Free Online OST to PST Converter

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No Need Outlook or Exchange Server
100% Free, no hidden costs
Guaranteed Data Privacy
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What is Online OST to PST Converter?

It’s a web-based OST file conversion tool that allows standard users and administrators to directly convert their inaccessible, orphaned OST file into a fully working portable PST. Convert emails, calendars, contacts, notes, journals, and other mailbox items. The output PST file retains the same folder & sub-folder structure and data item placement as the source OST file.

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This OST to PST Free Converter Helps to:

Recover Emails from Orphaned OST Files

When a mailbox is deleted from Exchange or the user profile is removed, the OST file becomes orphaned. Conversion to PST recovers that data.

Counter Exchange Server Crash

Multiple server crashes or sync failures can corrupt OST file indexing. Convert OST to PST and restore the mailbox structure.

Migrate Email to New Outlook or System

The OST files are tied to an Outlook profile. Saving mailbox items to PST allows accessing OST file items in Outlook on another system.

Why Trust Our Online OST to PST Converter Tool?

Convert OST to PST for Free

Convert up to 500 MB of OST file data for free. No credit card information or payment is required.

Your Data Is Safe

Not a single mailbox item is retained on our servers. The uploaded OST file is automatically removed after conversion.

Complete Mailbox Conversion

Convert and save all the OST file items, including email (with attachments), calendars, contacts, folders, etc., to PST.

Convert without Outlook or Exchange

No need to install any tool. Direct drag and drop for OST to PST file conversion.

Convert OST From Any Device

No device or OS limitations. Convert OST files from Windows, macOS, Unix, or Mobile device.

Preserve Email Metadata

Convert emails with original attributes, like From, To, BCC, Subject, Date & Time stamp, etc., with attachments.

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Free vs. Paid Plan

Check out what the paid license version of the OST to PST converter offers.

Free Plan

$49

  • Convert 500 MB of data for free
  • Lifetime free
  • Use on any system
  • Drag & drop OST file conversion
Starter Plan

$199

  • Validity - 1 Year
  • System Limit - 2
  • No file size or data conversion limits
  • Find and save specific emails
Corporate Plan

$399

  • Validity - Lifetime
  • System - 250
  • All starter plan features included
  • Save to email servers or web-based email clients

FAQs

Find the answers to most commonly asked questions regarding our OST to PST converter software.

How long does the converted OST file remain on your server?

The OST file is deleted as soon as the conversion is completed. No copy or snapshot of the OST file is retained.

What happens to my original OST file?

The source OST file on your system stays as it is, with no change or data loss.

How to convert an OST file of 150GB?

The online converter only supports converting up to 500 MB of data from the uploaded OST file. To convert a large-sized OST file, you can try our desktop OST to PST converter.

I have a multi-folder structure in the OST file. Will it be preserved during conversion?

Yes. All the folders from the source OST file will be present in the PST file with the same folder hierarchy.

How are the attachments handled?

All the email attachments will be present in the output PST file with no change in file type or quality. Moreover, the inline images in the email header are also preserved.

Do I have to pay fees to download the converted OST file?

No. Conversion is absolutely free. You do not have to pay anything before downloading the converted OST file.

My OST file is severely corrupted. How can I convert it to a healthy PST file?

For a damaged OST file, you must use our desktop-based OST converter tool. It allows you to deeply scan and restore all mailbox items with complete integrity to PST.

I have multiple OST files; can I convert all of them together?

You can upload and convert only a single OST file to PST at a time. To convert multiple OST files at the same time, upgrade to our desktop tool.

Can I use any web browser, or should I prefer Microsoft Edge for conversion?

Use any internet browser. Be it Google Chrome, Mozilla Firefox, Microsoft Edge, etc., our tool works with all modern browsers.

What Outlook versions are supported?

All. OST files created in any Outlook version are supported for conversion.

Unlimited OST to PST Conversion

Our desktop version offers to:

  1. Convert OST files with no size limits.
  2. Bulk OST to PST conversion supported.
  3. Preview data before conversion.
  4. Save data directly to cloud.
  5. Split output PST file based on size.