Open source parser projects
Every project in the registry tagged parser, ranked by real GitHub adoption.
jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.
An extremely fast CSS parser, transformer, bundler, and minifier written in Rust.
Trigger functions or evaluate cron expressions in JavaScript or TypeScript. No dependencies. Most features. Node. Deno. Bun. Browser.
Frequently asked questions
How many open source parser projects are there?
This registry tracks 3 projects tagged parser, with 21,663 GitHub stars between them. The most-adopted is jsoup at 11,394 stars.
Are these parser projects free to use?
Yes — 3 of the 3 carry an explicit open-source licence across 2 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which parser project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these parser projects still maintained?
3 of the 3 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.