If you want to recover your corrupted OST files then try most demanding PDS OST to PST Recovery Software. It recovers all OST file into various file format such as EML, MSG, MBOX, HTML, PDF and Office 365 file format. For more information you can visit on mention link.
If you want to recover your OST file download Shoviv Exchange OST Recovery Software. This Software repair damaged and corrupted OST files restore them into generic healthy formats and recover permanently deleted Emails, Contacts, Calendars, Tasks, Journals and all from Microsoft OST Files.
If you are looking for perfect tool, then you can go with eSoftTools OST to PST Converter. This tool is full with features and is best in performing large OST to PST conversion without any size limit. You can instantly convert OST file into 6+ different formats like Office 365, MBOX, CSV, EML, MSG, vCard, HTML, PST Outlook and check the conversion format with smart preview features. A FREE DEMO version is available of this tool easily up to 50 emails can be converted into all formats.
Get more info:- Convert OST to PST