Zoom disabled by meta viewport Accessibility Checkpoint


Do not use the meta viewport tag to disable zoom.


Setting user-scalable=no or maximum-scale to less than 2.0 prevents zooming small text to make it readable. Note that iOS 10+ ignores this setting.

Applicable standards

Note: Section 508 Refresh (2017) checkpoints are equivalent to WCAG 2.0 level A and level AA checkpoints.

Change history

  • 6.51 Dec 2023 Updated to match ACT Rule PR 1994.
  • 5.37 May 2020 Negative values for maximum-scale are ignored.
  • 5.36 Jan 2020 Added.

This page describes a web site issue detected in HTML documents by SortSite Desktop and OnDemand Suite.

Rule ID: AccHtmlMetaViewportNoZoom