All checks

440 procedures, grouped by the part of the stack they test. Each page gives the shortest working check first, then the steps, the real output and what a failure means.

Security headers and TLS

Performance and delivery

API checks

Authentication and sessions

Accessibility

Frontend and browser checks

Crawlability and indexing

Email and DNS

CI and test suite quality

Localization and formats

Payments and webhooks

WebSockets and realtime

Logging and observability

Databases and migrations

Load and stress checks

Test environments and doubles

File uploads and media

Background jobs and queues

Forms and input validation

Data export and import