Schema Builder Chrome extension
Free
Free Chrome extension; 40+ schema types
Checked 7 Oct 2026
Plans and prices
Schema.dev pricing
Schema Tester UI
Free
Free UI; optional API for larger-scale testing
Checked 7 Oct 2026
Free Chrome extension; 40+ schema types
Checked 7 Oct 2026
Free UI; optional API for larger-scale testing
Checked 7 Oct 2026