How to add an animated GIF to your email signature
Add a moving GIF banner or logo to your email signature in Gmail, Outlook and Apple Mail, and avoid the mistakes that break it or send emails to spam.
A small animated banner under your name is one of the few ways to make an email stand out without being annoying. Think of a looping product shot, a "We're hiring" banner or a subtle logo animation. Done right, it gets clicks. Done wrong, it's a broken image icon or a 4 MB file that makes your emails crawl.
Do GIFs work in email signatures?
Mostly, yes:
| Email app | Animated GIFs |
|---|---|
| Gmail (web and mobile) | Play normally |
| Apple Mail (Mac, iPhone, iPad) | Play normally |
| Outlook on the web and Outlook mobile | Play normally |
| Outlook for Windows | Newer versions play them; some older versions show only the first frame |
Because some Outlook versions freeze on the first frame, make sure the first frame works on its own. Put your key message or logo in frame one, not halfway through the loop.
The one rule: the GIF must be hosted online
Email signatures can't carry images inside them. Gmail and Outlook strip out embedded images, so every image in a signature has to live at a public web address, and the signature simply points to it.
That's why "drag a GIF into the signature box" often works for you and shows a broken icon for everyone else. The file only existed on your computer.
The easy way around this is a signature tool that hosts the image for you.
How to add an animated GIF to your signature
- Open the free email signature generator and fill in your details.
- Go to "Animated banner" and upload your GIF (up to 1 MB). It's stored online for you and gets a permanent link. If you already host the GIF somewhere, choose "Paste a link" instead.
- Set where it links to, such as your current campaign or booking page, and adjust the width.
- Check the preview, then click Copy signature.
- Paste it into your email app's signature settings. See how to add an email signature in Gmail and Outlook for exact steps.
How to make a good signature GIF
- Keep it under 1 MB. Heavy images load slowly, look spammy to filters and eat your recipients' mobile data. Fewer frames and fewer colours shrink a GIF dramatically.
- Size it for the inbox. Around 400 to 600 pixels wide is plenty. Export it at that size rather than shrinking a huge file.
- Slow and subtle beats flashy. A gentle 3 to 5 second loop feels premium. Fast flashing feels like a 2008 banner ad.
- Make frame one count, for the Outlook versions that freeze there.
- Add a clear destination. A GIF that links somewhere useful turns attention into clicks.
You can turn a short screen recording or video into a GIF with free tools like Giphy's GIF maker or Ezgif, then trim it under 1 MB.
Common problems and fixes
The GIF shows as a broken image. The file isn't publicly hosted. Re-upload it through the signature generator, or use a public link.
The GIF doesn't move. You're probably viewing it in an Outlook version that only shows the first frame. Check in Gmail or Apple Mail.
Emails started going to spam. Large images and image-heavy signatures can hurt deliverability. Keep the GIF small and make sure there's real text in your signature too.
Frequently asked questions
Can you put a GIF in an email signature?
Yes. Gmail, Apple Mail and Outlook on the web and mobile play animated GIFs. The GIF must be hosted at a public web address, which the mktbox signature generator does for you.
Why is my GIF not moving in Outlook?
Some versions of Outlook for Windows only display the first frame of animated GIFs. Design your GIF so the first frame works on its own.
What size should an email signature GIF be?
Keep the file under 1 MB and around 400 to 600 pixels wide. Smaller files load faster and are less likely to trigger spam filters.
Is the GIF hosting free?
Yes. When you upload a GIF in the mktbox signature generator, it's hosted for free and linked from your signature.