Accessibility statement
A website about accessibility must be accessible itself. Here we say honestly what we have achieved, how we test and what is still missing.
Our goal
This website aims to meet all WCAG 2.2 rules at Levels A and AA – and as many Level AAA rules as possible.
How we test
Every change triggers an automated test of all pages. The change is only published if there is not a single finding.
- axe-core with all rules for WCAG A, AA and AAA plus best practices
- HTML validation with html-validate
- Light and dark theme, desktop, tablet, phone in portrait and landscape, and 320 pixels width (equal to 400% zoom)
- Keyboard: every control must be reachable with Tab, have a visible focus and must not be covered
- Size of all click targets: at least 44 × 44 pixels
- Text spacing as in WCAG 1.4.12: nothing may be cut off
- All colours: text at least 7:1 contrast, borders and focus at least 3:1
What automated tests cannot do
To be honestAutomated tools find only part of all barriers. Nobody can therefore honestly promise “100% accessible”. This website has not yet been tested by disabled people or audited by an independent body.
Known limitations
- Videos do not yet have sign language interpretation (WCAG 1.2.6, Level AAA). There are captions and full transcripts.
- Podcast and videos use a computer-generated voice. It pronounces some technical terms imprecisely.
- The texts are written in plain language but not in certified Easy Read (WCAG 3.1.5, Level AAA).
- Search, checker, filters and demos need JavaScript. All rules, transcripts and explanations can be read without JavaScript.
- Some demos show barriers on purpose, for example a button that cannot be reached by keyboard. They are labelled as barriers and the accessible solution is always next to them.
- Links to the W3C lead to pages in English.
Found a barrier?
Please tell us. Every report helps – even a short one. Say which page the problem is on and which device or assistive technology you use.
Report a barrier on GitHub (external site)
Technology
- HTML, CSS and a little JavaScript, with no fonts or scripts from third-party servers
- No cookies, no tracking
- The site respects your settings for dark theme, reduced motion and high contrast
This statement was last updated on 11 November 2026