Create customer links that automatically pre-fill checkout with the customer’s shipping details - name, email, and address already entered. This reduces friction and increases conversion on any Klaviyo campaign.
Why Use Customer Links
Every extra field a customer has to fill out is a chance to lose them. With customer links, returning customers skip straight to payment:
- Pre-filled checkout - Name, email, and shipping address already entered
- Works with any campaign - Win-backs, promotions, new product launches, newsletters
- Higher conversion rates - Less friction means more completed purchases
- Optional promotions - Add discounts, free shipping, or gifts
Quick Setup
Replace [customerId] in your link with this Klaviyo variable:
{{ person.id|default:'' }}
https://yourstore.com/your-campaign?c={{ person.id|default:'' }}
Create Your Customer Link
Create a new link
Go to Checkout Links and click Create Link.
Name your link
Give it a descriptive name like “Win-back Campaign” or “VIP Sale”.
Set a custom slug
Enter a custom slug that matches your campaign, like winback or vip-sale.
Enable Dynamic mode
Toggle on Dynamic to enable customer data pre-filling via the ?c= URL parameter. When a customer ID is passed, their checkout will be pre-filled with their saved details.
Add products (optional)
In the Cart card, add any products you want to feature in this campaign. Unlike reorder links, customer links don’t automatically add previous purchase items.
- Win-back campaigns - “We miss you! Here’s 20% off”
- VIP sales - Early access with exclusive discounts
- New product launches - Free shipping on the new collection
- Seasonal promotions - Holiday discounts for existing customers
Combine with Pre-checkout extensions to let customers modify their cart before checkout - great for fashion brands where customers might need to change sizes, or for adding optional upsells. Copy Your Link
Save your link
Click Save to create your customer link.
Copy the URL
Copy the link URL. It will look something like:https://yourstore.com/your-campaign?c=[customerId]
Add the Link to Your Klaviyo Campaign
Open your flow or campaign
In Klaviyo, navigate to the flow or campaign you want to add the link to.
Edit your email template
Open the email template.
Find your call-to-action button
Locate the CTA button (e.g., “Shop now” or “Claim your discount”).
Replace the link URL
Paste your Checkout Links URL into the button link field.
Add the Klaviyo variable
Replace [customerId] with this Klaviyo variable:{{ person.id|default:'' }}
https://yourstore.com/your-campaign?c={{ person.id|default:'' }}
This uses the Klaviyo person ID, which is always available on every profile. If you have Shopify customer IDs synced to Klaviyo, you could use those instead, but the person ID is more reliable.
Test Your Campaign
Save your template
Save your changes in Klaviyo.
Send a test email
Use Klaviyo’s preview and test feature. Select a customer profile.
Click the CTA button
Open the test email and click your button.
Verify the checkout
Confirm that customer details are pre-filled (name, email, shipping address) and any promotions are applied.
