Import OST to Google Workspace: Step-by-Step Guide

Written By Simran Bhatia
Updated on April 15th, 2026

User Query:

“I recently switched to Google Workspace from Outlook, and I have a lot of OST files. Now I have no idea how to get all that old email data into Gmail. Would really appreciate it if someone could walk me through it.”

Summary: Switching from Outlook to Google Workspace is fine until you realize your OST files don’t just move over on their own. All that old email, contacts, and calendar data stays stuck unless you know what to do with it. This blog walks you through a manual way to import OST to Google Workspace and also covers a dedicated tool called CloudXena OST Converter Tool.

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Why Import Outlook OST to Google Workspace?

Switching to Google Workspace means your OST email data needs to move along with you.
OST files stay locked to Outlook, so accessing them elsewhere becomes a real headache.
Google Workspace works from any device, making your emails way more flexible and reachable.
Migrating keeps all your old emails, contacts, and calendars safe inside your new workspace.
Teams collaborating on Google Workspace need everyone’s data in one place to actually work smoothly.
Staying on Outlook just for old emails slows down your full switch to Google Workspace.
Google Workspace offers better storage and security, so migrating your OST data just makes sense.
Once imported, your old Outlook data becomes searchable, shareable, and far easier to manage daily.

Manual Method to Import OST to Google Workspace (Free Way)

There’s no direct option to move an OST file into a Google Workspace account. It takes time and may not always be perfect, but here’s the process in simple terms:

Steps to Transfer OST file to Google Workspace

Open Microsoft Outlook and convert your OST file into a PST file using the export option.
Go to your Google Workspace (Gmail) account in a web browser and log in.
Make sure IMAP is enabled in your Gmail settings so data can be imported.
Download and install the Google Workspace Migration for Microsoft Outlook (GWMMO) tool.
Launch the tool and sign in with your Google Workspace account.
Choose the option to import data from a PST file.
Browse your system and select the PST file you created earlier.
Pick what you want to migrate (emails, contacts, calendar, etc.).
Click Next and follow the instructions to upload OST File to Google Workspace.
Wait for the process to complete and verify your data in your Gmail account.

What are the Drawbacks?

You cannot upload an OST file directly. It must be converted to PST first, which adds an extra step.
The whole process is slow, especially if the mailbox size is large.
Some emails, attachments, or details may not transfer properly.
You need to set up IMAP and use different tools, which can be confusing.
If the original Outlook profile is not available, accessing the OST file becomes difficult.
You cannot migrate multiple OST files at once. Each file has to be processed separately.
There are no advanced settings to filter data during migration.
The original folder hierarchy might not stay the same after migration.
A stable and fast connection is required to upload data without interruption.
If something goes wrong, there is no dedicated help for this free method.

Effective Solution to Import OST to Google Workspace

The CloudXena OST Converter tool lets you move OST files to Google Workspace without requiring Outlook to be installed. It connects to your G Suite account using OAuth, so the login part is handled securely. The tool reads your OST files and transfers the data directly into Google Workspace. Emails, folders, and attachments come through as they were in Outlook. It doesn’t mess up the folder structure during the process. You can run it for multiple mailboxes at once, and there’s no file size limit. Also, rather than G Suite, the tool helps to import OST to Gmail and other popular email clients.

Steps to Import OST File to Google Workspace

Download the OST Converter Tool.

Then, add the OST files and click the Next button.

Select and preview emails and attachments, and click Next.

Choose G Suite and use its credentials to sign in.

Lastly, apply the filters and click Convert.

So What’s the Right Choice

That’s how you can import OST to Google Workspace. We covered a free manual way and a proper tool, and looked at when each one makes sense. The manual method works fine if you only have a few files. But if you’re dealing with a large number of mailboxes, it gets complicated fast, and things can go wrong. In that case, using a proper converter tool is just the more reliable option. It saves time, and you don’t have to worry about losing anything in the process.

Frequently Asked Questions

Q1. Does the software support batch upload OST File to Google Workspace?

Ans. Yes, the CloudXena OST Converter Tool supports batch migration. You can add multiple OST files or mailboxes at once and transfer them to Google Workspace in a single process. This saves a lot of time compared to the manual method.

Q2. Can I transfer OST file to Google Workspace without attachments?

Ans. Yes, the tool gives you the option to exclude attachments during migration. You can choose to move only emails, contacts, or calendar data based on your needs.

Q3. Is it possible to import Outlook OST to Google Workspace with selective data?

Ans. Yes, the CloudXena OST Converter Tool allows selective migration. You can apply filters such as date range, specific folders, or item types to transfer only the required data instead of the entire mailbox.

Q4. How can I import OST to Google Workspace using this tool?

Ans. You can follow these simple steps using the CloudXena OST Converter Tool:
I. Download and install the tool on your system.
II. Add the OST files you want to migrate.
III. Preview and select the required data.
IV. Choose Google Workspace as the destination and sign in.
V. Apply filters if needed and click Convert to start the migration.

About The Author:

Simran Bhatia

I, Simran Bhatia am a Technical Content Writer specializing in data management, email migration, and data recovery IT solutions. My focus is on simplifying complex processes into clear, practical guides that combine technical accuracy with real-world value for IT admins, decision-makers, and everyday users. For me, writing is not just about explaining technology, it’s about making it accessible, reliable, and valuable for readers.