CSS Formatter

The CSS Formatter is a developer tool that standardizes CSS source into a single, readable style across codebases. It accepts CSS and CSS-like input, then outputs a consistent formatting that aligns braces, indentation, and property order with a team style guide. This reduces churn during code reviews, minimizes diffs between branches, and helps teams maintain a shared visual standard. It targets frontend developers, build engineers, and design-system teams integrating formatting into editors, pre-commit hooks, or CI pipelines. The tool focuses on producing reliable formatting without altering values or semantics.
Conceptually, the formatter tokenizes the input, builds a representation of selectors, declarations, and at rules, and then reserializes the structure with configurable options. Core features include adjustable indentation, semicolon normalization, comment preservation, and handling of media blocks and supports blocks. Advanced options enable sorting of properties or selectors, removing duplicate declarations, and producing expanded or compact outputs. The tool is deterministic, so identical inputs under the same settings always yield the same formatted output, helping teams compare changes more easily.
Key use cases include codebase onboarding for new contributors, ensuring cohesive style in multi-author projects, and preparing third party CSS for integration. The formatter does not validate semantics or compile code; it only reformats structure and values. It can be invoked from editors, CI pipelines, or automation scripts. Its distinctive value lies in consistent spacing, predictable diffs, and compatibility with common CSS features while preserving comments and original values.