30 open-source projects similar to facebook/jscodeshift, ranked by shared indexed features. Tags may describe platforms or build tools rather than the same primary purpose. Check each project’s use case, license, and deployment requirements before treating it as a replacement.
Recast is a JavaScript AST parser and printer designed for automated code refactoring. It converts source code into abstract syntax trees that can be modified and then printed back into source code. The project focuses on formatting-preserving transformations, storing original whitespace and indentation metadata within syntax tree nodes to reconstruct code without losing its original layout. It also generates character-level source maps to maintain precise correspondences between original input and transformed output. The toolkit includes utilities for syntax tree manipulation using a visito
PostCSS is a CSS post-processor and abstract syntax tree transformation tool that parses stylesheets into a structured tree for programmatic analysis and modification. It functions as a plugin-driven pipeline where JavaScript plugins can modify, insert, or delete nodes to transform styles. The project provides a framework for building a custom plugin ecosystem to extend the CSS language with non-standard features such as loops, conditionals, and shorthand properties. It supports multi-syntax parsing through pluggable parsers and stringifiers, allowing it to process various style formats and c
OpenRewrite is an automated refactoring engine and source-to-source migration framework. It uses a lossless semantic tree parser to represent source code as type-aware trees that preserve original whitespace and formatting, enabling precise and deterministic modifications. The project utilizes a declarative refactoring pipeline where sequences of transformations are defined in YAML to resolve breaking changes and technical debt. It features type-aware pattern matching and cross-language model mapping to apply similar refactoring patterns across different programming languages. The framework
PHP-Parser is a tool that converts PHP source code into an abstract syntax tree for static analysis and programmatic manipulation. It functions as a parser, a code generator, and a static analysis framework. The project enables the programmatic construction of abstract syntax tree nodes through a fluent interface and provides the ability to transform these trees back into formatted source code. It includes a serializer that exports abstract syntax trees to JSON format and reconstructs them from strings. The toolset covers several capability areas, including namespace resolution, constant exp
Rector is an automated PHP refactoring and modernization tool designed to upgrade language versions and modernize syntax using predefined rules. It functions as a static analysis engine that inspects code structures and types to identify refactoring targets without executing the code. The project provides a framework for defining custom transformation logic to automate project-specific changes. It distinguishes itself by offering specialized capabilities for migrating legacy or custom frameworks to modern alternatives and converting docblock annotations into native language attributes. The s
This project is a comprehensive, curated directory of static analysis, linting, and security scanning utilities. It serves as a central resource for developers to discover, compare, and select tools based on specific programming languages, licensing models, and integration requirements. The directory distinguishes itself by providing deep metadata for each listed utility, including community-driven popularity rankings, maintenance status, and deployment methods. By aggregating these tools into a single searchable index, it enables teams to identify solutions for enforcing coding standards, ma
Babel is a pluggable JavaScript compiler and transpiler that converts modern ECMAScript syntax into backwards-compatible versions of the language. It functions as an abstract syntax tree manipulator, parsing source code into a hierarchical structure to traverse and modify nodes for custom code transformations. The system utilizes a plugin-driven architecture to apply specific transformation rules and supports presets that bundle multiple plugins into named configuration groups. This enables the transformation of experimental syntax and the injection of non-global polyfills to ensure consisten
UglifyJS2 is a suite of tools designed for parsing, beautifying, mangling, and minifying JavaScript code. It functions by converting source code into an abstract syntax tree to enable programmatic analysis and transformation, and it includes a dedicated generator for creating associated source maps. The project optimizes web production builds by compressing script logic and removing unreachable code. It utilizes name mangling to shorten variable and property names and implements a beautifier to reconstruct compressed scripts into a human-readable layout. The toolset covers broad capability a
This project is a comprehensive manual and educational resource focused on the Babel compiler. It serves as a documentation guide and handbook for understanding the inner workings of JavaScript compilation, specifically regarding the transformation of source code. The material provides a technical walkthrough for developing custom plugins and extensions. It covers the process of creating tailored transformations to modify how JavaScript is parsed and generated. The content encompasses the broader JavaScript compilation workflow, focusing on abstract syntax tree manipulation, code generation,
JavaParser is a library that parses Java source code up to version 12 into an Abstract Syntax Tree (AST), enabling programmatic analysis, transformation, and generation of Java code. It serves as a parser, code analyzer, code generator, comment parser, and symbol resolver, providing a unified toolkit for working with Java source at the AST level. The library distinguishes itself through several integrated capabilities that go beyond basic parsing. It includes a symbol resolution engine that resolves type and symbol references across files for accurate semantic analysis, and an error-recovery
Rubberduck is a development environment extension designed for legacy Visual Basic and Visual Basic for Applications projects. It functions as a comprehensive suite that integrates directly into the host editor to provide static code analysis, automated refactoring, and project management capabilities. The tool distinguishes itself by implementing a formal grammar-based parsing engine that transforms source code into a structured abstract syntax tree. This allows for deep static analysis, enabling the identification of defects and style inconsistencies. It further supports development workflo
ast-grep is a command-line utility and static analysis engine designed for searching, linting, and refactoring source code. It operates by identifying and transforming code blocks based on their underlying syntactic structure rather than relying on text-based or regular expression matching. The tool utilizes a language-agnostic abstraction to normalize diverse programming grammars into a unified tree structure. By employing a rule-driven engine, it allows users to define complex patterns that capture syntax nodes as variables, enabling consistent and syntactically valid modifications across e
Comby is a command-line utility designed for structural code search and transformation across diverse programming languages. It functions as a code transformation engine that identifies and modifies source code patterns by utilizing syntax-aware templates, ensuring that operations respect language boundaries such as nested blocks, strings, and comments. The tool distinguishes itself by mapping various programming languages to a unified structural representation, allowing for consistent pattern matching that ignores irrelevant whitespace and formatting. It performs these operations by executin
Standard is a suite of static analysis tools for JavaScript, comprising a linter, formatter, and a predefined style guide. It functions as a static code analyzer that scans source code for style violations and potential errors without executing the program. The project provides an automatic code fixer that rewrites source code to resolve formatting issues and enforce syntax consistency. It implements a standardized set of rules for JavaScript formatting and syntax to ensure a uniform appearance across different projects. The system covers a wide range of static analysis capabilities, includi
Roo-Code is an integrated development environment extension that functions as an autonomous software engineering agent. It connects large language models directly to your local file system and terminal, enabling the agent to interpret natural language requirements and execute complex development workflows. The project distinguishes itself through a model-agnostic orchestration layer that allows developers to connect various large language model backends to their local workspace. By utilizing an iterative tool-use loop, the agent decomposes high-level tasks into sequential steps, interacting w
Tinymist is a comprehensive suite of tools for Typst document authoring, serving as a language server, document compiler, and project manager. It provides a standardized language service via the Language Server Protocol to enable editor features such as autocompletion, navigation, and semantic highlighting. The project distinguishes itself by integrating a TCP-based live preview server for real-time visual rendering and an advanced static analysis tool that utilizes abstract syntax trees and bidirectional type checking. It also includes a project management system capable of handling multi-fi
Markdig is a high-performance Markdown processor for .NET applications that converts Markdown text into HTML or other target formats. It is a CommonMark compliant parser and extensible engine that can transform Markdown into a searchable and manipulatable abstract syntax tree. The library provides a framework for adding custom syntax and rendering logic through a modular pipeline of parsers and renderers. It supports native ahead-of-time compilation and trimming to minimize binary size. Capabilities include the generation of structured HTML with custom attributes and styling, the extraction
RLS is a language server that provides language intelligence for the Rust programming language. It implements the Language Server Protocol to enable a standardized communication layer between the Rust compiler and various editor clients. The project focuses on providing real-time code completions, symbol navigation, and type information. It also supports automated structural changes, such as workspace-wide symbol renaming, to maintain semantic correctness during refactoring. The system incorporates static code analysis for linting and formatting, alongside a mechanism for incremental compila
vimplus is a Vim configuration framework and IDE distribution that provides a set of pre-configured settings and a plugin management system. It functions as a curated collection of tools designed to standardize the development environment. The project distinguishes itself through multiple deployment methods, including a bash-based editor provisioner for multi-user configuration and a pre-configured Ubuntu-based container image for immediate environment provisioning without manual installation. The framework covers a broad range of editor capabilities, including symbol navigation, project-wid
YouCompleteMe is a completion engine and semantic code analyzer for the Vim editor. It provides an integrated suite of development tools, including a Language Server Protocol client and a semantic analyzer that utilizes Clang to offer context-aware symbols and type-based highlighting. The project distinguishes itself through specialized semantic completion for C-family languages and JavaScript, offering identifiers, snippets, and automatic imports. It provides advanced visual feedback such as inlay hints for type information and parameter names, as well as semantic highlighting based on the a
GoGoCode is an AST-based code transformation toolkit that enables developers to query, match, and rewrite JavaScript source code using jQuery-style selectors and wildcard patterns. At its core, it provides a programmatic code refactoring library that manipulates parsed AST nodes, allowing precise structural modifications without worrying about formatting differences. The toolkit also functions as a JavaScript AST query engine, finding code patterns through snippet-based matching with wildcards that capture unknown or variable-length fragments. What distinguishes GoGoCode is its callback-drive
SVGO is a Node.js vector graphics optimizer and minifier designed to reduce the file size of SVG images. It functions as a pluggable processor that strips redundant XML elements, removes unnecessary metadata, and simplifies paths to create smaller payloads. The tool utilizes a customizable engine where image data is passed through a pipeline of programmable rules and optimization presets. This architecture allows for the integration of custom plugins to apply specialized transformation rules to vector files. The system includes a command-line interface for batch file processing and recursive
js-code-to-svg-flowchart is a JavaScript source code visualizer and static code analysis tool that converts programming blocks and iterators into scalable vector graphics flowcharts. It functions as a code-to-diagram converter that maps the structural logic and sequence of operations from source files into visual representations. The system includes a command line interface for generating SVG flowcharts directly from local source code. It features a transformation engine that maps code nodes to schematic shapes and supports a sequence of images at varying abstraction levels to explain logic s
GPT-Engineer is an autonomous agent and framework designed for AI-assisted software development. It functions as a generative codebase architect that translates natural language requirements into complete, functional software projects by reading and writing files directly to the local file system. The platform distinguishes itself through an agentic workflow orchestrator that sequences complex programming tasks into manageable, iterative steps. It supports multi-modal input processing, allowing users to incorporate visual data like screenshots or diagrams to guide UI generation. Furthermore,
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 comprehensive educational resource designed to help developers master object-oriented design and architectural patterns. It serves as a structured reference for understanding how to organize classes and objects to improve code maintainability, resolve recurring development challenges, and prepare for technical engineering assessments. The guide covers the three primary categories of design patterns: creational, structural, and behavioral. Each pattern is explained through practical examples that demonstrate how to manage object instantiation, simplify complex interfaces, and
Sass is a stylesheet compilation engine and CSS preprocessor that extends standard CSS with variables, nested rules, mixins, and functions. It functions as a comprehensive design system tool, enabling developers to organize complex stylesheets into modular, reusable components while automating the transformation of advanced syntax into browser-compatible CSS. The project distinguishes itself through its sophisticated build automation and language-level extensibility. It provides robust support for programmatic style generation, including conditional logic, iterative loops, and unit-aware math
This project is a high-performance static type checker and comprehensive development toolkit for Python. It functions as a core analysis engine that identifies type inconsistencies and enforces code correctness, while simultaneously providing a language server implementation to deliver real-time diagnostics and intelligence directly within development environments. The tool distinguishes itself through a parallelized execution engine that maximizes performance across large-scale codebases and monorepo structures. It supports gradual type adoption, allowing developers to integrate type checkin
This project is a collection of simplified explanations and code implementations for common software design patterns using JavaScript. It serves as a guide for implementing creational, structural, and behavioral design patterns to solve software architecture problems. The resource categorizes patterns into three primary groups. Creational patterns focus on flexible object instantiation and resource management. Structural patterns organize object relationships and interfaces to form efficient structures. Behavioral patterns manage communication and interaction between objects. The material co
Swift Evolution serves as the central governance and design platform for the Swift programming language. It provides a structured, collaborative framework for tracking, discussing, and managing the formal proposals and technical goals that define the language's syntax, semantics, and core features. By maintaining a comprehensive collection of design documentation, the project ensures the long-term stability and consistency of the language as it matures. The repository acts as the primary hub for the language's evolution, coordinating community feedback and technical decisions through a transp