Yes, Pinterest is free to use on PC. You can access Pinterest through your web browser on your computer without any cost. Simply visit the Pinterest website (pinterest.com) and sign up for an account if you don't already have one. Once you have an account, you can browse, search, save, and interact with content on Pinterest without any charges.
Pinterest also offers mobile apps for iOS and Android devices, and while the apps are free to download and use, they may include optional in-app purchases or advertising.