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What is On-site messaging (OSM) and how do I activate it?

(OSM) is a tool used to let customers know that Klarna is available on your website. Here are some examples of what they might look like:

On-site messaging example
On-site messaging example

The service is available for all retailers using Klarna Payments or Klarna Checkout. And it’s free! Letting your shoppers know about the different payment options available to them before they reach the checkout can influence the purchase decision.All retailers using Klarna Payments or Klarna Checkout are able to use our manual HTML integration. Everything you’ll need can be found in the 

 of the Klarna Merchant Portal. Instructions on how to integrate using HTML can be found 

Some platforms have apps or plugins that make this process even easier! Click on your platform below for more information:

Still need help? Please contact our 


Monthly financing through Klarna and One-time card bi-weekly payments with a service fee to shop anywhere in the Klarna App issued by WebBank. Other CA resident loans at select merchants made or arranged pursuant to a California Financing Law license. Copyright © 2005-2024 Klarna Inc. NMLS #1353190, 800 N. High Street Columbus, OH 43215. VT Consumers: For WebBank Loan Products (One-Time Cards, Financing, Klarna Card): THIS IS A LOAN SOLICITATION ONLY. KLARNA INC. IS NOT THE LENDER. INFORMATION RECEIVED WILL BE SHARED WITH ONE OR MORE THIRD PARTIES IN CONNECTION WITH YOUR LOAN INQUIRY. THE LENDER MAY NOT BE SUBJECT TO ALL VERMONT LENDING LAWS. THE LENDER MAY BE SUBJECT TO FEDERAL LENDING LAWS.