1.web-platform-tests / wptTest suites for Web platform specs — including WHATWG, W3C, and otherstestinghtmltest-automationbrowserw3cwhatwg+13 moreHTMLOther license6.3K total4K forks+446 starsfrom 5,857 · score 6.10
2.mixmark-io / turndown🛏 An HTML to Markdown converter written in JavaScriptjavascripthtmlmarkdownhtml-to-markdownbrowsernode+2 moreHTMLMIT12K total999 forks+416 starsfrom 11,083 · score 6.03
3.Metnew / uxss-db🔪Browser logic vulnerabilities :skull_and_crossbones:securitybrowserxssvulnerabilitycvejavascriptHTMLMIT705 total84 forks+10 starsfrom 695 · score 2.40