How it works
How to use the C++ Formatter
Paste or open your input
Type, paste or drop a file into the left editor — or press Sample to try it.
Adjust the options
Use the options in the toolbar; the result updates as you type.
Copy or download the result
Copy the output or download it as a file.
About the C++ Formatter
Format modern C++ with clang-format in Google, LLVM, Chromium, Mozilla, WebKit, Microsoft or GNU style, with your own indent width and column limit.
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
Does my code leave my computer?
No. Formatting, minifying and validation run entirely in your browser with open-source engines, so proprietary code stays private.
Is my data uploaded anywhere?
No. Everything runs locally in your browser — nothing you type, paste or open is sent to a server, logged or stored. The tool keeps working offline once the page has loaded.
Keep going
Related tools
- Python FormatterFormat Python code like Black
- TypeScript FormatterBeautify and format TypeScript code
- PHP FormatterBeautify and format PHP code
- C# FormatterBeautify and format C# code
- Java FormatterBeautify and format Java code
- GraphQL FormatterBeautify and format GraphQL code
- JSON FormatterFormat, validate and explore JSON
- SQL FormatterBeautify or minify SQL for 16 dialects