Google Inc. acquired the photo- editing site Picnik Inc., according to a company blog, adding to its Picasa picture-storing service.

Picnik is a cloud-based photo editor that is integrated directly into Flickr, SmugMug and other photo repositories. The Picnik tool allows users to crop, touch-up and add effects to photos.

Financial terms of the deal weren’t disclosed by either companies.

Ironically, Picnik is also Flickr’s default photo editor, which is owned by Yahoo, a direct competitor to Google.

The acquisition won’t affect users of the site in the near future, Picnik said today on its blog.

The photo editing startup, which has 20 employees, has millions of visitors monthly, according to the site.