How do I use a html encoder in C# / .NET?

C# / .NET provides built-in or community packages for html encoder functionality. See the code example above for a production-ready pattern you can copy into your project.

Is there a recommended html encoder library for C# / .NET?

Yes. The code example above shows the most widely-used approach in the C# / .NET ecosystem. For client-side use cases, you can also use DevToolHQ's online html encoder at devtoolhq.com/tools/html-encoder.

Can I use DevToolHQ's html encoder with C# / .NET?

Absolutely. DevToolHQ's html encoder runs 100% client-side in your browser, making it perfect for quick debugging during C# / .NET development. No data is sent to any server.

Last updated: April 13, 2026

HTML Encoder for C# / .NET Developers

Quick Answer

DevToolHQ's html encoder works great alongside C# / .NET. Use it to quickly html encoder during development, then integrate the pattern into your C# / .NET codebase using the code example below.

Use Cases in C# / .NET

1.Use HTML Encoder in C# / .NET projects

C# / .NET Code Example

C# / .NET

using System.Web;
using System.Net;

// Encode for HTML attribute/body
string input = "<script>alert("xss")</script>";
string encoded = HttpUtility.HtmlEncode(input);
Console.WriteLine(encoded);
// &lt;script&gt;alert(&quot;xss&quot;)&lt;/script&gt;

// Decode
string decoded = HttpUtility.HtmlDecode(encoded);

// WebUtility (works in all .NET environments, not just ASP.NET)
string safe = WebUtility.HtmlEncode(input);
string back = WebUtility.HtmlDecode(safe);

Try the tool directly

Free, no signup — works in your browser

Open Html Encoder

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