Should a countdown be an image or an iframe?
The answer is decided by the surface, not by preference: email gets an image because it has no other option, and the web gets an iframe because it is strictly better there. What matters is understanding the trade-off each one carries.
In email, an image is the only thing that works
Email clients do not execute JavaScript and strip iframes, so a countdown in the inbox has to be a picture that a server regenerates on each open. Everything else about email countdowns follows from this constraint: the fixed pixel size, the animation limits, the baked-in background that dark mode cannot recolor.
On the web, an iframe is better in every dimension
A web embed renders live HTML: the digits update every second rather than looping a short animation, the type stays sharp at any zoom or pixel density because nothing is a bitmap, and it costs your page no JavaScript because the timer runs in its own document. It also isolates styling in both directions — your CSS cannot leak into it and it cannot leak into your page.
<iframe src="https://tikio.io/e/a1b2.html?target=2026-08-01T20:00" title="Offer ends soon" width="480" height="140" frameborder="0" scrolling="no" style="border:0;"></iframe> The one thing an iframe costs you: clicks
A click inside an iframe does not bubble up to a surrounding link, so wrapping the embed in an anchor silently does nothing. Put your call to action on a button next to the timer instead. In email the opposite is true — the image is just an image, so wrapping it in a link works exactly as you expect and a ticking countdown is one of the most clicked elements in a campaign.
Keeping both in sync
The two formats should come from one design and one deadline, otherwise your landing page and your campaign eventually disagree — usually right after someone edits one of them. In tikio the same published design serves both and the URLs differ only by extension, so there is nothing to keep manually aligned.
.gif for the inbox · .html for the page · same design, same target= deadline FAQ
Can I use the iframe version in a newsletter platform like Ghost or beehiiv?
On the published web version of the post, yes. In the emailed version, no — those platforms strip iframes because no email client renders them. Use the image form for the email and the iframe for the web post.
Is a GIF or a PNG better for email?
A GIF, because it animates. A PNG would be sharper and support partial transparency, but it would show a single frozen frame — correct at the moment of opening and motionless afterwards.
Does the iframe hurt Core Web Vitals?
Not if you give it explicit width and height, which the generated snippet does — that prevents layout shift. It also adds no JavaScript to your bundle and does not block rendering of your page.
Build a countdown that behaves
Free during early access — no watermark, no credit card.
Create your free countdownSetting one up? See guides for your email platform or website embed guides.
Last updated: 2026-08-01.