AST-grep, a grep/eslint/codemod hybrid tool, powered by tree-sitter.

In plain words

AST-grep is a command-line tool that searches, lints, and rewrites code using abstract syntax tree analysis powered by tree-sitter. It combines the functionality of grep, ESLint, and codemod tools into a single utility. Designed for developers who need to find patterns in code and make large-scale refactoring changes, AST-grep enables syntax-aware code inspection and transformation across multiple programming languages.

written from the facts on this page · September 2026

From the sources

ast-grep is a fast and polyglot tool for code structural search, lint, rewriting at large scale.

ast-grep(sg) is a fast and polyglot tool for code structural search, lint, rewriting at large scale. ast-grep is a code tool for structural search and replace . It is like syntax-aware grep/sed! You can write code patterns to locate and modify code, based on AST, in thousands of files, interactively . ast-grep is a versatile and flexible tool for linting code with AST patterns. You can easily add new customized rules with intuitive syntax and enjoy pretty error reporting out of box. ast-grep also provides node-js binding to access syntax trees programmatically. You can use jQuery like utility methods to traverse syntax tree nodes. Node API also has opt-in type safety . Blazing fast search…from ast-grep.github.io

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  ast-grep2023 · ast-grep.github.io · ▲66

  A polyglot tool for code searching, linting, rewriting

• SC
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  Code search made fast

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  Structural code grep across public GitHub repositoriesAug 2026 · grep.codemod.com · ▲15

  Codemod grep searches public code by syntax and structure, not just text or regex. Use ast-grep patterns to find code by shape across repositories.

• AI
  Anyone interested in a tool helps to explore C++ ASTsMay 2026 · uvic-aurora.github.io · ▲49

  I built this software to help users who need to do static code analysis for C/C++ codebase. This can help you to explore the ASTs interactively. It can replace the Clang ast dump completely and also you can search the code/ASTs in a structual way. For example you can search a function which matches specific name or number of paremeters.

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  Much improved new version. Search for words similar to the query. For example, "death" will find "death", "dying", "dead", "killing"... Incredibly useful for exploring large text datasets where exact matches are too restrictive.

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