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Typography accessibility checker.
Twelve checks across text size, line height, line length and the things that quietly break WCAG Text Spacing — the criterion almost nobody tests.
What breaks text spacing, and why it matters
WCAG 1.4.12 requires that your content still works when a reader overrides line height, paragraph spacing, letter spacing and word spacing with their own stylesheet. What usually breaks it is not the typography at all — it is a fixed height, a hidden overflow, or an !important that stops the override applying. Those are what we look for. We read the CSS in the page itself; styles in external files are a separate request and are not covered.
Try an article or documentation page — that is where line length and spacing problems actually cost you readers.
This reads declared CSS. It cannot see external stylesheets, computed values after the cascade, or how the page actually renders — so a clean result narrows the search rather than ending it. The manual list below is the real test.
Find out what's broken.
Then actually fix it.
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