#parser

An efficient, reliable parser for CommonMark, a standard dialect of Markdown

A YAML 1.2 parser and serialiser for Rust: zero unsafe, full serde integration, lossless CST editing, JSON Schema validation, 406/406 on the official test suite. Core of a six-crate ecosystem with a CLI, LSP, MCP server, WASM bindings, and a serde_yaml drop-in.

High-performance browser-grade HTML5 parser

The Open Standard for Generative UI

Loaders for big data visualization. Website:

Making parsing a breeze

Give your AI agent eyes for PDFs — structured text, tables, OCR, visual evidence, and page-level citations via MCP. Native Rust, local-first.

Typescript library for parsing crontab instructions

A unified, high-performance i18next CLI.

jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.

A way to describe data using references and links.

Markdown parser, done right. 100% CommonMark support, extensions, syntax plugins & high speed

Signatures for entire Python programs. Extract the structure, the frame, the skeleton of your project, to generate API documentation or find breaking changes in your API.

JavaScript YAML parser and dumper. Very fast.

The Elegant Parser

📝 HTML to DOM parser.

Python SDK for OCR and document parsing in the cloud with LlamaParse

Rust KeePass database file parser for KDB, KDBX3 and KDBX4, with experimental support for KDBX4 writing.

🗜 JavaScript parser, mangler and compressor toolkit for ES6+

A fast, fully typed HTML toolkit for Python. Escape, unescape, parse, select, and serialize HTML from one library, powered by a C-accelerated core.

SQL Parsers for BigData, built with antlr4.

Mermaid.js, but headless, in Rust.

Multi-protocol passive fingerprinting library: TCP/HTTP (p0f-style) + TLS (JA4-style) analysis in Rust

Low output latency streaming HTML parser/rewriter with CSS selector-based API

🐊 Pluggable and configurable JavaScript Linter, code transformer and formatter with superpowers 💪: built-in support of js, jsx, ts, markdown, yaml, toml, json and ignore. Write declarative codemods in a simplest possible way 😏

A simple Python module for parsing human names into their individual components

Simple package to extract text with coordinates from programmatic PDFs

An extended commonmark compliant parser, with bridges to docutils/sphinx

An extensive math library for JavaScript and Node.js

Create ridiculously fast Lexers