Do animated email signatures work in Gmail, Outlook and Apple Mail?

An animated email signature can make a strong first impression, but email clients are far more limited than web browsers. There's no JavaScript, no CSS animation you can rely on, and no video. The one format that animates across most inboxes is the humble GIF.

Why GIF is the only safe choice

Most email clients strip scripts, ignore or rewrite stylesheets, and block embedded video for security reasons. CSS keyframe animations work in a handful of clients but silently fail in others. A GIF is just an image, so anywhere images load, the signature at least appears — and in clients that support animation, it moves.

How the major clients behave

• Gmail (web and mobile apps) plays animated GIFs in signatures.
• Apple Mail on Mac, iPhone and iPad plays animated GIFs.
• Outlook on the web and the new Outlook generally play GIFs.
• Classic Outlook for Windows has historically shown only the first frame of a GIF, so the first frame needs to work on its own.

Always ship a static fallback

Every animated asset in a SignatureCraft signature comes with a matching static version whose first frame is identical. If a client can't animate, recipients still see a crisp, finished signature. Our editor won't let you export an animated signature without that fallback in place.

Keep the file light

A signature is attached to every email you send, including replies. Short loops, limited colour palettes and modest dimensions keep GIFs small so they load fast and don't push long threads toward size limits.