How do I send a POST request in Swift?

Paste your curl POST command above. Toolpaper generates Swift using URLSession with headers, query string, and (where applicable) request body wired up.

Does the POST generator handle authentication?

Yes — Authorization headers, Bearer tokens, Basic auth (-u), and API keys pass through to the generated Swift code unchanged.

Is my curl sent to a server?

No. Parsing and code generation run in your browser. Nothing is uploaded.

Can I also convert this to other languages?

Yes. Once you paste your command, the language picker lets you switch between 18 targets (fetch, axios, Python, Go, PHP, Ruby, Rust, Java, Kotlin, C#, PowerShell, Swift and more).

Convert a cURL POST request to Swift

Paste any curl POST command and get clean Swift code using URLSession. Runs entirely in your browser — headers, auth, and JSON bodies map to idiomatic Swift.

Quick answer

To convert a cURL command to Swift, paste it into the Toolpaper workbench below. It parses the command in your browser and emits idiomatic Swift code — headers, query string, request body, authentication (Bearer, Basic, API key), and cookies are all wired up automatically. No data is uploaded; conversion is fully client-side.

Prefer a different target? See the full cURL to Swift reference, or jump to the same guide in JavaScript, Node.js, or Python.

InputcURL command

MethodPOST·Headers1·Body40 B· Chars 132

OutputApple · URLSession(async/await)

import Foundation

let session = URLSession.shared
var request = URLRequest(url: URL(string: "https://api.example.com/users")!)
request.httpMethod = "POST"
request.setValue("application/json", forHTTPHeaderField: "Content-Type")
request.httpBody = "{\"name\":\"Ada\",\"email\":\"ada@example.com\"}".data(using: .utf8)

let (data, response) = try await session.data(for: request)
print(String(data: data, encoding: .utf8) ?? "")
// Note: to disable redirects, implement URLSessionTaskDelegate.urlSession(_:task:willPerformHTTPRedirection:...) and return nil.

Inspect

Example

A representative curl command for this scenario. Paste your own above to convert an exact match.

curl input

curl -X POST https://api.example.com/users \
  -H "Content-Type: application/json" \
  -d '{"name":"Ada","email":"ada@example.com"}'

Implementation notes

Request-line method (POST) and target URL are extracted from the curl command exactly as written — no case-folding, no path rewriting.
Every -H header maps to a Swift header entry; duplicates are preserved so servers that read multi-valued headers keep behaving.
Query strings in the URL stay in the URL; -G with --data-urlencode is promoted to a structured params argument where URLSession supports it.
Request bodies are parsed against Content-Type: JSON bodies use idiomatic serialization (URLSession), form bodies use URL-encoding, multipart uses -F semantics with file@ handling.
TLS flags (--insecure, --cacert, --cert) surface as inline notes so you don't ship an insecure client to production by accident.

Common mistakes

Forgetting that -X POST without a body still sends an empty body — the generated code mirrors that exactly.
Assuming curl auto-follows redirects: it doesn't. Add -L (or the generator's follow-redirects flag) if you actually need to chase 3xx responses.
Copying a Cookie header from DevTools that already encodes session state — use the Clean panel to strip session cookies before you share.

Common questions

How do I send a POST request in Swift?: Paste your curl POST command above. Toolpaper generates Swift using URLSession with headers, query string, and (where applicable) request body wired up.
Does the POST generator handle authentication?: Yes — Authorization headers, Bearer tokens, Basic auth (-u), and API keys pass through to the generated Swift code unchanged.
Is my curl sent to a server?: No. Parsing and code generation run in your browser. Nothing is uploaded.
Can I also convert this to other languages?: Yes. Once you paste your command, the language picker lets you switch between 18 targets (fetch, axios, Python, Go, PHP, Ruby, Rust, Java, Kotlin, C#, PowerShell, Swift and more).

More cURL methods in Swift

Swift hub →

GET in Swift

/how-to/curl-get-in-swift

PUT in Swift

/how-to/curl-put-in-swift

PATCH in Swift

/how-to/curl-patch-in-swift

DELETE in Swift

/how-to/curl-delete-in-swift

The same guide in other languages

All guides →

In JavaScript

/how-to/curl-post-in-javascript

In Node.js

/how-to/curl-post-in-node

In Python

/how-to/curl-post-in-python

In Go

/how-to/curl-post-in-go

In PHP

/how-to/curl-post-in-php

In Ruby

/how-to/curl-post-in-ruby

In Rust

/how-to/curl-post-in-rust

In Java

/how-to/curl-post-in-java

Full Swift reference on the cURL to Swift hub, or open the main converter for all 18 targets.