Unsupported input
The tool may reject input that does not match the expected content, structure, or file type.
Fix: Confirm the tool input requirements and paste the correct type of data.
header • up to 320x100 / 728x90
Edit C# code with syntax highlighting and a split-view inspector for source review and quick file stats.
Use a code-focused preview with file stats and read-only output inspection.
content bottom • up to 300x250
sidebar • 160x600
Last reviewed:
C# is a modern, statically typed language from Microsoft used to build .NET applications, games with Unity, and cross-platform services.
C# Editor is an online tool that helps you edit C#.
It lets you edit C# with inline validation and a preview so small fixes do not require a full IDE.
Start with the C# input you want to process in C# Editor.
Get a C# result from C# Editor that is ready to review, copy, and reuse in the next step of your workflow.
The tool may reject input that does not match the expected content, structure, or file type.
Fix: Confirm the tool input requirements and paste the correct type of data.
Missing fields or partial content can block processing or produce weak results.
Fix: Provide the full required input before running the tool.
Sample or placeholder values can lead to output that looks valid but is not ready for real use.
Fix: Replace placeholders with your actual values before relying on the result.
Yes — Monaco inherits the VS Code keymap, so Cmd/Ctrl-F (find), Cmd/Ctrl-D (multi-cursor), Alt+Up/Down (move line), and most other familiar shortcuts work as expected.
C# Editor is comfortable with files up to ~10 MB. Beyond that, Monaco's tokenizer starts to slow down on low-end devices — split the file or use a native editor for multi-MB single files.
Yes. C# Editor exposes copy-to-clipboard and file download, plus round-trip conversion to the related formats (e.g., JSON editor can export to YAML or XML) so you don't need to chain three tools.
Yes. C# Editor follows the site's theme, which respects your OS "prefers-color-scheme" setting. Toggle manually with the theme switch in the header.
C# Editor doesn't upload drafts anywhere — your content stays local. To share, export the file or copy the content into a gist, pastebin, or your own document store.
Continue the workflow with related tools for C#, adjacent input and output steps, or other utilities in the same category. You can also browse the full Editors category for more options.
Edit Java code with syntax highlighting and a split-view inspector for source, structure, and quick review.
Edit JavaScript with syntax highlighting and a split-view inspector for source review and quick metrics.
Edit JSON with syntax highlighting, validation, and a structured preview in a split-view editor for cleaner inspection.
Edit Python code with syntax highlighting and a split-view inspector for source review and quick metrics.
Edit SQL with syntax highlighting, formatted output, and a split-view workbench for query inspection.
Edit XML with syntax highlighting, parsing feedback, and a structured preview in a split-view editor.
Edit YAML with syntax highlighting, parsing feedback, and a structured preview in a split-view editor.
Edit HTML with live preview
Format and beautify C# code online with proper indentation and .NET coding style. Paste C# and get clean, readable output following best practices.
Pretty-print C# source with syntax highlighting — handy for code reviews and snippets
Convert JSON payloads to C# classes with List<T> and proper PascalCase property names
Escape strings for C#