Installing Klarna Official Checkout

  1. Start by navigating to the Modules tab in your PrestaShop backoffice.
  2. Scroll down until you find the search function for your modules, type in and search for: klarnaofficial. You will receive one hit for the search Klarna Official Checkout. After that click install.
  3. Now you will have information from PrestaShop Add-ons where you can find a large blue button to download the integration - save it to your computer.
  4. Go back to Modules in your backffice and select "Add a new module" at the very top right corner.
  5. A new block with the topic "Add a new module" will expand below - select Choose a file and locate the .zip-file that you've downloaded to your computer and then click on "Upload this module"-button.
  6. The module will now be available in your system to be installed. After submission, you can scroll down and see that the button has changed name to "Install" for Klarna Official module.
  7. When module has been installed, you will be automatically redirected to the module´s configuration page.

Difference between Klarna Checkout and Klarna Payments

Klarna Checkout​ is a complete online checkout solution designed to increase sales and customer loyalty. Klarna as your single payment provider keeps everything under one roof. You’ll have one agreement, one point of contact, one settlement file, one payout with ​Klarna Checkout​.

Klarna Payments are standalone payment methods. With Klarna Payments you can complement your checkout with a Klarna widget located in your existing checkout

Based on the solution selected, the respective contract must be agreed and approved. Signing up for a Klarna Checkout account with Klarna, you should use the Klarna Official Checkout module, if you signed up for the Klarna Payments contract, then you should use the Klarna Payments module.

Generate API credentials

The Klarna API credentials for testing can be generated by following the steps here.

The production/live Klarna API credentials are different and require a contract with Klarna. This can be initiated via the on-boarding flow when registering your business/shop for transacting with Klarna, and are found in the Settings app in the Klarna Merchant Portal. Please choose the right market first.


You can also upload the .zip-file to your modules/ catalog via FTP and locate the module by searching for "klarnaofficial" in the Modules tab. Download the module version appropriate for your shop (v1.7.1+ or v1.6.1.+)