Level AA · WCAG 2.1
1.4.10 Reflow
Content reflows into a single column at 320 CSS pixels wide without a horizontal scrollbar — the equivalent of 400% zoom on a desktop screen.
Partly automated Some failures are detectable, others need judgement.
How it fails in practice
A pricing table that forces the whole page sideways on a narrow screen. A fixed-width modal that pushes its own buttons off-screen.
How to fix it
Let layouts wrap. Where a data table genuinely needs width, scroll that table in its own region rather than the whole document.
At a glance
- Level
- Level AA — the level EN 301 549 requires, and therefore the level the BFSG and the EAA are measured against.
- Principle
- Perceivable
- Guideline
- 1.4 Distinguishable
- Added in
- WCAG 2.1
- EN 301 549
- 9.1.4.10
- Automated check
- Partly automated
Partly automated
How far an automated check gets
A tool finds some failures here and cannot see the rest. A clean automated result means the checks that exist found nothing — not that the criterion is met. This is the gap that makes a green scan look like an accessible site, and it is where our agents and a human reviewer do the remaining work.
We render every page at 360px and detect horizontal overflow. That catches the common failure; it does not catch every one, so a pass here is an automated pass rather than a conformance claim.
Related criteria
Other criteria under the same guideline.
Find out which criteria your site fails
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