validators
Good web sites checklist
- website crawlers
- Web Developer Checklist
- (https://webdevchecklist.com/)
- Checkbot: SEO, Web Speed & Security Tester 🚀 extension
- Web Vitals extension
- twitter card validator
- facebook link validator (sharing debugger)
- https://pagespeed.web.dev/
- https://googlechrome.github.io/lighthouse/scorecalc/
Notes
- search for websites crawlers