How to Preview Your HTML Email in Gmail
Gmail is the world's most popular email client, but it strips and rewrites parts of your HTML. If you're not previewing before you send, your subscribers might see broken layouts, missing styles, or clipped content. Learn more in our ultimate guide to HTML email testing.
Why Gmail Rendering Matters
Gmail handles HTML email differently depending on the platform. Gmail on Chrome renders differently from Gmail on iOS or Android. Each variant strips certain CSS properties, rewrites class names, and applies its own quirks. For a complete breakdown of how Gmail differs from other clients, see our comparison of Gmail vs Outlook rendering.
For example, Gmail on desktop strips <style> blocks in some contexts, forces its own font stack, and clips emails over 102 KB. On mobile, the viewport is narrower and touch targets need to be larger. Our guide on email width best practices covers sizing for mobile.
If your email HTML exceeds ~102 KB, Gmail will clip the content and show a "[Message clipped]" link. Always check your email size.
How to Preview Gmail Email Without Sending
Traditionally, developers send test emails to their own Gmail account. This is slow, unreliable, and doesn't let you easily compare across Gmail variants (Chrome vs iOS vs Android). Many developers use our email preview tool instead for instant testing.
With MailViewr's email preview tool, you can paste your HTML code (or build it in the drag-and-drop editor) and instantly preview how Gmail will render it — across 5 Gmail variants:
- Gmail on Chrome — Desktop web app
- Gmail on Firefox — Slightly different CSS handling
- Gmail on Safari — macOS web rendering
- Gmail on iOS — iPhone/iPad native app
- Gmail on Android — Android native app
Common Gmail Rendering Issues
These are the most frequent problems developers encounter when sending HTML emails to Gmail:
Common Problems
- Custom fonts falling back to Arial
- Margin collapsing or behaving unexpectedly
- Dark mode inverting brand colors
- Emails clipped at 102 KB
- CSS Grid and some flexbox properties not supported
How to Fix
- Declare fallback font stacks
- Use table-based layouts for consistent spacing
- Use inline CSS for all critical styles
- Test with MailViewr's dark mode toggle
- Keep HTML under 100 KB
Can I Send a Test Email to Gmail from MailViewr?
Yes! After previewing your email, you can send it directly to your Gmail inbox with one click. Sign up for a free account, add your Gmail address as a verified recipient, and hit Send. You'll see exactly how Gmail renders your email in a real inbox — not just a simulation.
Does MailViewr Check Gmail Compatibility?
MailViewr's built-in compatibility checker scans your HTML and CSS against Gmail's known limitations. It flags unsupported properties, gives you a compatibility score, and shows actionable suggestions — so you can fix issues before sending.
Preview Your Gmail Email Now
Try It Free
Paste your HTML, pick Gmail, and see the result instantly. No signup needed to preview.
Preview in Gmail →