How many email clients support transform?

It works in 7 of 21, partial in 1, not supported in 13.

transform in Superhuman

Partial transform is partly supported in Superhuman.

Works in 7 of 21 · partial in 1 · not supported in 13

Which clients

Works: Apple Mail, Apple Mail iOS, Samsung Mail, Thunderbird, HEY Mail, Proton Mail, Fastmail
Partial: Superhuman
Not supported: Gmail, Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook Classic, Outlook iOS, Outlook Android, Outlook for Mac, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, AOL Mail

Your reader in Superhuman may not see transform the way you wrote it, even if it looks right where you tested it.

What to do instead in Superhuman

Pre-render transformed states as images or use table layout

instead

4 lines

<!-- Pre-render rotated content as an image -->
<img src="rotated-content.png" width="200" height="200"
  alt="Rotated content"
  style="display: block; border: 0;" />

Show the original

before

3 lines

<div style="transform: rotate(45deg);">
  Rotated content
</div>

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Your next question

Every feature in Superhuman · transform in every client

Questions

How many email clients support transform?: It works in 7 of 21, partial in 1, not supported in 13.
What do I use instead of transform in Superhuman?: Pre-render transformed states as images or use table layout.

To see what else in your email Superhuman does not support, paste the whole email.

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caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 28 Feb 2019 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping