Write expressive, high-performance parsers with ease.

• UpdatedNov 5, 2025
• Rust

DFA regular expression library & friends

• UpdatedNov 5, 2025
• C

A minimalist single-header library for building pattern-matchers, lexers, and parsers.

• UpdatedJun 16, 2025
• C++

Nice parsers in OCaml without the boilerplate

• UpdatedMay 6, 2024
• OCaml

Tokenization for Julia source code

• UpdatedApr 23, 2024
• Julia

Lex is an implementation of lex tool in Ruby.

• UpdatedMar 17, 2024
• Ruby

Platform for parser generators and other grammarware research and development. GLL, RNGLR, graph parsing algorithms, and many others are included.

• UpdatedJul 25, 2019
• F#

Basic Parser in Emacs Lisp.

• UpdatedSep 16, 2025
• Emacs Lisp

.NET Standard library for parsing and generating Graphviz DOT files.

• UpdatedJun 26, 2020
• C#

• UpdatedAug 5, 2021
• Go

Lexical analyzer for Javascript developers

• UpdatedJun 10, 2018
• JavaScript

A simple stack-based Virtual Machine in C#

• UpdatedJun 23, 2017
• C#

😈 Automates devilries to make you even more happy together with Ragel and Go

• UpdatedMay 25, 2019
• Go

interactive parsing in GoKi / GoGi framework -- makes parsing fun again!

• UpdatedJan 25, 2024
• Go

FastPy is a statically typed programming language with pythonic syntax.

• UpdatedAug 8, 2022
• Python

🌳 Python lexer that can remember tokens and state and only reparse changed parts of a text document

• UpdatedJun 10, 2023
• Python

🍪 Lexer step + parser combinators + great error messages [nibble fork]

• UpdatedDec 31, 2024
• Gleam

A teeny-tiny-weeny lexer written in Swift available as a Swift Package.

• UpdatedMar 6, 2025
• Swift

Lexer generator for Rust

• UpdatedMar 29, 2025
• Rust

Fast, RFC-4180 compliant, CSV lexing.

• UpdatedDec 14, 2024
• Haskell