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

This guide requires Klaviyo to be connected via Checkout Links. See Setting up Klaviyo integration first.

Quick Setup

Replace [customerId] in your link with this Klaviyo variable:

#{{ person.checkout_links_shortcode|default:'' }}

Your final link:

https://yourstore.com/your-campaign?c=#{{ person.checkout_links_shortcode|default:'' }}

Create Your Customer Link

1. Create a new link — Go to Checkout Links and click Create Link

2. Name your link — Give it a descriptive name like "Win-back Campaign" or "VIP Sale"

3. Set a custom slug — Enter a custom slug that matches your campaign, like winback or vip-sale

4. 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

5. 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

Add Promotions (Optional)

Pair your customer link with promotions to drive action:

• 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 popups 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

1. Save your link — Click Save to create your customer link

2. Copy the URL — It will look something like https://yourstore.com/your-campaign?c=[customerId]

Add the Link to Your Klaviyo Campaign

1. Open your flow or campaign — In Klaviyo, navigate to the flow or campaign you want to add the link to

2. Edit your email template — Open the email template

3. Find your call-to-action button — Locate the CTA button (e.g., "Shop now" or "Claim your discount")

4. Replace the link URL — Paste your Checkout Links URL into the button link field

5. Add the Klaviyo variable — Replace [customerId] with this Klaviyo variable:

#{{ person.checkout_links_shortcode|default:'' }}

Your final link will look like:

https://yourstore.com/your-campaign?c=#{{ person.checkout_links_shortcode|default:'' }}

This uses the Checkout Links shortcode, which is added to every profile automatically once you connect Klaviyo. It resolves to the customer's Shopify account and pre-fills their saved details — without ever exposing their customer ID.

Test Your Campaign

1. Save your template — Save your changes in Klaviyo

2. Send a test email — Use Klaviyo's preview and test feature. Select a customer profile

3. Click the CTA button — Open the test email and click your button

4. Verify the checkout — Confirm that customer details are pre-filled (name, email, shipping address) and any promotions are applied