C/C++/C#/Java Formatter

Reformat C, C++, Objective-C, C#, and Java code and switch instantly between the standard style presets (LLVM, Google, Chromium, Mozilla, WebKit, Microsoft, GNU). More code tools: Python Formatter | Go Formatter | Shell Script Formatter | Code Formatter (JS/TS/PHP/TOML).
All processing happens locally in your browser — your code is never uploaded to any server.
Language:
Note: C# and Java are formatted with the LLVM/Google-derived style presets, not with Roslyn / Google Java Format — output follows the presets’ notion of these languages.
Input Code
Formatted Code
How to use: Pick the language (C / C++ / Objective-C / C# / Java), choose a style preset, paste code in the left textarea and click Process (or just type — auto-process on input).
Presets: LLVM, Google, Chromium, Mozilla, WebKit, Microsoft, GNU — the same style names used on the command line (--style=Google).
C# / Java: Formatted with the same style presets, which are inspired by but not identical to Roslyn or Google Java Format.
Syntax errors: Invalid code is reported with a precise diagnostic instead of being silently mangled.
Privacy: The formatter runs entirely inside your browser. Nothing is ever uploaded.
Brace styles and why teams argue

K&R puts the opening brace on the same line, Allman drops it to the next — neither changes what the program does, only how diffs read. A formatter’s real job is ending the argument: once one style is enforced mechanically, reviews stop drowning in whitespace noise.

Pick a style once, wire it into the formatter, and stop discussing it — consistency beats either camp’s aesthetics.