visibility in Superhuman
Works visibility works in Superhuman.
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
The fix for the clients that need it
Needed in 8 of 21: Gmail, Gmail Android, Gmail iOS and 5 more.
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>A free account opens all 21 clients and keeps your checks for 7 days. Create a free account →
Your next question
- Does resize work in Superhuman?
Works in 1 of 21 · partial in 1 · not supported in 16 · 3 untested
- Does <form> work in Superhuman?
Works in 10 of 21 · partial in 4 · not supported in 7
fix - Does <link> work in Superhuman?
Works in 3 of 21 · not supported in 18
fix - Does <video> work in Superhuman?
Works in 3 of 21 · partial in 2 · not supported in 16
fix - Does @import work in Superhuman?
Works in 4 of 21 · not supported in 17
- Does <audio> work in Superhuman?
Works in 4 of 21 · not supported in 17
Questions
- How many email clients support visibility?
- It works in 13 of 21, not supported in 8.
To see what in your email Superhuman does not support, paste the whole email.
No signup · Five clients free, Outlook Classic included · All 21 with an account
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