Design60–70% of opens occur on mobile devices. If your email breaks on small screens, you lose most of your audience.
Mobile-First Statistics
60–70% of opens occur on mobile devices. If your email breaks on small screens, you lose most of your audience.
Single-column layouts with 16px+ body text are baseline requirements.
Layout and CTA Placement
Stack images and copy vertically. Buttons should be at least 44px tall with ample padding.
Put the primary CTA above the fold on mobile preview.
Dark Mode and Accessibility
Test logos and images on dark backgrounds — use transparent PNGs where needed. Alt text helps screen readers and when images block.
Sufficient color contrast improves readability and compliance.
Frequently Asked Questions
What email width works best?
600px max width is standard; fluid hybrids scale down on small screens.
Do GIFs hurt mobile load time?
Optimize file size; heavy GIFs slow load and can frustrate readers on slow networks.
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