C++ Formatter

A precise C++ formatter that standardizes style and indentation for C++ source code, improving readability and consistency across teams and CI pipelines.

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660+
Total Calculations Run
< 15ms
Browser Execution Speed
100%
Client-Side Privacy
4.9 / 5.0
User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how C++ Formatter processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}
Computed Result { "id": 1, "status": "active", "roles": [ "admin" ] }
Execution Mode Client-Side In-Browser JS
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About This Tool

The C++ Formatter provides deterministic, language-aware formatting for C++ source files. It targets teams seeking consistent style, reduces churn from manual edits, and integrates with build pipelines and code reviews. It emphasizes preserving semantics while reflowing formatting according to the selected style preset.
The formatter relies on a language-aware parser to interpret C++ constructs and a style engine to apply indentation, spacing, and wrapping rules. It supports multiple presets (LLVM, Google, GNU, Chromium) and allows configuration of line length, alignment, and operator spacing. It processes comments and macro blocks carefully to avoid altering meaning.
Core value comes from deterministic results, multi-style support, and CI-friendly output that can be diffed and reviewed before commits. It is suitable for large repositories, code reviews, and onboarding new contributors who need code that conforms to the project’s standards.
Advanced users can enable batch formatting, scoped formatting regions, and diff reporting to minimize churn and maximize traceability. The tool does not perform semantic refactoring or compilation; it focuses solely on formatting consistency and readability.

How to Use

Provide inputs: paste C++ source code, select language standard, style preset, and optional max line length.
Configure: adjust options such as formatting scope and wrap behavior.
Run formatting: execute the formatter to produce reformatted code.
Review outputs: compare the formatted code and the diff metadata.
Integrate: apply in CI/pre-commit workflows to enforce consistency.

How to use formatter for c++

Frequently Asked Questions

Find Quick Answers

How does it handle comments and preprocessor lines?
Comments are preserved and associated with the surrounding code blocks. Preprocessor directives are kept in place and reformatted to align with the chosen style without altering their semantics.
Is output deterministic for the same input and settings?
Yes. Given identical input code and formatting options, the formatter produces an identical output every time, enabling reliable diffs and reviews.
Can it format large codebases or multiple files?
Yes. It supports batch processing via file lists or streaming inputs and can emit per-file diffs to facilitate integration into CI workflows.
Which style presets are supported and can I customize them?
Presets include LLVM, Google, GNU, and Chromium. Custom presets and parameter overrides are supported to tailor spacing, indent, and line-wrapping rules to project needs.

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