visibility in Outlook 365
Works visibility works in Outlook 365.
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 →
What Outlook 365 does with visibility
The Emailens probe for visibility on a real install counted as Outlook 365, captured 14 Oct 2026. It shows the probe, not the fix. Where visibility is supported it shows: a, gap, b (no hidden word).
caniemail: visibility works in Outlook 365.
This Outlook.com install drops the <style> in the head, so only inline styles apply.
Your next question
- Does animation work in Outlook 365?
Works in 5 of 21 · partial in 1 · not supported in 15
fix - Does transform work in Outlook 365?
Works in 7 of 21 · partial in 1 · not supported in 13
fix - Does overflow-wrap work in Outlook 365?
Works in 2 of 21 · partial in 3 · not supported in 13 · 3 untested
fix - Does bimi work in Outlook 365?
Works in 9 of 21 · not supported in 11 · 1 untested
- Does clip-path work in Outlook 365?
Works in 8 of 21 · not supported in 13
- Does block-size work in Outlook 365?
Works in 7 of 21 · not supported in 13 · 1 untested
Questions
- How many email clients support visibility?
- It works in 13 of 21, not supported in 8.
- Does visibility work in Outlook (New)?
- visibility works in Outlook (New). Outlook 365 and Outlook (New) differ on 1 feature: text-shadow.
To see what in your email Outlook 365 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