object-fit in Fastmail
Works object-fit works in Fastmail.
Works in 14 of 21 · partial in 2 · not supported in 5
Which clients
- Works
- Gmail, Outlook 365, Outlook (New), Outlook iOS, Outlook Android, Outlook for Mac, Apple Mail, Apple Mail iOS, Samsung Mail, Thunderbird, HEY Mail, Proton Mail, Fastmail, Superhuman
- Partial
- Gmail Android, Gmail iOS
- Not supported
- Outlook Classic, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, AOL Mail
The fix for the clients that need it
Needed in 7 of 21: Outlook Classic, Yahoo Mail, Yahoo Mail Android and 4 more.
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;" />A free account opens all 21 clients and keeps your checks for 7 days. Create a free account →
Your next question
- Does unit-vw work in Fastmail?
Works in 18 of 21 · not supported in 2 · 1 untested
- Does unit-vh work in Fastmail?
Works in 17 of 21 · partial in 1 · not supported in 2 · 1 untested
- Does mix-blend-mode work in Fastmail?
Works in 13 of 21 · partial in 2 · not supported in 6
- Does writing-mode work in Fastmail?
Works in 13 of 21 · partial in 2 · not supported in 6
- Does filter work in Fastmail?
Works in 7 of 21 · not supported in 14
- Does grid-template-columns work in Fastmail?
Works in 7 of 21 · partial in 1 · not supported in 13
Questions
- How many email clients support object-fit?
- It works in 14 of 21, partial in 2, not supported in 5.
- Does object-fit work in Apple Mail?
- object-fit works in Apple Mail. Closest to Fastmail: Apple Mail, which agrees on 192 of the 235 features both are tested on.
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Real captures 14 Oct 2026 on 10 installs · caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 15 Jul 2021 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping