Code Formatter GitHub Repositories (2026) · Open Source Tools

A Ruby static code analyzer and formatter, based on the community Ruby style guide.

An AST-based formatter for Nushell scripts, built on Nushell's own parser

A maven plugin that automatically deploys code formatters as pre-commit git hook

Code style checking for Minitest files.

RuboCop extension focused on higher-level concepts, like checking that code reads from top to bottom

Kotlin formatter and linter in Rust, drop-in ktfmt and ktlint (2.0 and 1.8) replacements with identical output, 13-190x faster, no JVM.

An extension of RuboCop focused on code performance checks.

A RuboCop extension focused on enforcing Rails best practices and coding conventions.