Try the Advik OST Converter to upload OST file into Gmail account. This smart utility allows you to transfer complete OST file contents--including emails, attachments, contacts, and calendars--directly to your Gmail account without the need for Outlook installation. With its intuitive interface, you simply add the OST file, select Gmail as the destination, enter your login credentials, and begin the upload. The tool preserves the original folder structure and ensures that no data is lost or altered during the process.