Resize Text
Except for captions and images of text, text can be resized without assistive technology up to 200 percent without loss of content or functionality.
In plain language
People need to be able to zoom text up to 200% (double the size) without anything breaking, getting cut off, or becoming impossible to use.
Why it matters
People with low vision rely on zooming to read comfortably. If the page breaks — text gets clipped, buttons overlap, content disappears — zooming becomes useless, and they're stuck unable to read the site.
In practice
Fails this criterion
Zooming the page to 200% causes a heading to overflow its box, cutting off the bottom half of the letters so it's unreadable.
Meets this criterion
The same page uses flexible, resizable layouts, so at 200% zoom everything reflows cleanly — text wraps, boxes grow, nothing is cut off or overlapping.
Test it yourself
Use your browser's zoom feature (Ctrl/Cmd + +) to zoom the page to 200%. Check whether all text and controls are still fully visible and usable, with nothing clipped, overlapping, or missing.