All WCAG criteria
WCAG 1.4.4 · PerceivableLevel AA

1.4.4Resize Text

Text must be resizable up to 200% without loss of content or functionality (no horizontal scroll, no content cut off).

Common failures

Patterns that fail this criterion.

  • 01Fixed-pixel font sizes that break the layout when zoomed
  • 02Containers with `overflow: hidden` that hide content when text grows
  • 03Navigation that overflows the viewport when text is enlarged
How to test

Testing approach: manual.

Manual — set browser zoom to 200%; confirm no content is cut off, no horizontal scroll appears on the main content.

How to fix

Remediation steps.

  1. 1

    Use relative units

    `rem`, `em`, `%` instead of `px` for text and most spacing. Browsers scale these with user preference.

  2. 2

    Test at 200% zoom

    Include 200% zoom in your responsive test matrix.

  3. 3

    Allow containers to grow

    Avoid fixed heights on text containers; let content reflow.

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Related criteria

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WCAG 1.4.10 · Level AA

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All 50 WCAG 2.1 Level A + AA success criteria explained.

View the full checklist