Utilize OST to PST Online Converter to convert OST to PST online along with all type of data including mails, contacts, calendars, tasks, notes, briefcase, formatting, and attachments in an accurate form without misplacing any detail. Every user can easily convert OST to PST online in batch mode at once on any Windows Operating Systems i.e. Windows 11, 10, 8.1, 8, 7, XP, Vista, etc. First, try its free demo edition, which allows you to convert 25 items from OST folder to PST file including attachments without any charges. To convert bulk items from OST to PST online at once, then you need to buy license edition of the software.