Mailster

Free tool

Email countdown timer generator

Build a countdown timer your emails can actually use. Pick a deadline, style it, and copy a copy-paste HTML snippet that works in Gmail, Outlook and Apple Mail.

The deadline is the same instant for everyone, no matter where they open the email.

Your hosted renderer or animated GIF endpoint. We append the timer settings as query parameters.

Optional. Where the timer should take people when they tap it.

Size
Style

Leave blank to use the deadline we work out from your settings.

Live preview

Your email shows this as an image, so it keeps ticking even when JavaScript is blocked.

HTML snippet

Why the timer is an image

Email clients strip JavaScript and most reject CSS animations, so a live clock cannot run inside the message. A hosted countdown image is the one approach Gmail, Outlook and Apple Mail all render.

  1. 1

    Host a renderer

    Point a small script or CDN rule at a URL that draws the remaining days, hours, minutes and seconds for the end timestamp.

  2. 2

    Paste the snippet

    Drop the generated table into your email builder's HTML view or template.

  3. 3

    Keep a text fallback

    Some inboxes block images by default. The fallback line and alt text keep the deadline visible.

  4. 4

    Verify before sending

    Open the image URL in a browser and check it renders the time you expect, then test the full email.

Query parameters we append

Your endpoint receives these so it can draw the right timer.

Parameter Example Meaning
end1789000000Deadline as a Unix timestamp in seconds.
tzAsia/KolkataTimezone the deadline was set in.
labelOffer ends inText shown above the timer.
doneThis offer has endedText shown once the countdown passes zero.
themeboxesBoxes or inline layout.
labels1Whether to draw the unit labels.
bg, fg, accent0f172aColours as hex without the hash.
sizemdSuggested render size.