Klaviyo Email Design Best Practices: What Actually Converts
Most advice on email design is aesthetic advice: pick brand colors, add a hero image, make it look polished. None of that is wrong, but none of it is what actually moves someone from opening an email to clicking through it. The choices that do that work are structural, and they’re the ones most design conversations skip entirely.
The Two Things “Email Design” Usually Means
“Email design” gets used for two different jobs that don’t overlap as much as they seem to. One is aesthetic: does it look like the brand, does it feel polished, is it visually consistent with the rest of the site. The other is structural: does the layout get a reader to the point, and does it get them to click.
An email can score well on the first and fail completely on the second. A beautifully branded email with three competing calls-to-action and a wall of small text on mobile looks great in a design review and converts nobody. The aesthetic layer is what a brand notices first. The structural layer is what actually decides whether the email does its job.
Above-The-Fold CTA Placement
A single obvious next step beats three competing ones every time. When an email offers a “Shop Now” button, a “Learn More” link, and a secondary product callout all in the first screen, a reader’s attention splits across all three and often resolves into none of them.
Pick the one action that matters most for that specific send and put it above the fold, meaning visible on a phone screen before any scrolling happens. Everything else in the email should support that one action, not compete with it for the click.
Mobile-First Layout, Not A Shrunk Desktop Template
Most Klaviyo email opens happen on a phone, and a layout built for desktop first and then squeezed down for mobile shows it. Multi-column layouts collapse awkwardly, text sized for a monitor becomes hard to scan on a five-inch screen, and buttons sized for a mouse cursor become difficult to tap accurately.
Design single-column first. A reader should be able to scan the whole email in one downward pass without pinching to zoom or losing track of what section they’re in. If a layout only looks right at desktop width, it’s built backwards from how most subscribers will actually see it.
Image-To-Text Ratio And Alt Text
Every image in an email is a point of failure for readers on a slow connection, using an email client that blocks images by default, or simply not waiting for a slow-loading asset. When the message depends entirely on a picture, a blocked image doesn’t just look bad. It removes the message.
Alt text on every image that carries meaning gives a reader something even when the image itself doesn’t load. Decorative images can skip it, but a hero graphic containing your actual offer or headline needs alt text that says what the image says, not “image” or a blank tag.
This connects to why Gmail sometimes files an email into Promotions instead of Primary: a heavy image-to-text ratio is one of the formatting signals that pushes an email toward that classification in the first place. Getting the ratio right helps both problems at once, readability when images fail and inbox placement before the email is even opened.
Brand Consistency Without Over-Templating
Matching the rest of the brand doesn’t require using the same heavy, fully-designed template for every send. A welcome email can justify more visual investment because it’s setting a first impression. A routine weekly campaign doesn’t need the same header image, multiple content blocks, and full-width graphics every time.
Reserve the heaviest templates for the sends where the extra weight earns its place, and let more frequent, lighter sends carry brand consistency through tone, color, and typography instead of a repeated heavy structure.
The Actual Test
Before shipping a template, remove every image and read what’s left. If the email still makes its point and still gets the reader to a clear next step, the structure is doing its job independent of the visuals. If removing the images leaves a layout that no longer makes sense, the design was leaning on decoration to carry weight that the structure should be carrying instead.
That test is a better diagnostic than any style checklist, because it isolates the layer that actually drives clicks from the layer that just makes the email look finished.
If your current templates aren’t converting the way the open rate suggests they should, that’s usually a structural gap, not a visual one. Book a free audit and we’ll help you find where it’s actually happening.