Contrast checker
Calculate text contrast and inspect component boundaries.
Use contrast checkerDeveloper tools
Combine automation with human testing.
Browser inspection can expose useful semantics, but it cannot guarantee what every assistive-technology combination will announce or how a person will experience the task.
Tools and workflows
Heading inspector
Review H1–H6 structure, labels, and skipped levels.
Inspect headingsAccessibility Tree Inspector
Inspect browser-exposed semantics and approximate what assistive technologies may receive.
Inspect semanticsPre-merge review
Use a repeatable checklist before approving interface changes.
Start PR reviewTesting matrix
Record tested, partial, untested, and known-issue combinations without overstating coverage.
View matrix