What WCAG 1.4.10 Requires
Content must reflow to a single column and remain fully usable at a 320px-wide viewport (equivalent to 400% zoom on a standard desktop) without needing to scroll in two directions.
Can AccessBell Test This Automatically?
Not fully. Like most WCAG criteria that depend on meaning or context, this one needs a person to judge. AccessBell's report lists it for manual review rather than marking it pass or fail automatically, so it never gets missed.
How to Test It by Hand
Resize the browser to 320px wide, or zoom to 400%, and confirm nothing requires horizontal scrolling and all content and functionality remain available.
Common Failures
- A fixed-width table or layout element forces horizontal scrolling of the entire page at narrow widths.
- A sidebar and main content sit side by side with no responsive stacking.
Related Criteria in Distinguishable
WCAG 1.4.10 Questions
What does WCAG 1.4.10 require?
Content must reflow to a single column and remain fully usable at a 320px-wide viewport (equivalent to 400% zoom on a standard desktop) without needing to scroll in two directions.
Can AccessBell test WCAG 1.4.10 automatically?
Not fully. This criterion needs a person to judge, so AccessBell's report lists it for manual review rather than marking it pass or fail on its own.
What level is WCAG 1.4.10?
Level AA, added in WCAG 2.1. Level AA is required to meet WCAG AA, the level referenced by the ADA, Section 508 and most accessibility laws.
Sources
- W3C: Understanding 1.4.10 Reflow (opens in a new tab)
- W3C: Web Content Accessibility Guidelines (WCAG) 2.2 (opens in a new tab)
This page explains a technical standard and is not legal advice. See our disclaimer.