Are my files uploaded to a server?

No. OpenEdit processes everything locally in your browser using Web APIs, so your file never leaves your device.

Is this tool free to use?

Yes. Every OpenEdit tool is free, requires no account and adds no watermark to your exports.

Can I create a new C# file from scratch?

Yes. Use the “Start a blank C# file” button and you get an empty .cs buffer with C# highlighting already enabled.

Online C# Editor

Edit C# files with syntax highlighting and structural folding. OpenEdit runs the same editor engine as VS Code directly in your browser tab — open a .cs file or start from a blank one, and nothing is ever uploaded.

Drop your file here

Supports CS · processed locally

How to use the C# Editor

1Drop a .cs file in, or click “Start a blank C# file”.
2Edit with full keyboard shortcuts and multi-cursor support.
3Use diff view to compare against what you started with.
4Export the file back to your device.

Features

C# syntax highlighting and bracket matching
Multi-cursor editing, find and replace
Side-by-side diff against the original file
Autosave to local storage and one-click export
Works offline once the page has loaded

Frequently asked questions

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