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Top 17 TypeScript Parsing Projects
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Tailwind CSS keeps styling consistent and fast. The utility-first approach means I don't waste time naming classes or managing CSS organization. With the Vite integration and PostCSS transformations, the build stays lean.
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Project mention: Three Ways to Convert JSON to TypeScript. Only One Is Deterministic. | dev.to | 2026-04-27
5. Add runtime validation. Use Zod or Valibot to validate that the API actually sends what your types describe. The converter gives you structure; a schema library gives you runtime guarantees.
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First, define your contract with full type safety using schema validation libraries like Zod, Valibot, or ArkType:
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Hasn't that already been tried (10+ years ago) with projects like https://github.com/jquery/esprima ? Which have since seen usage dramatically reduced for performance reasons.
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parse5
HTML parsing/serialization toolset for Node.js. WHATWG HTML Living Standard (aka HTML5)-compliant.
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Project mention: Parsing Filter Expressions in NestJS with a Context-Free Grammar | dev.to | 2026-03-25
Before you can parse, you need a lexer, something that turns a raw string into a stream of tokens. In nestjs-filter-grammar this is done with Chevrotain, a parser building toolkit for TypeScript.
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Project mention: Friday Links #30 — JavaScript Updates, Tools, and Inspiration | dev.to | 2025-10-17
jsonriver - A simple, fast streaming JSON parser built on standards.
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antlr-ng
The next generation of ANTLR, a powerful parser generator for reading, processing, executing, or translating structured text or binary files.
Their GitHub readme has a section answering this.
https://github.com/antlr-ng/antlr-ng#future
Basically they feel the main problem with the original antlr is it’s being stifled by its batteries included nature. They’re hoping that splitting it will make each of the runtimes more agile. They don’t mention why the core was rewritten rather than just forking the original.
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
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A note from our sponsor - SaaSHub
www.saashub.com | 5 Jun 2026
Index
What are some of the best open-source Parsing projects in TypeScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | PostCSS | 28,955 |
| 2 | valibot | 8,739 |
| 3 | arktype | 7,770 |
| 4 | esprima | 7,132 |
| 5 | llama_cloud_services | 4,249 |
| 6 | parse5 | 3,899 |
| 7 | Chevrotain | 2,778 |
| 8 | jsonriver | 1,202 |
| 9 | kataw | 336 |
| 10 | parsec 🌌 | 206 |
| 11 | antlr-ng | 124 |
| 12 | dto-classes | 82 |
| 13 | fefe | 39 |
| 14 | epub-wordcount | 34 |
| 15 | json-stream-es | 20 |
| 16 | teg | 13 |
| 17 | monch | 10 |
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