Convert a cURL PUT request to C#
Paste any curl PUT command and get clean C# code using HttpClient. Runs entirely in your browser — headers, auth, and JSON bodies map to idiomatic C#.
Quick answer
To convert a cURL command to C#, paste it into the Toolpaper workbench below. It parses the command in your browser and emits idiomatic C# 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 C# reference, or jump to the same guide in JavaScript, Node.js, or Python.
using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
class Program {
static async Task Main() {
using var handler = new HttpClientHandler { AllowAutoRedirect = false };
using var client = new HttpClient(handler);
using var request = new HttpRequestMessage(new HttpMethod("PUT"), "https://api.example.com/users/42");
request.Content = new StringContent("{\"name\":\"Ada Lovelace\"}", Encoding.UTF8, "application/json");
using var response = await client.SendAsync(request);
var text = await response.Content.ReadAsStringAsync();
Console.WriteLine(text);
}
}Example
A representative curl command for this scenario. Paste your own above to convert an exact match.
curl -X PUT https://api.example.com/users/42 \
-H "Content-Type: application/json" \
-d '{"name":"Ada Lovelace"}'Implementation notes
- Request-line method (PUT) and target URL are extracted from the curl command exactly as written — no case-folding, no path rewriting.
- Every -H header maps to a C# 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 HttpClient supports it.
- Request bodies are parsed against Content-Type: JSON bodies use idiomatic serialization (HttpClient), 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 PUT 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 PUT request in C#?
- Paste your curl PUT command above. Toolpaper generates C# using HttpClient with headers, query string, and (where applicable) request body wired up.
- Does the PUT generator handle authentication?
- Yes — Authorization headers, Bearer tokens, Basic auth (-u), and API keys pass through to the generated C# 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 C#
C# hub →The same guide in other languages
All guides →Full C# reference on the cURL to C# hub, or open the main converter for all 18 targets.