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How to Fix CSS Grid Broken Columns in Outlook 2016
for Klaviyo Campaigns

A programmatic integration guide for resolving email rendering crashes inside Outlook 2016 using Klaviyo's layout editor environment.

Root Bug Analysis

CSS Grid is completely unsupported in Outlook desktop clients, causing adjacent columns to overlap or stack.

Active rendering engine: Microsoft Word (MSO)

Klaviyo Specific Guide

Klaviyo's default grid layouts are translated to MSO tables, but custom inline grid wrappers collapse without explicit widths.

Integration Step:

Open your Klaviyo template editor. Drag an 'HTML' block directly into your layout timeline (do not use a standard text box). Clear the default skeleton content inside the Klaviyo markup editor and paste the RenderOps corrected inline code.

ESP Unsubscribe Alignment

When compiling custom HTML templates for Klaviyo, you must ensure your layout retains deliverability compliance loops. Klaviyo requires you to insert their specific unsubscribe merge tag, otherwise your campaign delivery will be flagged by automated spam audits.

Klaviyo Unsubscribe Tag:{% unsubscribe %}

Documented Client Behavior

Expected layout behavior based on target rendering engine specifications:

Documented behavior: CSS Grid is ignored, stacking columns vertically on Outlook 2016 desktop. Fixed by mapping custom grid elements to percentage-width tables.

Interactive Klaviyo Custom Sandbox

Target Environment: Outlook 2016

Paste Your Broken Code

<div style="display: grid; grid-template-columns: 1fr 1fr; gap: 10px;">
  <div>Col 1</div>
  <div>Col 2</div>
</div>

RenderOps Compiled Output

<!-- Paste code on the left and click compile to output clean fallback tags -->

Auto-compile fixes inside RenderOps Workspace

Load layout code directly into our Flexbox→Table Compiler to compile responsive table frameworks that display cleanly in Outlook 2016.

Launch Flexbox→Table Compiler

How to Fix CSS Grid Broken Columns in Outlook 2016 for Klaviyo Campaigns