You can convert OST to PDF without having to use Outlook. The standalone OST to PDF converter allows you to import your OST files directly into the software so that you can export them to PDF while retaining the original email formatting, attachments, and folder structure of each email. Some of these programs allow you to filter the emails by date, sender, or subject before converting them, which saves time and effort when converting a large number of emails. Most of these specialized conversion tools, such as FixVare OST to PDF Converter, are designed to work well with even large OST files, and do not require any configuration of Outlook before you can convert the emails to PDF format.
Read More Info: https://www.fixvare.com/products/ost/pdf/

Easily convert OST files to PST with the advanced Recoveryfix OST to PST Converter Tool. This OST to PST Converter tool recovers inaccessible, orphaned, or corrupted OST data and exports it into PST format without losing any email properties. It supports emails, contacts, calendars, attachments, and more. With its user-friendly interface and fast processing, it ensures secure, accurate, and hassle-free OST to PST conversion for seamless Outlook access.

https://www.recoveryfix.com/ost-to-pst-converter.html

When users need to convert OST to PDF format, they often go to the manual method, but when users need to convert OST to PDF without Outlook. It can only be possible with a professional tool like WholeClear OST to PDF format. It can easily convert OST files to PDF format without any Outlook or Exchange Server installations. It can easily convert multiple or single OST files to PDF format. It can also handle corrupted or inaccessible OST mailbox files by converting them into PDF format. Additionally, provides a demo version for all users.
Get More Info: https://www.wholeclear.com/ost/pdf/