Fiscal Host: Jitesoft

Collective for the Personnummer FOSS project


Become a financial contributor.

Financial contributions

Custom contribution


Make a custom one time or recurring contribution.
Recurring contribution


Become a backer for SEK 5.00 per month and help us sustain our activities!

Starts at

SEK 5 SEK / month

Recurring contribution


Become a sponsor for SEK 100.00 per month and help us sustain our activities!

Starts at

SEK 100 SEK / month


Let’s get the ball rolling! This is where things get planned and sometimes this is where things get done. Ask questions, thank people for their efforts, and contribute your skills to the service of the community.

Personnummer is all of us

Our contributors 3

Everyone who has supported Personnummer. Individuals and organizations that believe in –and take ownership of– our purpose.


Personnummer is a small open-source project that validates, formats and determines sex and age from Swedish personal identity numbers.

It's available in different programming languages, e.g: C#, Dart, Go, Java, JavaScript, Kotlin, PHP, Python, Ruby and Swift.