CSS property · data last changed 10 Nov 2026
[aria-hidden] in email clients
Works in 13 of 21. Not supported in Outlook Classic, Yahoo Mail, Yahoo Mail Android and 4 more. Untested in Superhuman.
Safe to leave in: where it is not supported, the email renders the same.
caniemail (MIT) via @emailens/engine 0.18.22
What to do instead in Outlook Classic
There is no drop-in fix for [aria-hidden] in Outlook Classic. Design so the email still reads without it.
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[aria-hidden] is not among the 24 features we have screenshotted on real installs. The ones we have →
All 21 clients, problems first
| Client | Support |
|---|---|
| Outlook Classic | Not supported |
| Yahoo Mail | Not supported |
| Yahoo Mail Android | Not supported |
| Yahoo Mail iOS | Not supported |
| Thunderbird | Not supported |
| HEY Mail | Not supported |
| AOL Mail | Not supported |
| Superhuman | Untested |
Works in 13: Gmail, Gmail Android, Gmail iOS and 10 more. Show all
| Client | Support |
|---|---|
| Gmail | Works |
| Gmail Android | Works |
| Gmail iOS | Works |
| Outlook 365 | Works |
| Outlook (New) | Works |
| Outlook iOS | Works |
| Outlook Android | Works |
| Outlook for Mac | Works |
| Apple Mail | Works |
| Apple Mail iOS | Works |
| Samsung Mail | Works |
| Proton Mail | Works |
| Fastmail | Works |
Your next question
- Does [background] work in Outlook Classic?
Works in 16 of 21 · partial in 2 · not supported in 2 · 1 untested
- Does [role] work in Outlook Classic?
Works in 14 of 21 · partial in 4 · not supported in 2 · 1 untested
- Does [aria-label] work in Outlook Classic?
Works in 13 of 21 · not supported in 7 · 1 untested
- Does [aria-describedby] work in Outlook Classic?
Works in 9 of 21 · not supported in 11 · 1 untested
- Does [aria-live] work in Outlook Classic?
Works in 8 of 21 · not supported in 12 · 1 untested
- Does [aria-labelledby] work in Outlook Classic?
Works in 7 of 21 · not supported in 13 · 1 untested
Every feature in Outlook Classic · All email CSS features · What real installs show
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