C# Editor

How it works

How to use the C# Editor

1. Write or open code

   Type, paste, drop a file or press Sample. Syntax highlighting, bracket matching and search (Ctrl F) are built in.

2. Edit comfortably

   Line numbers, code folding, multiple cursors and undo history work like a desktop editor. Your text is saved in this browser automatically.

3. Save your work

   Copy it or download it as a file with the right extension.

About the C# Editor

Edit C# source online with syntax highlighting, bracket matching and folding.

Built for developers

Why developers use it

• Private by design

  Runs 100% in your browser. Nothing you paste is uploaded, logged or stored on a server.

• Instant results

  Output updates as you type, with precise error locations when something is wrong.

• Works offline

  Once loaded, the tool keeps working without a connection. Install it as an app if you like.

• Free, no sign-up

  No accounts, no limits, no watermarks.

FAQ

Frequently asked questions

Keep going

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