API and SDKsSupport
An effortless integration. Designed for growth.
Explore guides and code examples to get started with Klarna
Quick access
Flexible payments
Conversion tools
Developer resources
Testing tools
Marketing resources
Integrate Klarna solutions through one of our partners.
Enable Klarna payments
Learn how to integrate Klarna payments in your checkout
Payments
Live
Guide
Test Klarna products
Follow our guide to test and enable our solutions.
Testing tools
Guide
Boost sales with messaging
Growth your business by promoting the availability of Klarna with our On-site messaging.
Conversion boosters
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Sign in with Klarna
Customers' favorite way to sign in. Let customers safely sign up for your platform using their Klarna account.
In-app payments
Give customers the ability to pay with Klarna without leaving your mobile app.
Express checkout
Make your checkout 5x faster.