10-03-2025, 06:02 AM
The best way to convert OST to PST without using Outlook is by using Aryson OST to PST Converter. This standalone software allows you to convert OST files without needing an Exchange profile or Microsoft Outlook installed. It supports bulk OST conversion and preserves emails, contacts, calendars, tasks, and notes with full accuracy. You can also preview data, remove duplicates, and apply filters for selective export. The tool supports over 15 file formats including PST, MBOX, EML, and CSV, and even migrates directly to platforms like Office 365 and Gmail. Whether you're dealing with oversized, orphaned, or inaccessible OST files, Aryson ensures safe and efficient conversion — making it the most reliable solution for users without Outlook.