There are many tools available online for converting OST files to PST, but choosing a reliable and efficient solution is crucial. One highly recommended option is the GoldyTools OST to PST Converter.

This powerful tool enables users to convert single or multiple OST files with high accuracy and speed. Beyond PST, it supports a wide range of output formats including MSG, MBOX, HTML, PDF, EML, and EMLX. Additionally, it offers seamless conversion of OST files directly to popular email platforms such as Gmail, Yahoo, Thunderbird, Office 365, Yandex, and more.

Whether you're an individual user or managing large-scale data migration, the GoldyTools OST to PST Converter is designed to meet your needs efficiently and reliably.
https://www.goldytools.com/blog/get-familiar-with-manual-ways-export-import-mails-from-ost-into-outlook-pst/