ast

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A grammar describes the syntax of a programming language, and might be defined in Backus-Naur form (BNF). A lexer performs lexical analysis, turning text into tokens. A parser takes tokens and builds a data structure like an abstract syntax tree (AST). The parser is concerned with context: does the sequence of tokens fit the grammar? A compiler is a combined lexer and parser, built for a specific grammar.

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prettier /prettier

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Star51.3k

Prettier is an opinionated code formatter.

javascript css html graphql markdown flow yaml less json formatter angular typescript printer vue jsx scss prettier ast

UpdatedDec 16, 2025
JavaScript

babel /babel

Sponsor

Star43.8k

🐠 Babel is a compiler for writing next generation JavaScript.

javascript babel es6 compiler es2015 ast flavortown

UpdatedDec 16, 2025
TypeScript

postcss /postcss

Star28.9k

Transforming styles with JS plugins

css parser framework postcss ast

UpdatedOct 18, 2025
TypeScript

nikic /PHP-Parser

Star17.4k

A PHP parser written in PHP

php parser static-analysis ast

UpdatedDec 6, 2025
PHP

ast-grep /ast-grep

Star11.6k

⚡A CLI tool for code structural search, lint and rewriting. Written in Rust

refactoring search rust tree-sitter babel typescript command-line linter static-analysis ast codemod command-line-tool grep codereview structural-search

UpdatedDec 15, 2025
Rust

rectorphp /rector

Star10.1k

Instant Upgrades and Automated Refactoring of any PHP 5.3+ code

php ast upgrade rector instant-upgrades automated-upgrades

UpdatedDec 17, 2025
PHP

remarkjs /remark

Star8.7k

markdown processor powered by plugins part of the@unifiedjs collective

javascript markdown remark ast commonmark unified

UpdatedDec 8, 2025
JavaScript

jquery /esprima

Star7.1k

ECMAScript parsing infrastructure for multipurpose analysis

javascript parser parsing ecmascript ast esprima

UpdatedApr 16, 2023
TypeScript

Bogdan-Lyashenko /js-code-to-svg-flowchart

Star7.1k

js2flowchart - a visualization library to convert any JavaScript code into beautiful SVG flowchart. Learn other’s code. Design your code. Refactor code. Document code. Explain code.

javascript svg learning scheme es6 visualisation ast flowchart svg-flowchart

UpdatedOct 2, 2023
JavaScript

fkling /astexplorer

Star6.5k

A web tool to explore the ASTs generated by various parsers.

javascript parser babel postcss ast jscodeshift ast-explorer

UpdatedApr 26, 2024
JavaScript

thx /gogocode

Star6.1k

GoGoCode is a transformer for JavaScript/Typescript/HTML based on AST but providing a more intuitive API.

babel vue ast jscodeshift recast

UpdatedApr 11, 2024
JavaScript

javaparser /javaparser

Star6k

Java 1-24 Parser and Abstract Syntax Tree for Java with advanced analysis functionalities.

java parser code-generator code-analysis ast javadoc syntax-tree code-generation javaparser abstract-syntax-tree javasymbolsolver

UpdatedDec 17, 2025
Java

JSQLParser /JSqlParser

Star5.9k

JSqlParser parses an SQL statement and translate it into a hierarchy of Java classes. The generated hierarchy can be navigated using the Visitor Pattern

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