStrings #-}

import qualified Data.ByteString.Lazy.Char8 as L8
import Network.HTTP.Simple

main :: IO ()
main = do
  initReq <- parseRequest "GET https://example.com"
  let request = initReq
  response <- httpLBS request
  print (getResponseStatusCode response)
  L8.putStrLn (getResponseBody response)

{- cabal:
build-depends: base, bytestring, http-conduit
-}
{-# LANGUAGE OverloadedStrings #-}

import qualified Data.ByteString.Lazy.Char8 as L8
import Network.HTTP.Simple

main :: IO ()
main = do
  initReq <- parseRequest "GET https://example.com"
  let request = initReq
  response <- httpLBS request
  print (getResponseStatusCode response)
  L8.putStrLn (getResponseBody response)

GET example.com 0 headers no body15 lines · Main.hs

Quick Examples

Pick an example, then press Use This Example

GET Request

curl -H 'Accept: application/json' https://api.example.com/users

Copy any request as cURL

1Open your browser's DevTools and go to the Network tab.
2Right-click (or Ctrl-click) the request you want.
3Choose Copy → Copy as cURL (in Chrome pick the bash version).
4Paste it into the Enter cURL Command box above.

This works in Chrome, Edge, Firefox and Safari.

Careful: copied commands often contain cookies or tokens. Remove them before sharing the code — sharing a session cookie is like sharing your password. Conversion happens entirely in your browser.

40 languages · 61 libraries · nothing you paste leaves your browser.

How to use this tool

Copy a curl command — from API documentation, or from your browser's DevTools (Network tab → right-click a request → Copy as cURL (bash)).
Paste it into Enter cURL command. The Haskell http-conduit code appears instantly.
Set up: Install GHC and cabal (for example with GHCup). The dependencies are listed in the {- cabal: -} block at the top of the code.
Run it: Save the code as Main.hs and run cabal run Main.hs. Replace placeholders such as YOUR_TOKEN first, and check any notes under the editors for curl options that have no http-conduit equivalent.

Example

GET with headers → Haskell http-conduit

curl command

curl 'https://api.example.com/v1/users?page=2' \
  -H 'Accept: application/json' \
  -H 'Authorization: Bearer YOUR_TOKEN'

Haskell http-conduit

{- cabal:
build-depends: base, bytestring, http-conduit
-}
{-# LANGUAGE OverloadedStrings #-}

import qualified Data.ByteString.Lazy.Char8 as L8
import Network.HTTP.Simple

main :: IO ()
main = do
  initReq <- parseRequest "GET https://api.example.com/v1/users?page=2"
  let request
        = setRequestHeader "Accept" ["application/json"]
        $ setRequestHeader "Authorization" ["Bearer YOUR_TOKEN"]
        $ initReq
  response <- httpLBS request
  print (getResponseStatusCode response)
  L8.putStrLn (getResponseBody response)

Common use cases

Haskell CLIs and services
Scripts that call REST APIs

Converting curl to Haskell http-conduit

http-conduit provides Network.HTTP.Simple, the usual way to make HTTP requests in Haskell. The code parses the method and URL with parseRequest, adds headers and a body with setRequest… functions, and sends it with httpLBS.

The converter reads the curl command the way curl does — the method (-X), headers (-H), request bodies (-d, --data-raw, --json, -F), query strings, basic auth (-u) and cookies — and writes the equivalent http-conduit code. Options that have no http-conduit equivalent are listed under the editors rather than silently dropped.

Limitations

The code is a starting point: add timeouts, retries and error handling for production use.
Secrets in the curl command are copied into the code — move them to environment variables before committing.

Frequently asked questions

Why OverloadedStrings?

It lets string literals be used as ByteString headers and bodies. Text that isn't plain ASCII is UTF-8 encoded with TE.encodeUtf8, because a ByteString literal would keep only the low byte of each character.

Does httpLBS throw on 404 or 500?

No. parseRequest doesn't throw on error status codes, so the code prints the status for you to check. parseRequestThrow throws instead.

How do I decode a JSON response?

Use httpJSON with a type that has an aeson FromJSON instance instead of httpLBS.

Is my curl command sent to a server?

No. The conversion runs entirely in your browser, so tokens and passwords in the command never leave your device. Still, replace real secrets before sharing the generated code.