How can I convert OST to PST using Cigati OST to PST Converter?

Follow these steps to convert OST files to PST file format: Download and install the Outlook OST to PST Converter Tool on your PC. Launch the tool and pick Single File/Multiple Files or Select Folder to add the OST file(s). Click Next . Click on the Select File button, browse the OST file, and Open the desired OST file. Expand the folder tree, select the files to convert, and preview the OST data. Next, pick File Formats and choose PST from the drop-down list. Now, apply the necessary filters and choose the Path to Save the resultant file. In the end, click on the Convert button to start the conversion.

OST to PST Converter to Convert Offline OST Files to PST

Q: Is it safe to use the Cigati OST to PST Converter, and does it offer a free version?

Yes. The Offline OST to PST Converter Tool is secure and dependable, but it is not a free solution. The free version permits conversion of 50 emails per folder, whereas the licensed version removes this limitation.

Benefits of

The Best OST to PST Converter

Easily convert OST to PST with full data integrity of emails, calendars, contacts, and attachments.
Designed to convert single or multiple OST files to PST and other supported formats.
Protect the original folder layout, metadata, and email properties with complete accuracy.
Seamlessly convert OST files into PST, MBOX, EML, EMLX, MSG, and more.
Enables export to document formats such as PDF, DOC, DOCX, DOCM, HTML, and MHTML.
Offers an option to save contacts as a VCF and calendar data into ICS format.
Supports OST migration to Office 365, Gmail, Google Workspace, Yahoo, IMAP, and more.
Allows users to examine or preview all mailbox contents before starting the conversion process.
Convert large OST files seamlessly without any size limitations using the OST to PST Converter.
Identifies and deletes duplicate emails based on To, From, Subject, Bcc, and Body.
Optimize storage space by backing up emails without including attachments.
Operates on all Windows OS and Microsoft Outlook versions.

Exclusive Features

OST to PST Converter Tool

Secure

End-to-end Secure OST to PST Conversion

The Cigati OST to PST Converter Tool guarantees secure and complete OST to PST conversion, while retaining all essential data such as emails, contacts, calendars, and attachments. Throughout the conversion, it ensures a safe conversion without losing any valuable information.

Bulk Conversion

Efficient Bulk or Single OST File Conversion

The Cigati software can convert one OST file or an entire enterprise mailbox library simultaneously into PST and other formats, simplifying bulk data management and migration. Users can perform migration in full throttle with no downtime across large deployments.

Multiple files

Easily Save OST Files Locally in Multiple Formats

With the help of the Outlook OST to PST Converter, users can export OST data directly to PST, MBOX, EML, EMLX, MSG, and more. Also, it can export to document formats such as PDF, DOC, DOCX, DOCM, HTML, and MHTML. Moreover, conversion to image formats like OST to PNG, GIF, TIFF, and JPG. became easy.

Cloud

Seamlessly Migrate OST Data to Cloud-based Services

The OST to PST Conversion Tool migrates directly into email clients such as Office 365, Google Workspace, Gmail, AOL, Hotmail, Yandex, Yahoo, IMAP, Zoho Mail, and iCloud using modern authentication. This ensures secure, enterprise-grade connectivity without legacy credential exposure.

Contact

Convert Contacts and Calendars from OST Files

With the convert OST to PST Tool, users can convert OST contacts to VCF and calendar events to ICS format, allowing smooth sharing and universal accessibility across different email clients, mobile devices, and productivity applications.

Without Attachments

Perform Email Migration without Attachments

The OST to PST Converter helps users save storage space by backing up emails without attachments, giving enterprises granular control over file size, compliance, and data governance. This ensures seamless handling of bulk data without affecting the system performance.

Date Range

Date-Range Filtering with Custom Folder Naming

With the Cigati OST to PST Software, users are provided with the ability to filter emails by date by defining precise start and end dates to scope conversions and assign personalized folder names to output PST files, ensuring consistent metadata and easier archival.

Comaptible

Universal Platform Deployment

The Cigati software is fully compatible with Windows and macOS environments. The solution can be implemented across mixed operating system environments. The enterprise IT teams can standardize on a single backup solution regardless of endpoint or server operating system.

Technical Specification

Software Prerequisites & Recommendations

Software Name:	Cigati OST to PST Converter
Version Support:	Windows 11 & below versions
Size:	176 MB
Version:	23.09
Last Updated:	April 2026
Download Link:	Download

Processor:

Hard Disk:

Memory:

Operating System:

Trial limitation:

The Offline OST to PST Converter is trial software. It is for evaluation purposes and can back up only 50 items per folder. For unlimited conversion, consider purchasing the full version.

Download Guide:

Software Guide

Installation / Uninstallation

Eula

FAQ:

Software Features	Free Version	Full Version
Easily Convert OST to PST	50 Items per folder
Convert OST files to PST, MBOX, PDF, EML, EMLX, and more	50 Items per folder
Import single or multiple OST files
Preview OST emails along with attachments
Filter out duplicate emails before conversion
Export OST data to Gmail, Office 365, Yahoo, IMAP, Zoho Mail, and more	50 Items per folder
Apply Date-Range Filter for specified scope conversions
Export contacts and calendars to VCF and ICS formats	50 Items per folder
24*7 Tech Support & 100% Secure
Download and Purchase	Download	Purchase

FAQ

Frequently Asked Questions

Follow these steps to convert OST files to PST file format:

Download and install the Outlook OST to PST Converter Tool on your PC.
Launch the tool and pick Single File/Multiple Files or Select Folder to add the OST file(s). Click Next.
Click on the Select File button, browse the OST file, and Open the desired OST file.
Expand the folder tree, select the files to convert, and preview the OST data.
Next, pick File Formats and choose PST from the drop-down list.
Now, apply the necessary filters and choose the Path to Save the resultant file.
In the end, click on the Convert button to start the conversion.

Yes. The Offline OST to PST Converter Tool is secure and dependable, but it is not a free solution. The free version permits conversion of 50 emails per folder, whereas the licensed version removes this limitation.

You can easily view all mailbox items in an OST file without MS Outlook. Simply download a free version of Cigati OST to PST Converter tool, choose the OST file, and view all mailbox data without installing Outlook.

Yes. The tool is capable of handling oversized OST files and allows batch conversion without any data loss, maintaining the mailbox folder structure.

No. The Microsoft OST to PST Converter cannot convert corrupted OST files. However, you can first repair the damaged file using an OST Recovery tool and then convert it to PST.

Client Review

A Glimpse into Client Experiences

Thousands of satisfied customers have chosen our software and praised its reliability and performance. They have shared positive stories about how the Cigati OST to PST Converter has helped them manage their data efficiently.

"We migrated 3,200 mailboxes across six offices with no downtime, zero data loss. Our IT Administrators ran the entire operation from a single machine. Cigati performed exactly as promised, migration in full throttle."

Marcus R | France

"As an IT Consultant, I've tried every tool on the market. Cigati OST to PST Converter is the only one I trust for client-facing migrations. It maintained the folder hierarchy throughout the conversion. "

Sophia | USA

"Our startup needed to move fast during a Microsoft 365 rollout. The convert OST to PST Tool had us fully migrated over a weekend. Business users didn't even notice anything changed, that's exactly what we needed."