visibility in Gmail
Not supported visibility is not supported in Gmail.
Works in 13 of 21 · not supported in 8
Which clients
- Works
- Outlook 365, Outlook (New), Outlook iOS, Outlook for Mac, Apple Mail, Apple Mail iOS, Yahoo Mail iOS, Samsung Mail, Thunderbird, HEY Mail, Proton Mail, Fastmail, Superhuman
- Not supported
- Gmail, Gmail Android, Gmail iOS, Outlook Classic, Outlook Android, Yahoo Mail, Yahoo Mail Android, AOL Mail
Your reader in Gmail sees the email without visibility, even if it looks right where you tested it.
The fix for Gmail
Use conditional comments or remove hidden content
<!-- For screen readers, use font-size: 0 trick -->
<div style="font-size: 0; max-height: 0; overflow: hidden;
mso-hide: all;" aria-hidden="true">
Preheader text
</div>Show the original
<div style="visibility: hidden;">
Hidden content for screen readers
</div>The checker needs a computer screen.
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What Gmail does with visibility
@emailens/engine 0.18.22 on the original code
Gmail does not support "visibility".
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advice
Questions
- How many email clients support visibility?
- It works in 13 of 21, not supported in 8.
- What do I use instead of visibility in Gmail?
- Use conditional comments or remove hidden content.
- Does visibility work in Gmail iOS?
- visibility is not supported in Gmail iOS. Closest to Gmail: Gmail iOS, which agrees on 251 of the 300 features both are tested on.
To see what else in your email Gmail does not support, paste the whole email.
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The checker needs a computer screen.
Real captures 14 Oct 2026 on 11 installs · 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 · the Gmail capture is not counted (it skips Gmail's sanitiser)