Klarna On‑Site Messaging

Sell more with personalized payment offers

Since 2005, Klarna has been taking the friction out of payments for over 90 million consumers globally, allowing shoppers to pay later in interest-free payments as an easy, flexible alternative to credit. Join over 19,000 Shopify merchants that have already installed the On-Site Messaging App and show your customers payment plans are available while they’re still shopping, leading to more conversions at checkout for you.

On-Site Messaging is simple to integrate, and highlighting buy now and pay later options before checkout is proven to improve sales. The app provides customized messaging, ranging from banners promoting your partnership with Klarna and availability of payment options, to personalized promotions on product or cart pages.

Stores offering personalized messaging early in the shopping journey see increased average order values (AOV) of 25%, with 40% larger overall checkouts on average. Plus, Klarna users are more engaged, buying 20% more on average, and shopping more often.

Want to add On-site Messaging? First, our 3 simple steps below get you started with Klarna Payments and then you can install the On-site Messaging app.

STEP 1 | Sign up with Klarna

To get started, you’ll need to create a merchant account and sign up with Klarna at us.portal.klarna.com/signup.

STEP 2 | Get & save your Klarna API credentials

Generate new API credentials by going to Settings in the Merchant portal. Download and open the file; you'll need these API credentials in the next section.

STEP 3 | Install Klarna in your Shopify store

Go to the Klarna Payments setup wizard at klarnapayments.com/install# to guide you through the integration for Shopify.

Place a trial purchase to ensure everything is working correctly. Then head to the Klarna merchant portal to cancel (make sure you don’t pay yourself)!

Any questions?

~Visit our FAQ page, watch the installation video, or email the team directly: skosm@klarna.com. Our dedicated Support Team is standing by and responds within 2 working days.

~Click the Developer Website link at the top of this page if you are interested in finding out more about Klarna and our payment methods, need help, or have not yet signed up to offer Klarna.