| 1.0 | July 2018 | |
| 2.0 | January 2019 | |
| 3.0 | June 2019 | |
| 5.0 | February 2020 | |
| 6.0 | September 2020 | Upgraded Klarna Payments SDK to version 4.0.1. Updated the user agent. Enhanced On-site Messaging. Introduced support for the Oceania region.
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| 7.0 | March 2021 | Added support for SAP Commerce 2005. Fixed issues related to email notifications, auto-capture, and data handling. Updated documentation.
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| 7.1 | January 2023 | |
| 7.2 | August 2023 | |
| 8.0 | March 2024 | Introduced Klarna Express Checkout with improved handling for multistep checkouts, redirects, order creation, and localized initialization. Added new admin panel options to toggle the Express Checkout button and configure the Client Key. Upgraded the On-site Messaging library and expanded customization options.
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| 9.0 | October 2024 | Launched “Sign in with Klarna.” Improved Klarna credentials configuration, payment handling, and Express Checkout workflows. Added an authorization callback feature. Seamlessly migrated existing merchants to the new configurations for a robust, streamlined experience.
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| 9.1 | January 2025 | |