Rendering Fixes in IronPdf.UpdatedChrome

Updated:June 28, 2026

Some HTML and CSS features render incorrectly under the standard IronPdf package because it ships an older Chromium engine. The IronPdf.UpdatedChrome package carries a newer engine that fixes several of these cases by design.

The standard IronPdf package bundles CEF engine version 109 for compatibility with older Windows Servers. IronPdf.UpdatedChrome bundles CEF engine version 131, giving more reliable pixel-perfect output than Chrome browser print preview. If your output looks wrong only on modern CSS, the engine version is the likely cause.

Solution

Switch the dependency to IronPdf.UpdatedChrome and re-render. The cases below are resolved by the newer engine with no code changes.

1. CSS `overflow: hidden`

Content clipped by overflow: hidden renders as expected under the updated engine, where the standard package fails to honor the rule.

overflow:hidden not honored in standard IronPdf, content bleeds past page edge

overflow:hidden correctly clipped under IronPdf.UpdatedChrome

2. Custom Line Height and Paper Size

A layout using line-height: 129% on a custom 6 x 9 inch paper size places text correctly under IronPdf.UpdatedChrome. Text position is adjusted to match the intended design.

text clipped at page break under standard IronPdf with custom line-height

text positioned correctly with no clipping under IronPdf.UpdatedChrome

3. Grid Layout with `subgrid`

<div style="display: grid; grid-template-columns: 1fr 1fr 1fr">
<div style="display:grid; grid-template-columns: subgrid; grid-column: 1/4">

<div style="display: grid; grid-template-columns: 1fr 1fr 1fr">
<div style="display:grid; grid-template-columns: subgrid; grid-column: 1/4">

HTML

The updated engine resolves the inner grid to subgrid as expected. The older engine in the standard package does not support this layout correctly.

subgrid layout broken under standard IronPdf, score boxes stacked vertically

subgrid layout rendered correctly in aligned columns under IronPdf.UpdatedChrome

Please noteIronPdf.UpdatedChrome uses CEF 131. Stay on the standard IronPdf package only if you must target older Windows Servers that need CEF 109.

Curtis Chau

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Technical Writer

Curtis Chau holds a Bachelor’s degree in Computer Science (Carleton University) and specializes in front-end development with expertise in Node.js, TypeScript, JavaScript, and React. Passionate about crafting intuitive and aesthetically pleasing user interfaces, Curtis enjoys working with modern frameworks and creating well-structured, visually appealing manuals.

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