peartools

C# Formatter and Beautifier

Paste cramped or messy C# and get it back with consistent braces, spacing, and indentation. The formatter is clang-format, running in your browser, so your code stays on your device.

Indent
Style

Format uses clang-format. The style and indent options apply to Format.

Result

What a C# formatter does

C# lets you put braces, spaces, and line breaks almost anywhere, so code pasted from different places can look very different. A formatter, also called a beautifier, rewrites the source with one consistent set of rules: braces in the same place, even indentation, and clean spacing around operators and properties. This tool uses clang-format and changes only the layout, never what the code does.

Why use our C# formatter

  • ·Free. No signup, no paywall, no limits.
  • ·Runs in your browser. clang-format runs locally as WebAssembly, so your code is never uploaded.
  • ·Visual Studio layout by default. Braces on their own line, 4 space indents, and indented namespaces.
  • ·Other styles too. Switch to LLVM, Google, or another style if your team prefers braces on the same line.
  • ·Syntax highlighting. The editor colours keywords, types, and strings, and lets you collapse and expand blocks.

C# formatter options

Format

Rewrites your C# with consistent braces, spacing, and indentation using clang-format. Turns cramped or messy code into clean, readable source.

Beforeclass User{public int Id{get;set;}}Afterclass User { public int Id { get; set; } }

Style

Pick the style clang-format follows. Microsoft, the default, puts each opening brace on its own line like most .NET code. LLVM and Google keep the brace on the same line.

BeforeMicrosoft, LLVM, Google...AfterYour chosen brace style

Indent

Choose 2 or 4 spaces for each level of nesting. Most C# projects use 4, which is the default here.

Before2 spaces or 4 spacesAfterYour choice per level

Namespaces

Code inside a namespace block is always indented one level, which matches how Visual Studio and dotnet format lay out C#.

Beforenamespace Demo{class A{}}Afternamespace Demo { class A { } }

When to format C# code

A formatter helps whenever C# is hard to read or needs to match a shared style. These are the cases that come up most:

  • ·Cleaning up pasted code. Fix the layout of a snippet from Stack Overflow, a tutorial, or an AI chat.
  • ·Unity scripts. Make MonoBehaviour scripts readable before you share them or ask for help.
  • ·Reviewing a pull request. Make dense code readable before you review or merge it.
  • ·Learning C#. See how well-structured C# is laid out while you are learning.

Learn more about C#

Once your C# is formatted, these references explain the language and its usual style:

Formatting C# in your own project

This tool uses clang-format, which supports C# and gives fast, consistent brace and indent layout. In a .NET project you have two options:

ToUse
The built-in .NET formatterdotnet format, which follows the rules in your .editorconfig file
The same engine as this toolclang-format -i Program.cs with a .clang-format file
Format on saveVisual Studio and VS Code with the C# extension can format on save using .editorconfig

dotnet format is what most C# teams use, because it also applies .NET naming and code style rules. Use this tool for quick cleanups, and letdotnet format enforce your project's rules.

Related formatters

If you work across languages, these formatters run the same way, right in your browser:

Frequently asked questions

What is a C# formatter?
A C# formatter takes source code that has cramped or messy spacing and rewrites it with consistent braces, spacing, and indentation so it is easy to read. This tool uses clang-format, and it only changes how the code is laid out, never what it does.
How do I format C# code online?
Paste your C# into the input box, pick a style and indentation, then click Format. The clean version appears below. Click the copy button to copy it, or download it as a .cs file.
Does formatting change how my C# program works?
No. Formatting only changes whitespace, braces, and line breaks. The classes, methods, and logic stay the same, so the program builds and runs exactly as before.
Which style matches Visual Studio?
Choose Microsoft with 4 space indentation, which is the default. It puts opening braces on their own line and indents namespace bodies, which is how Visual Studio and dotnet format lay out C# out of the box.
Is this the same as dotnet format?
No. dotnet format is the .NET command line tool, and it needs your project files to run. This tool uses clang-format, which works on a single file or snippet in the browser. For everyday brace and spacing cleanup the results are very close, but dotnet format can also apply code style rules from your .editorconfig.
Is my C# code kept private?
Yes. The formatter is clang-format compiled to WebAssembly and runs entirely in your browser. Your code is never uploaded to a server or saved anywhere, so you can safely paste in code from a private project. Once the page has loaded you can even use it offline.