PST file repair tools like Recoveryfix Outlook PST Repair fix corrupted Outlook data files by scanning the damaged PST file, identifying errors, and recovering emails, contacts, calendars, and other mailbox items. The PST repair software then rebuilds a new healthy PST file with the recovered data, ensuring complete data integrity. It supports large PST files, offers preview options, and restores deleted items, making it a reliable solution for Outlook data recovery.