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Welcome to Klarna Docs
Choose your Acquiring Partner or Platform and explore guides for an effortless integration, designed for growth.
Integration with Adyen
Integration with Paytrail
Integration with Worldpay
Integration with Stripe
Integration with Kustom
Integration with Mollie
Integration with Shopify
Integration with Nuei
Integration with Adobe
Direct integration with Klarna
Integration with Prestashop
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Maximize your sales
Integrate the full set of Klarna features that boost conversion and simplify checkout.
  • 1
    On-site Messaging
    Show dynamic payment options across your site to drive engagement.
  • 2
    Express Checkout
    Enable direct checkout from cart or product pages for higher conversion.
  • 3
    Dynamic Checkout Presentation
    Auto-optimize payment methods per user and region to optimize approval and conversion rates.
  • 4
    Conversion and experience optimization
    Share rich transactional data for line items, shipping, and order details via API for seamless fulfillment and optimized conversion.
Developer Resources
Tools and references to support your Klarna integration.
API & SDK Reference
Explore detailed API and SDK specifications to help you build and extend your integration.
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Testing Checklist
Verify your integration using the provided test cases to ensure every feature works as intended before going live.
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Error Handling
Explore the error codes and messages to understand common failure scenarios and strengthen your integration’s error handling.
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