Does ReflowPDF support the CSS property column-rule-width?

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 1 example; the renders and the difference maps are published at https://reflowpdf.com/conformance/css/column-rule-width.

Dataset 20260827-2142-2f1b575 · measured 2026-08-27 21:42 UTC

column-rule-width

✓pixel-exactcss-gaps-1

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: medium
Applies to: grid containers, flex containers, multicol containers, and grid lanes containers
Inherited: no
Percentages: n/a
Computed value: list of absolute lengths, snapped as a border width
Syntax: <line-width-list> | <auto-line-width-list>

css-gaps-1 definition

The measurements

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

column-rule-width:12px✓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.

1,663 pixels differ from Chrome, the largest by 238 of 255 on one channel.

Differing pixels: 1,663
Max channel delta: 238

the example page

Which values were measured

“Supported” on one example means “supported at the value we tried”. The property’s declared grammar has 1 branch; 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
12px	✓pixel-exact

Measured against Chrome 148.0.7778.96 on 2026-08-27, with up to 40 candidate values tried per property. All properties · How the measurement works

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