CSS property · 10 real installs 14 Oct 2026 · data last changed 10 Nov 2026
object-fit in email clients
Works in 14 of 21. Not supported in Outlook Classic, Yahoo Mail, Yahoo Mail Android and 2 more. Partial in Gmail Android and Gmail iOS.
Your reader in Outlook Classic sees the email without object-fit, even if it looks right where you tested it.
caniemail (MIT) via @emailens/engine 0.18.22
What to do instead in Outlook Classic
Use width/height attributes instead of object-fit
<!-- Crop/resize image server-side to exact dimensions -->
<img src="photo-300x200.jpg" width="300" height="200"
alt="Photo" style="display: block; border: 0;" />Show the original
<img src="photo.jpg" style="width: 300px; height: 200px;
object-fit: cover;" />No signup · Five clients free, Outlook Classic included · All 21 with an account
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object-fit on 10 real installs
One Emailens probe, screenshotted on each install on 14 October 2026, next to our live preview of the same client. Where object-fit is supported you should see: image cropped, not squashed.
caniemail: object-fit is not supported in Outlook Classic.
caniemail: object-fit is not supported in Yahoo Mail.
caniemail: object-fit works in Outlook 365.
This Outlook.com install drops the <style> in the head, so only inline styles apply.
caniemail: object-fit works in Apple Mail.
caniemail: object-fit works in Apple Mail iOS.
Also captured, not counted as evidence (3)
- Outlook for Microsoft 365 · not mapped to an engine client yet Real screenshot
- Outlook 2019 for Mac (legacy app) · not counted as Outlook for Mac Real screenshot
This is the legacy Outlook for Mac app. The new Outlook for Mac, which the table describes, drops gradients, grid sizing functions, var() and more.
- Gmail (web) · not counted as Gmail Real screenshot
This Gmail install does not apply Gmail's sanitiser, so it shows more than real Gmail does.
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 →
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 |
| AOL Mail | Not supported |
| Gmail Android | Partial See caveat 1 |
| Gmail iOS | Partial See caveat 1 |
Works in 14: Gmail, Outlook 365, Outlook (New) and 11 more. Show all
| Client | Support |
|---|---|
| Gmail | 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 |
| Thunderbird | Works |
| HEY Mail | Works |
| Proton Mail | Works |
| Fastmail | Works |
| Superhuman | Works |
Caveats (1)
- 1. Gmail Android, Gmail iOS: Partial. Not supported with non Google accounts.
Caveats as recorded by caniemail (MIT), one entry per wording.
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fix
object-fit in Outlook Classic · Every feature in Outlook Classic · All email CSS features · What real installs show
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