Download TheWCAG
The free desktop accessibility toolkit. Pick a color pair from anywhere on screen, get the exact WCAG contrast ratio, simulate color blindness, and turn annotated screenshots into shareable reports - natively on your Mac or PC.
Downloads always resolve to the latest release. You can also browse every version on GitHub Releases.
What you get
On-screen contrast picker
Sample any two pixels and read the WCAG 2.1/2.2 ratio, AA/AAA verdict, and APCA Lc instantly.
Color-blindness lens
See any app through protanopia, deuteranopia, tritanopia, and low-acuity filters, live.
Annotate & measure
Capture a region, flag issues against WCAG success criteria, and check 24px target sizes.
Shareable reports
Publish an annotated screenshot to a link your team can open - no account needed to view.
New to contrast requirements? Read the WCAG contrast guide or try the color contrast checker.