Guide
On-site messaging for mobile
Native support for this feature is as easy as it gets by an actual native view supporting both iOS and Android.
Guide
Customize placements through Merchant portal
If you're not familiar with CSS or don't have access to your website's source code, use Klarna's Merchant portal to customize placements to better suit your website's design.
Guide
How to enable Express checkout in PrestaShop
This guide explains how to add Express Checkout to your PrestaShop store.
Guide
Manual On-site messaging
This guide covers the manual integration of Klarna On-site messaging with a Shopify store when the app isn’t compatible with your store.
Guide
Sign in with Klarna - React Native
Add Sign in with Klarna to your React Native app by integrating the Klarna In-App SDK, configuring native dependencies, and securely managing the sign-in flow and user data scopes.
Guide
Other operations
Implement proper token exchange, refresh, and validation using JWKS to support seamless and authenticated integrations.
Guide
On-site messaging JavaScript library
The JavaScript library delivers the core functionality of On-site messaging.
Guide
Before you start with Express Checkout
Ready to offer Klarna Express Checkout to your customers? Here's what you need to know before integrating the product with your store's website.
Guide
Integrate multistep Express checkout
Learn how to integrate the multistep Express checkout to support more robust checkout options.
Guide
Testing and integration checklist for Sign in with Klarna
Before you go live with Sign in with Klarna solution, follow this checklist to make sure your integration is tested and ready to be enabled in production.
Guide
How to install Express Checkout in WooCommerce
This guide explains how to add Express Checkout to your WooCommerce store.
Guide
App Block placements
Display Klarna On-Site Messaging on your Shopify store by installing the app and customizing dynamic or static placements across key pages for a tailored shopping experience.
Guide
Sign in with Klarna - iOS
In this step-by-step guide you will learn how to integrate Sign in with Klarna into your iOS app.