Level AASince WCAG 2.0
1.4.4 Resize Text
Guideline 1.4: Distinguishable – Content is easy to see and hear: contrast, size, spacing.
What does the rule require?
Text can be enlarged to 200% without losing content or functionality.
How to get it right
Use relative units (rem, em, %) and do not block zooming: no user-scalable=no in the viewport meta tag.
Who benefits most?
- People with low vision
Official wording
This page explains the rule in simple words. Only the original W3C text is normative.
- “Understanding Resize Text” at W3C (external site)
- Techniques in the WCAG Quick Reference (external site)