Klaviyo doesn't have a built-in countdown; its help center says to use an outside tool and paste the code into an HTML block. Create the timer here, copy the HTML from the Klaviyo tab and paste it into an HTML block in your campaign or flow email. For a per-person deadline, add ?rid={{ person.KlaviyoID }} to the URL.
Klaviyo doesn't have a countdown block of its own. Its help center says so and points you to an outside tool: you build the timer elsewhere and paste its code into an HTML block. That's what this page does. The generator below already has the Klaviyo output selected.
Based on Klaviyo's official documentation, reviewed on October 1, 2026.
The generator is already set up for this page. Change what you need and press Create timer.
Animated GIF. Recalculated every time the email is opened.
HTML block. This is the method Klaviyo documents and the one we recommend. You paste a table holding the timer image, which is requested from our server every time someone opens the email. Klaviyo's guide doesn't mention any plan restriction for this block.
Image block. Klaviyo supports dynamic images through a "Dynamic variable or dynamic URL" field, meant for profile or event variables. Klaviyo's documentation only shows profile and event variables in that field, not an external URL. If an image ends up stored as a copy in Klaviyo's library, that copy never updates and the timer freezes. Use the HTML block.
The code already has its & escaped and the background color set on the table, so you won't get white gaps around the GIF.
Flow emails use the same HTML block. Open the flow, click the email, go into the editor and repeat steps 4 to 6.
With a fixed date, the flow can send the email on any day: the GIF is rendered at open and shows what's left until that date. If the email goes out after the deadline, the reader sees your expired message.
For flows where each person gets their own window (abandoned cart, a welcome email with a 48-hour coupon), create an evergreen timer and add the recipient tag, as described next.
An evergreen timer counts a duration, say 48 hours. The question is when it starts:
For the second option, add the profile ID to the image URL:
https://kauntodaun.com/t/k3x9q2m7ab.gif?rid={{ person.KlaviyoID }}
According to Klaviyo's tag guide, {{ person.KlaviyoID }} returns the profile's Klaviyo ID. It's case-sensitive. Don't use {{ person.id }}: that's the external ID, which many profiles don't have. On the Starter plan, the Klaviyo tab in the generator already includes the tag in the code.
We store the ID as a hash, never in plain text. If the tag arrives empty or unreplaced, the engine ignores it and counts from that moment.
If you also send from another tool, see the guides for Mailchimp, HubSpot and Shopify Email. For dated campaigns, the Black Friday and Cyber Monday countdowns are ready to go.
No. Klaviyo's help center says it doesn't have a built-in countdown timer and that you need an outside tool, pasting its code into an HTML block.
Yes. The HTML block is in the same editor for campaigns, templates and flow emails. The GIF is rendered when the email is opened, so the flow can send it on any day.
{{ person.KlaviyoID }}, which Klaviyo's tag guide says returns the profile's Klaviyo ID. Tags are case-sensitive, so type it exactly as shown.
It works, but the email address would travel in the image URL and end up in the logs of any server in between. Our engine hashes it anyway, but it's better not to send it. Use the ID.
If the tag arrives unreplaced, the engine ignores it and counts from that moment. When you preview with a profile selected, the tag does get replaced.
Klaviyo's countdown guide doesn't mention any plan restriction for the HTML block. We haven't checked it on a free account.
Klaviyo notes that Outlook 2007, 2010 and 2013 show only the first frame, and that countdowns may not render correctly in Apple Mail because it preloads images. Put the deadline in the copy too.