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Free online C/C++ code formatter and beautifier. Quickly standardize indentation, brace styles, and format your C and C++ code instantly.
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
This tool reformats source text for readability or compresses whitespace. It accepts pasted C/C++ text and does not build, compile, execute, or certify the program. A cleaner layout is not evidence that code is syntactically valid or behaves correctly.
Beautify mode lets you choose 2, 4, or 8 indentation spaces, spaces or tabs, and Allman or K&R brace placement. You can also request comment removal. Minify mode compacts whitespace and removes comments. These are a small set of formatting controls, not a complete style configuration system. Established formatter configurations such as clang-format offer more project-level options.
Formatting changes layout. Removing comments also removes explanatory text, so keep a copy of the original when comments may matter.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Use a snippet or source text you are comfortable processing in the page. Preserve the original in your editor or version control before applying a result.
Choose Beautify to set indentation, tab or space use, brace placement, and the optional comment-removal setting. Choose Minify to compact the text; minify mode removes comments.
Compare braces, preprocessor lines, strings, comments, and line breaks with the original. The tool’s output is a text transformation, not a compiler diagnostic.
Move the reviewed text to your normal development workflow, then run the project’s compiler, tests, and formatter or style checks as required.
In beautify mode, comment removal is optional. In minify mode, comments are removed as part of the operation. Comments can document assumptions, licenses, or instructions; deleting them may change the meaning of the file to people and tools even though comments are not executable statements.
Use cases
See how the tool fits into real work and everyday tasks.
A learner can expand a compressed code sample to make indentation and brace structure easier to inspect before studying the syntax.
A contributor can apply a consistent brace and indentation choice to a short pasted excerpt, then inspect the diff in the project’s usual tools.
A maintainer can compact a disposable copy or remove comments for a specific text-processing task, after preserving any license or documentation that must remain.
Q&A
Find concise answers to common questions and confusing cases.
No. It changes text layout and does not compile, run, or validate program behavior.
No project configuration is loaded. The available choices are indentation width, tabs or spaces, brace style, comment removal, and beautify or minify mode.
No. Minify mode removes comments. Beautify mode provides a separate option to remove comments; otherwise the chosen beautify setting controls whether they are kept.
A project may use rules beyond this page’s controls. Apply the project’s configured formatter and review its diff when matching a team standard matters.
Notes
Review scope, result limitations, and important precautions before use.
Do not treat formatting as a syntax, security, or quality review. Check output carefully, especially around macros, strings, unusual syntax, and comments, and validate it with the project’s compiler and tests. Comment removal may discard license notices or documentation; preserve the original and retain required notices.
LLVM’s clang-format documentation describes a configurable C/C++ formatting workflow. This page does not load that tool’s style files or promise conformance to a named coding standard. Checked September 29, 2026.
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