HTML element · data last changed 10 Nov 2026
<object> in email clients
Works in 1 of 21. Not supported in Gmail, Gmail Android, Gmail iOS and 13 more. Partial in Apple Mail, Samsung Mail and Thunderbird. Untested in Superhuman.
Your reader in Outlook Classic sees the email without <object>, even if it looks right where you tested it.
caniemail (MIT) via @emailens/engine 0.18.22
What to do instead in Outlook Classic
There is no drop-in fix for <object> in Outlook Classic. Design so the email still reads without it.
No signup · Five clients free, Outlook Classic included · All 21 with an account
The checker needs a computer screen.
A free account opens all 21 clients and keeps your checks for 7 days. Create a free account →
Every account includes one free real-device check in classic Outlook, Outlook for Mac and Apple Mail, after you verify your email and run one preview, while this month's free capacity lasts. How real-device checks work →
<object> is not among the 24 features we have screenshotted on real installs. The ones we have →
All 21 clients, problems first
| Client | Support |
|---|---|
| Gmail | Not supported |
| Gmail Android | Not supported |
| Gmail iOS | Not supported |
| Outlook 365 | Not supported |
| Outlook (New) | Not supported |
| Outlook Classic | Not supported |
| Outlook iOS | Not supported |
| Outlook Android | Not supported |
| Outlook for Mac | Not supported |
| Yahoo Mail | Not supported |
| Yahoo Mail Android | Not supported |
| Yahoo Mail iOS | Not supported |
| HEY Mail | Not supported |
| Proton Mail | Not supported |
| AOL Mail | Not supported |
| Fastmail | Not supported See caveat 3 |
| Apple Mail | Partial See caveat 1 |
| Samsung Mail | Partial See caveat 2 |
| Thunderbird | Partial See caveat 2 |
| Superhuman | Untested |
| Apple Mail iOS | Works |
Caveats (3)
- 1. Apple Mail: Partial support. Does not support Videos resources.
- 2. Samsung Mail, Thunderbird: Partial support. Does not support PDF resources.
- 3. Fastmail: Not supported. The
<object>element and all its content is removed.
Caveats as recorded by caniemail (MIT), one entry per wording.
Your next question
- Does <form> work in Outlook Classic?
Works in 10 of 21 · partial in 4 · not supported in 7
fix - Does <svg> work in Outlook Classic?
Works in 5 of 21 · partial in 1 · not supported in 15
fix - Does <video> work in Outlook Classic?
Works in 3 of 21 · partial in 2 · not supported in 16
fix - Does <input type="checkbox"> work in Outlook Classic?
Works in 16 of 21 · partial in 1 · not supported in 3 · 1 untested
- Does <input type="hidden"> work in Outlook Classic?
Works in 16 of 21 · partial in 1 · not supported in 3 · 1 untested
- Does <input type="radio"> work in Outlook Classic?
Works in 16 of 21 · partial in 1 · not supported in 3 · 1 untested
Every feature in Outlook Classic · All email CSS features · What real installs show
Paste your email
Get new email CSS fixes by email.