animation in Thunderbird
Not supported animation is not supported in Thunderbird.
Works in 5 of 21 · partial in 1 · not supported in 15
Which clients
- Works
- Apple Mail, Apple Mail iOS, Samsung Mail, HEY Mail, Fastmail
- Partial
- Superhuman
- Not supported
- Gmail, Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook Classic, Outlook iOS, Outlook Android, Outlook for Mac, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, Thunderbird, Proton Mail, AOL Mail
Your reader in Thunderbird sees the email without animation, even if it looks right where you tested it.
The fix for Thunderbird
Replace CSS animation with an animated GIF
<!-- Use an animated GIF for the effect -->
<img src="https://example.com/badge-animated.gif"
width="60" height="24" alt="New!"
style="display: inline-block; border: 0;" />Show the original
<style>
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
.badge { animation: pulse 2s infinite; }
</style>
<span class="badge">New!</span>The checker needs a computer screen.
A free account opens all 21 clients and keeps your checks for 7 days. Create a free account →
What Thunderbird does with animation
@emailens/engine 0.18.22 on the original code
Thunderbird does not support "animation".
Your next question
- Does bimi work in Thunderbird?
Works in 9 of 21 · not supported in 11 · 1 untested
- Does aspect-ratio work in Thunderbird?
Works in 5 of 21 · not supported in 16
- Does modern-color work in Thunderbird?
Works in 4 of 21 · not supported in 16 · 1 untested
- Does hyphenate-limit-chars work in Thunderbird?
Works in 1 of 21 · not supported in 17 · 3 untested
- Does <link> work in Thunderbird?
Works in 3 of 21 · not supported in 18
fix - Does [aria-hidden] work in Thunderbird?
Works in 13 of 21 · not supported in 7 · 1 untested
Questions
- How many email clients support animation?
- It works in 5 of 21, partial in 1, not supported in 15.
- What do I use instead of animation in Thunderbird?
- Replace CSS animation with an animated GIF.
- Does animation work in Apple Mail?
- animation works in Apple Mail. Closest to Thunderbird: Apple Mail, which agrees on 219 of the 261 features both are tested on.
To see what else in your email Thunderbird 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 10 installs · caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 7 Apr 2026 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping