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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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ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.
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Feb 16, 2026 - Java
Rust parser combinator framework
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Aug 26, 2025 - Rust
A querystring parser and serializer with nesting support
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Jun 8, 2026 - JavaScript
Parse and stringify URL query strings
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May 29, 2026 - JavaScript
Lark is a parsing toolkit for Python, built with a focus on ergonomics, performance and modularity.
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Jun 7, 2026 - Python
SwiftSoup: Pure Swift HTML Parser, with best of DOM, CSS, and jquery (Supports Linux, iOS, Mac, tvOS, watchOS)
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Jun 15, 2026 - Swift
Smarter YAML front matter parser, used by metalsmith, Gatsby, Netlify, Assemble, mapbox-gl, phenomic, vuejs vitepress, TinaCMS, Shopify Polaris, Ant Design, Astro, hashicorp, garden, slidev, saber, sourcegraph, and many others. Simple to use, and battle tested. Parses YAML by default but can also parse JSON Front Matter, Coffee Front Matter, TOM…
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Jun 14, 2025 - JavaScript
Makes life working with units of measurement just a little bit better.
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Jun 11, 2026 - C#
Html Agility Pack (HAP) is a free and open-source HTML parser written in C# to read/write DOM and supports plain XPATH or XSLT. It is a .NET code library that allows you to parse "out of the web" HTML files.
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Oct 15, 2025 - C#
Get unified metadata from websites using Open Graph, Microdata, RDFa, Twitter Cards, JSON-LD, HTML, and more.
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Jun 17, 2026 - HTML
📝 HTML to React parser.
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Jun 16, 2026 - TypeScript
small, safe, and great commonmark (optionally gfm, mdx) compliant markdown parser
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May 10, 2025 - JavaScript
Blazing fast and Comprehensive CSV Parser for Node.JS / Browser / Command Line.
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Jan 22, 2026 - TypeScript
The Android SDK for Parse Platform
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Apr 4, 2026 - Java
Tika-Python is a Python binding to the Apache Tika™ REST services allowing Tika to be called natively in the Python community.
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Jun 10, 2026 - Python
CommonMark compliant markdown parser in Rust with ASTs and extensions
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Apr 23, 2025 - Rust
Declarative binary reading and writing: bit-level, symmetric, serialization/deserialization
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May 14, 2026 - Rust
The JavaScript SDK for Parse Platform
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Jun 17, 2026 - JavaScript
一款UI自动生成代码插件,提供UI自动生成代码全流程解决方案。
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Sep 22, 2025 - TypeScript