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 / prettier

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Prettier is an opinionated code formatter.

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

Updated Sep 1, 2025
JavaScript

babel / babel

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🐠 Babel is a compiler for writing next generation JavaScript.

javascript babel es6 compiler es2015 ast flavortown

Updated Aug 29, 2025
TypeScript

postcss

postcss / postcss

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Transforming styles with JS plugins

css parser framework postcss ast

Updated Aug 26, 2025
TypeScript

nikic / PHP-Parser

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A PHP parser written in PHP

php parser static-analysis ast

Updated Aug 19, 2025
PHP

rectorphp / rector

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Instant Upgrades and Automated Refactoring of any PHP 5.3+ code

php ast upgrade rector instant-upgrades automated-upgrades

Updated Sep 1, 2025
PHP

ast-grep

ast-grep / ast-grep

Star 9.6k

⚡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

Updated Aug 31, 2025
Rust

remarkjs / remark

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markdown processor powered by plugins part of the @unifiedjs collective

javascript markdown remark ast commonmark unified

Updated Apr 18, 2025
JavaScript

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

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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

Updated Oct 2, 2023
JavaScript

jquery / esprima

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ECMAScript parsing infrastructure for multipurpose analysis

javascript parser parsing ecmascript ast esprima

Updated Apr 16, 2023
TypeScript

fkling / astexplorer

Star 6.4k

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

javascript parser babel postcss ast jscodeshift ast-explorer

Updated Apr 26, 2024
JavaScript

thx / gogocode

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

babel vue ast jscodeshift recast

Updated Apr 11, 2024
JavaScript

javaparser / javaparser

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Java 1-21 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

Updated Aug 31, 2025
Java

JSQLParser / JSqlParser

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