Open-source alternatives to Prettier

This tool is a command-line utility designed to automatically detect and correct coding standard violations in PHP source files. It functions as a static analysis and refactoring engine that ensures consistent project-wide formatting by applying predefined community conventions or custom organizational rules. The project distinguishes itself through a modular rule-based engine that supports both automated style correction and codebase modernization. It allows developers to update legacy syntax to align with newer language versions and testing framework requirements, facilitating the adoption

js-beautify is a web language beautifier and code formatter designed to standardize the layout and structure of JavaScript, HTML, and CSS files. It reorganizes source code into a consistent, readable style by applying configurable indentation and spacing rules. The project includes a utility for unpacking minified scripts, which transforms compressed or obfuscated JavaScript into a human-readable format. It provides a command-line interface for executing bulk code reformatting across multiple files. The tool supports customizable formatting rules and language-specific overrides, which can be

Stylelint is a static code analysis tool and linter for CSS and style-like languages. It identifies errors, enforces coding conventions, and operates as a PostCSS plugin to validate stylesheets during build pipelines. The project distinguishes itself through support for non-standard syntaxes, including preprocessor parsing for SCSS and Less, and the ability to extract and lint embedded styles from JavaScript, HTML, and template literals. It features an automated fixing system that programmatically corrects repairable styling violations to ensure consistency. The system provides a plugin arch

This project is a static analysis engine designed to identify patterns, enforce coding standards, and automate code quality improvements in software projects. By parsing source code into structured abstract syntax trees, it enables deep programmatic inspection and the automated remediation of identified programming issues. The engine functions as a pluggable linting framework, allowing developers to extend its core capabilities through a modular architecture. Users can inject custom rules, parsers, and processors to support non-standard file formats or domain-specific logic. This extensibilit

Pylint is a static code analyzer for Python that scans source code for errors, coding standard violations, code smells, and type-related issues without executing the program. It functions as a plugin-based linter framework, allowing users to extend its analysis capabilities with custom or third-party checks for project-specific rules and framework support. The tool also includes a duplicate code detector that identifies identical or near-identical code blocks across a project to help reduce redundancy. Beyond its core linting functionality, Pylint can generate UML class and package diagrams f

Standard is a zero-configuration static analyzer, linter, and formatter for JavaScript. It functions as a style guide that enforces consistent coding rules and identifies programming errors without requiring manual configuration files. The tool distinguishes itself by providing an automatic code fixer that scans source files to correct style violations and ensure a uniform codebase. It implements a predefined rule set to eliminate the need for project-specific configuration. The project covers a broad range of static analysis capabilities, including support for experimental language syntax a

Webpack is a module bundler that maps project dependencies into a directed acyclic graph to transform diverse file types into optimized, browser-ready assets. It functions as a build pipeline orchestrator, using entry points to recursively resolve imports and bundle modules, scripts, and static assets into a unified output. The project is distinguished by its plugin-based architecture and loader-driven transformation pipeline. It utilizes an event-driven hook system that allows developers to intercept and modify the build process at specific lifecycle stages, enabling custom code transformati

Spotless is a multi-language formatting orchestrator and Gradle plugin that automates code styling across various programming languages within a single build pipeline. It functions as a coordinator for multiple third-party formatters, a code style linting tool, and a system for inserting and updating standardized license headers. The project distinguishes itself through git-integrated style enforcement, using pre-push hooks and git references to apply formatting only to modified files or lines. It supports shared build configurations, allowing formatting rules to be distributed and loaded acr

This project is an uncompromising, deterministic code formatter for Python. It functions by parsing source code into an abstract syntax tree and regenerating it according to a rigid, opinionated set of style rules. By automating the formatting process, it eliminates manual style debates and configuration overhead, ensuring that code remains consistent across entire projects regardless of the original input. The tool distinguishes itself through its focus on speed and seamless integration into development workflows. It utilizes content-based file caching and parallel processing to maintain hig

mypy is a static type checker for Python that analyzes source code to detect type errors and inconsistencies without executing the program. It functions as a static analysis tool and type inference engine, providing a gradual typing system that allows type hints to be added to a codebase incrementally while maintaining compatibility with dynamic typing. The project distinguishes itself through a combination of performance and precision features. It utilizes a daemon-based incremental checking system and multi-process parallel analysis to manage large codebases, supported by binary cache persi

SwiftLint is a static analysis tool and code formatter designed to enforce consistent coding styles and identify semantic issues within Swift source code. It functions as a command-line utility that evaluates code against established conventions to ensure uniform structure and architectural standards across a project. The tool distinguishes itself through a custom linting engine that leverages compiler-integrated syntax analysis to perform deep inspections of code structure. Beyond simple pattern matching, it supports automated source code transformation to correct formatting violations and r

RuboCop is a static code analyzer and linter for Ruby. It functions as a static analysis tool designed to detect potential bugs, identify style violations, and improve overall code quality in Ruby projects. The project provides an automated code formatter that rewrites source code to align with established community standards. It also implements a language server protocol to surface linting and formatting errors directly within text editors. Its capabilities cover automated code linting and the analysis of Ruby code style to ensure consistency across a project. These functions are driven by

Vite is a frontend build toolchain that provides a unified development and production pipeline for modern web applications. It functions as a modular, environment-agnostic build engine that leverages native ES modules to serve source code directly to the browser, eliminating the need for expensive bundling during the development phase. By maintaining an environment-aware module graph, it supports concurrent development across client, server, and custom runtime environments. The project distinguishes itself through a high-performance development server that utilizes a hot module replacement pr

Ruff is a high-performance static analysis and code formatting tool designed for Python. Built in Rust, it functions as a comprehensive engine that scans source code to detect programming errors, security vulnerabilities, and deviations from established coding standards. By parsing source code into a structured tree representation, it provides both automated linting and style enforcement across entire projects. The tool distinguishes itself through its speed and deep integration into the development lifecycle. It utilizes parallelized file processing to maximize throughput on large codebases

rustfmt is a Rust code formatter that operates as a Cargo subcommand, applying consistent formatting to Rust source files according to official style guidelines. It parses source code into a syntax tree, applies formatting rules to tree nodes, and pretty-prints the result back to text, with support for TOML-driven configuration that allows per-project style customization. The formatter is edition-aware, automatically selecting formatting rules based on the Rust edition specified in the project, and supports a style edition override that decouples formatting rules from the Rust edition used fo

xo is a zero-configuration linting tool for JavaScript and TypeScript. It functions as a wrapper for the ESLint engine, providing a set of strict default rules and static analysis to enforce professional coding standards without requiring manual configuration files. The tool distinguishes itself by providing a zero-config runtime that automatically determines parser settings and linting rules at execution time. It includes a code style formatter to standardize indentation and syntax across all project files. The project covers automated error correction and source code formatting to eliminat

This project is a comprehensive collection of pre-commit hooks designed to automate code linting, style enforcement, and file validation before changes are committed to version control. It provides a suite of ready-to-use scripts that serve as quality guards, including static analysis hooks, configuration file validators, and tools for maintaining version control integrity. The collection distinguishes itself by offering specialized guards for repository health and security. This includes detection of leaked credentials and private keys, prevention of large file commits, and enforcement of br

Commitlint is a command-line utility designed to lint and validate Git commit messages against established conventions. By parsing commit messages into structured components, it ensures that project history remains consistent, which facilitates automated changelog generation and semantic versioning. The tool distinguishes itself through a schema-driven validation engine that supports custom rule definitions and plugin-based extensions. It enables standardized project governance by allowing teams to distribute and inherit shared configuration rule sets across multiple repositories, ensuring un

google-java-format is a Java code formatter and style enforcement tool. It reformats Java source code to adhere to a standardized style guide, ensuring consistent layout and indentation across entire projects or individual files. The project functions as a build pipeline linting tool for continuous integration workflows and as an IDE formatting plugin to replace native editor formatting. It can be embedded as a formatting library within code generation software to ensure machine-written output remains human-readable. The tool provides capabilities for reorganizing source code indentation and

This project is a comprehensive productivity guide and configuration reference for the VS Code editor. It provides a curated collection of shortcuts, configuration tips, and tutorials designed to improve efficiency and optimize the daily coding workflow. The resource covers advanced AI-assisted development, including the integration of autonomous agents, custom prompt files, and AI-powered coding assistants for task automation and code generation. It also provides specialized guidance on integrated terminal management, such as configuring shell profiles and automating command execution. Addi

This is a Visual Studio Code extension that integrates the Prettier formatting engine into the editor. It serves as a bridge to provide opinionated, multi-language code styling by reprinting source code from a syntax tree to enforce consistent layout and line wrapping. The extension enables automated formatting upon saving or on command, ensuring a uniform codebase across teams. It resolves styling rules by merging editor preferences, EditorConfig files, and local configuration files, and can coordinate with linters to resolve conflicting stylistic rules. The system supports a wide range of

Pre-commit is a framework for managing and executing automated tasks during the version control commit process. It functions as a configuration-driven utility that enforces project standards by running linters, formatters, and security scanners on staged files before they are committed to a repository. The system uses a centralized manifest to orchestrate these tasks, ensuring consistent developer tooling across teams. It distinguishes itself by provisioning isolated environments for each tool, which prevents dependency conflicts and ensures that all required versions are present. The framewo

This project is a build orchestration engine and development toolkit designed for managing large-scale monorepos. It provides a unified workspace environment that maps project relationships and dependencies, enabling the system to perform intelligent impact analysis and execute only the tasks affected by specific code changes. The system distinguishes itself through a persistent daemon that monitors file changes for near-instant feedback and a content-addressable caching mechanism that stores task outputs to prevent redundant computation across local and remote environments. It further suppor

This project is a unified, cloud-native policy engine designed to decouple authorization and security logic from application codebases. It functions as a centralized authorization service that evaluates structured input data against declarative rules, enabling consistent policy enforcement across microservices, infrastructure, and continuous integration pipelines. The engine utilizes a specialized logic programming language to express complex constraints, which are compiled into an optimized intermediate representation for high-performance evaluation. By supporting both sidecar-based deployme

Kilocode is an autonomous engineering platform designed to orchestrate AI agents for complex software development tasks. It functions as a comprehensive system for automating coding, testing, and repository management by integrating directly with your codebase and terminal. The platform provides a unified gateway for model orchestration, allowing for the management of agentic workflows, event-driven automation, and persistent session state across distributed development environments. The platform distinguishes itself through its federated task management and policy-based access control, which

Python is a high-level, interpreted programming language designed for readability and versatility. It operates via a bytecode-based virtual machine and manages memory automatically through reference-counting garbage collection. The language supports multiple programming paradigms, including object-oriented, imperative, and functional styles, and provides a comprehensive standard library for system operations, networking, and data handling. The language is distinguished by its dynamic nature, allowing for runtime object introspection and metaclass-driven class creation. It utilizes protocol-ba

Claude Code Templates is a comprehensive framework for orchestrating specialized AI agents and automating development workflows within local environments. It provides a structured system for defining, configuring, and deploying AI personas that handle specific technical tasks, ranging from backend architecture and frontend implementation to security auditing and infrastructure management. The project distinguishes itself through a configuration-driven approach that allows teams to standardize development environments and share reusable agent definitions across projects. It includes a robust C