Our target
WCAG 2.2 at level AA, plus the bar AGENCY sets for itself: every standalone control is at least 96 pixels tall with at least 24 pixels between controls, nothing has a time limit, and nothing moves under your gaze.
What we did
- Large, well-spaced buttons and links, with a thick, high-contrast focus outline.
- A “Skip to content” link, a logical heading order, and landmarks for the header, navigation and footer.
- A large “Next” link at the end of each section, so you can move through the page in steps instead of scrolling.
- Body text in Atkinson Hyperlegible, a typeface designed by the Braille Institute for low-vision readers, at a large base size; headings use your computer's own rounded system font where it has one. The site's own copy of the font is used; nothing is loaded from another company.
- Bright colours that never carry meaning on their own. Every text colour is checked for contrast against its background, in light and dark, and follows your computer's setting or your choice.
- Motion is short, gentle and plays once; nothing loops. It's turned off completely if you've asked your computer to reduce motion.
- Everything works without JavaScript except finding the newest download, which falls back to a link.
- The page works at 400% zoom and on phone screens without scrolling sideways.
- Screenshots and photos have text descriptions. The demo video has captions and never plays by itself.
- Plain language, one idea at a time.
How it's tested
Every change to the site runs these checks automatically before it's published:
- axe (an automated accessibility checker) on every page, in light and dark, on desktop and phone sizes, with no violations allowed.
- Keyboard tests: every control can be reached with Tab, the focus is always visible, and the download and questions work with the keyboard alone.
- Size tests: every standalone control is at least 96 pixels tall with 24 pixels of space.
- Lighthouse: an accessibility score of 100 is required on every page.
- A link checker, so no link leads nowhere.
Automated tools find many problems but not all of them. The site hasn't yet been tested by people using eye gaze, switches or screen readers day to day. That testing matters most, and we'd welcome it.
Known limitations
- Links inside paragraphs are ordinary text size, as WCAG allows; every one is repeated or reachable as a large control nearby.
- The download panel needs JavaScript to find the newest version. Without it, the panel shows a large link to the releases page on GitHub. GitHub's own pages are not under our control.
Tell us about a problem
If anything on this site is hard to use, please tell us, and say how you were browsing if you're happy to share. We treat accessibility problems as bugs.
This statement was last reviewed on 12 October 2026. The site's source code is on GitHub.