Klarna Docs - Sign in with Klarna

Sign in with Klarna

Sign in with Klarna is a social login feature built for shopping. It lets customers quickly and safely sign up for your platform using their Klarna account information.

Sign in with Klarna makes highly personalized shopping experiences possible by leveraging consented user data. This means no more passwords and a checkout that’s been pre-filled, saving time for shoppers and boosting conversion.

Read our integration guide to get started.

Sign in with Klarna
Faster sign in
Onboard customers 6x faster than with a regular email and password authentication.
Prefilled forms
Offer the smoooth shopping experience customers expect.
Free to use
Already our partner? Get the standard offering at no additional costs.
Sign in flow optimized for conversion
Streamline the sign in, link to reward programs, and offer highly personalized shopping experiences, all with a single solution.
150M
customers enjoy a returning shopping experience.
+7%
uplift in conversion for recognized and prefilled users.
Before you start
Everything you need to know before starting the integration.
More info
Integration best practices
Follow our guides to maximize the performance of your integration.
More info
Customization
Adjust the design of the button to match the look and feel of your website.
More info
On-site messaging
Combine our quick and secure sign-in option with dynamic messaging for a convenient shopping experience.
More info
What our merchants say

"The ability to sign in with Klarna makes it easier and faster to post and resell your previous Klarna purchases on Tradera. With a few clicks, you have created an account and are ready to sell."

TRADERA, Stefan Öberg, CEO

See it in action