Does ReflowPDF support the CSS property overflow-clip-margin?

2 of 2 examples match Chrome. pixel-exact: Our rendering of the example is identical to Chrome's, pixel for pixel — no further apart than the example's own noise floor. Measured against Chrome on 2 examples; the renders and the difference maps are published at https://reflowpdf.com/conformance/css/overflow-clip-margin.

Dataset 20261011-0550-f160c57 · measured 2026-10-11 05:50 UTC

overflow-clip-margin

✓pixel-exact2 of 2 examples match Chromecss-overflow-4

Our rendering of the example is identical to Chrome's, pixel for pixel — no further apart than the example's own noise floor.

What the specification says

Initial value: 0px
Applies to: boxes to which overflow applies
Inherited: no
Percentages: see individual properties
Computed value: see individual properties
Syntax: <visual-box> || <length>

css-overflow-4 definition

The measurements

2 examples, 2 of them matching Chrome. Each is one declaration on a small page, drawn by Chrome and by our engine. Drag the handle to wipe between them.

overflow-clip-margin:20px✓pixel-exact

Chrome of this test — Left of the line is our rendering; right of it is the chrome. Drag, or focus the slider and use the arrow keys.

Our render of this test — Left of the line is our rendering; right of it is the chrome. Drag, or focus the slider and use the arrow keys.

Identical to Chrome: nothing differs, so there is no difference map to show.

Differing pixels: 0
Max channel delta: 0

the example page

overflow-clip-margin:4px✓pixel-exact

Identical to Chrome: nothing differs, so there is no difference map to show.

Differing pixels: 0
Max channel delta: 0

the example page

Which values were measured

“Supported” on one example means “supported at the value we tried”. The property’s declared grammar has 4 branches; 1 of them carry a measurement. The publishing ceiling is 12 examples per property — a branch past it is left out by our choice, not by accident.

Value	Measured
content-box	not measured
padding-box	not measured
border-box	not measured
20px	✓pixel-exact

Tests in the suite that name this property

Secondary evidence: 26 Web Platform Tests carry a spec anchor pointing at this property. Only 1,254 tests in the whole corpus carry such an anchor, so an empty list here means nothing at all.

+ 14 more

Measured against Chrome 148.0.7778.96 on 2026-10-11, with up to 40 candidate values tried per property. All properties · How the measurement works

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Value

Measured

content-box

not measured

padding-box

not measured

border-box

not measured

20px

✓pixel-exact