diagnostic · one of 29free, no counter
Reflow
Does this survive 320px and 200% zoom?
WCAG 1.4.10 asks that content reflow to 320 CSS pixels without a second scrollbar, and 1.4.4 that text scale to 200% without loss. Both are routinely claimed and rarely checked, because checking means resizing by hand and remembering what you saw.
Reach itPress ⌘+K on any tab and type reflow.Ctrl+Kon Windows and Linux
TWO BUILDS9 browsers
Chromelisting in reviewFirefoxlisting in reviewBravelisting in reviewOperalisting in reviewEdgelisting in review4 moreChromium browsers: Arc, Vivaldi, Chromium, Opera GXthe Chrome buildin the panel · free, no counter
What this actually is
what breaks at 320px and 200% zoomBefore signing off an accessibility claim, and before an audit does it for you. It pairs with the conformance statement, which records the result rather than the impression.
What the two criteria actually require
quoted, not paraphrased- 1.4.10 Reflow
- no loss of content or function, and no scrolling in two directions, at 320 CSS pixels
- 1.4.4 Resize text
- text to 200% with no loss of content or function, without assistive technology
- the exception
- parts of the content genuinely requiring two dimensions: maps, diagrams, data tables
Asked about this diagnostic
3 of themIs 320 pixels a real phone?
It is 1280 CSS pixels at 400% zoom, which is where the number comes from. It also happens to match the narrowest phones still in use, so it is both the standard and a real reading.
A data table fails. Is that a real failure?
Probably not - the criterion exempts content that genuinely needs two dimensions, and a table is the example the specification gives. The row is still reported, because the judgement is yours and a silent exemption is how a real failure gets exempted too.
Does it replace an audit?
No. It replaces the resizing-and-remembering part of one. It reads two criteria of dozens, and a conformance statement built on it says exactly which two were measured.
TWO BUILDS9 browsers
Chromelisting in reviewFirefoxlisting in reviewBravelisting in reviewOperalisting in reviewEdgelisting in review4 moreChromium browsers: Arc, Vivaldi, Chromium, Opera GXthe Chrome build63 of these · no host permissions · three free audits