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PCVITA software to convert Outlook OST files to MBOX format
OST to MBOX Converter
PCVITA OST to MBOX Converter converts OST files from every Outlook version to MBOX format with attachments, metadata and folder structure intact. OST to MBOX software reads healthy and damaged OST files without an Exchange Server connection. Thunderbird, Apple Mail, Eudora, Netscape Mail, PocoMail, Entourage and The Bat open the MBOX output. Free demo previews every item and exports 25 items from every folder.
- Input
- Healthy and damaged OST files, ANSI and Unicode
- Output
- MBOX file, plus 13 other formats
- Converts
- Emails, contacts, calendars, tasks and attachments
- Filters
- Date range and selected items
Scans the OST file first and shows folders in a tree before any MBOX file is saved. See all features. For PST output open the OST to PST Converter and for 14 formats from one scan open the OST Converter.
How OST to MBOX Conversion Moves Your Mailbox Data
Your OST file goes in on one side. An MBOX file with the same folders, emails and attachments comes out on the other.
Outlook OST File
Any Outlook version, ANSI or Unicode
- Corrupt, damaged or inaccessible OST files
- OST files of any size
- Files found by a drive search
PCVITA OST to MBOX Converter
Works on your Windows machine
- Quick scan or Advance scan
- Preview of every item
- Date range filter for selected mail
MBOX File
Opens in Thunderbird, Apple Mail and other MBOX clients
- Folder hierarchy kept
- Attachments in original form
- Email metadata unchanged
- 1AddPoint to your OST file or let a drive search find it.
- 2ScanChoose Quick or Advance mode and preview the items.
- 3ExportSelect MBOX and save every item or only the ticked ones.
Convert OST to MBOX in 6 Steps
Six screens take you from the first click to a saved MBOX file. Select a step to see its screen or read the full walkthrough in the OST to MBOX Converter Software Guide.
Step 1. Add the OST File
Download and install PCVITA OST to MBOX Converter, then open it. Click Add File to load the OST file you want in MBOX format.
Step 2. Select or Search the OST File
Choose Select File and browse to the OST file. Choose Search File to search a selected drive or all drives. The software lists every OST and BAK file it finds after the search completes.
Step 3. Choose Quick or Advance Scan
Select Quick scan for a healthy or lightly damaged OST file. Select Advance scan for a highly corrupted file. Click Add and wait while the software scans the file.
Step 4. Preview the OST Items
Save the scan report when the dialog asks. Folders with data appear in bold on the left. Open an email in Normal, Hex, Properties, Message Header, MIME, HTML, RTF or Attachments view. Tabs for Calendar, Contacts, Tasks, Notes and Journal sit above the list.
Step 5. Export to MBOX
Click Export to convert everything or Export Selected for the items you ticked. Select MBOX in the format list, set a date range if you need one and choose the destination folder.
Step 6. Check the Export Report
Read the export summary when the conversion completes. Export details land in a CSV report. Open the destination folder and import the MBOX file into your mail client.
Free demo, no licence needed to preview every item and convert 25 from every folder.
OST to MBOX Conversion Features
What PCVITA OST to MBOX Converter does with your OST file, grouped by task.
Converts Every OST Item to MBOX
OST files load in one step and the folder structure comes through to the MBOX file.
Export All OST Data Items
Inbox, Sent Items, Drafts, Public folder and the other mailbox folders convert to MBOX. Calendars, contacts and tasks come with them.
Attachments in Original Form
Email attachments export to the MBOX file in their original format.
Folder Hierarchy Kept
Folders in the MBOX file follow the same tree as the OST file.
No File Size Limit
OST files of any size convert. A large file needs more time.
Search a Drive for OST Files
Search Selected Drive or Search All Drives lists the OST and BAK files on the machine so you can add them in one go.
Opens Damaged and Encrypted OST Files
Corrupt, inaccessible and locked OST files convert like healthy ones.
Corrupt and Damaged OST Files
Advance scan reads a highly corrupted OST file. 64 bit Windows is supported.
ANSI and Unicode OST Files
OST files of both formats convert to MBOX without extra settings.
All Outlook Versions
OST files created in Outlook 2019, 2016, 2013 and lower versions convert.
S/MIME and OpenPGP Encryption
Provide your S/MIME certificate or OpenPGP keys and the software strips encryption from the OST emails.
No Exchange Server Needed
Conversion works from the OST file alone, so no Exchange Server connection is required.
Previews Items Before Conversion
Check the scanned OST file on screen and decide what goes to MBOX.
8 Preview Views for Emails
Normal Mail, Hex, Properties, Message Header, MIME, HTML, RTF and Attachments views open any email in full.
Tabs for Every Item Type
Seven tabs split the scan by type, from Mail and Calendar to Journal and Folder List.
Deleted Items in Red
Deleted items found by the scan show in red in the preview panel.
Save the Scan Report
Keep the scan report and reload it later without scanning again.
Selective Export to Your Chosen Location
Convert the full mailbox or only the emails you need.
Export Selected Items
Tick emails in the preview panel and click Export Selected. Only those emails go into the MBOX file.
Date Range Filter
Set a date range and export OST items from that period only.
Destination of Your Choice
Save the MBOX file to any folder, network location or external drive. Create a new folder there if you need one.
Naming Convention and Report
Apply a naming convention to saved files and read the export report in CSV format.
PCVITA tool also saves OST data as PST, MSG, EML, HTML, PDF, vCard, EMLX, NSF, TXT, ICS, MHT, Documents and CSV files.
See these options on your own file. Free demo converts the first 25 items in a folder.
Why Outlook OST Files Need MBOX Conversion for Other Mail Clients
Four Microsoft facts explain why an OST file stays locked to Outlook. PCVITA software answers all four.
- 1
OST Is an Offline Copy for Outlook
Microsoft calls the OST file the Offline Outlook Data file, used with Cached Exchange Mode. PCVITA tool reads that offline copy directly and saves the items as MBOX.
- 2
Shared Folders Grow the File
Microsoft notes that Outlook stores downloaded shared folders in the local OST file and that the file can grow significantly. PCVITA tool has no file size limit, so a large OST file still converts.
- 3
ANSI Files Stop at 2 GB
Microsoft states that an ANSI OST or PST file is limited to 2 GB to prevent corruption. PCVITA software reads both ANSI and Unicode OST files.
- 4
Microsoft Names PST as the Export File
Microsoft Support describes PST as the file Outlook exports mail to and lists no MBOX option there. MBOX is the format Thunderbird, Apple Mail and other clients open, so PCVITA converts the OST file to MBOX.
Prepare Before You Convert Your OST File
Six checks before the first conversion. Tick them off, then open the software.
- Copy the OST file to a safe folder so the original stays untouched while you test the conversion.
- Check your Windows machine. Windows 10, 8.1, 8, 7, Vista and the server editions listed in Specifications work with 512 MB RAM (1 GB is recommended) and a 1 GHz processor (2.4 GHz is recommended).
- Locate the OST file or plan to use Search File, which lists OST and BAK files on a selected drive or all drives.
- Collect the S/MIME certificate or OpenPGP keys if the OST emails are encrypted.
- Install the mail client that opens MBOX, for example Thunderbird, so you can check the converted emails.
- Test the free demo on your file before you buy. Download the OST to MBOX Converter demo, preview every item and convert 25 from every folder.
System lines match the Specifications table below.
OST to MBOX Converter Pricing
Free demo first, then one licence. Both editions share every option and only the item count differs.
Demo Edition
Free
Preview every item, convert 25 from every folder
- Export limit25 items per folder
- FeaturesAll
- LicenceNot needed
Version 8.0, 36.3 MB, Windows
Full Edition
$49 one licence
Convert every item from every OST file you load
- Export limitNone
- FeaturesAll
- DeliveryEmail after payment
30 Days Money Back*, Safe & Secure checkout
Included in both editions The demo and the full edition share every option, only the item count differs
- Add Several OST Files at Once
- Preview Panel for All OST Items
- Emails With Attachments in Preview
- Naming Convention for Saved Files
- Folder Hierarchy Kept
- Date Range Filter
- OST to MBOX Conversion
- 13 More Output Formats
OST to MBOX Converter Specifications
Version, system needs and conversion limits in one place.
| Version | 8.0 |
|---|---|
| File size | 36.3 MB |
| Windows versions | Windows 2000, 2003, 2008, Vista, 7, 8, 8.1, 2012 and 10 (32 bit and 64 bit) |
| Hardware | 1 GHz processor (2.4 GHz recommended), 512 MB RAM (1 GB recommended), 5 MB free hard disk space |
| Free demo limit | Full preview, 25 items a folder exported |
| Delivery | Email after payment confirmation |
| Input files | OST files, healthy or damaged, ANSI and Unicode, of any size |
|---|---|
| Outlook versions | OST files from Outlook 2019, 2016, 2013 and lower versions |
| Items converted | Emails with attachments, calendars, contacts, tasks, notes and journals |
| Scan modes | Quick scan and Advance scan (64 bit Windows supported) |
| Output | MBOX file, plus 13 other formats from the same scan |
| MBOX clients | Thunderbird, Eudora, Netscape Mail, PocoMail, Entourage, The Bat and Apple Mail |
| Exchange Server | Connection not needed |
OST to MBOX Converter vs Outlook Export
What Microsoft documents for Outlook data files next to what PCVITA tool does, so you can decide which route fits your OST file.
| Point | Outlook (Microsoft pages) | PCVITA Tool |
|---|---|---|
| Export file type | PST is the export file named | MBOX, plus 13 other formats |
| OST source | Offline copy used with Cached Exchange Mode | Reads the OST file directly, no Exchange Server needed |
| Damaged OST file | Not covered on these pages | Quick and Advance scan read corrupt and damaged files |
| File size | ANSI files stop at 2 GB | No file size limit |
| Selected items | Not covered on these pages | Preview, tick items and set a date range |
| Metadata | Not covered on these pages | Email metadata stays as it is |
Outlook facts come from Introduction to Outlook Data Files (Microsoft Support) and Configure the size limit for Outlook data files (Microsoft Learn). Tool facts come from the Specifications and Features sections above.
Sources for OST File Facts Microsoft pages behind the statements on this page
- Microsoft SupportIntroduction to Outlook Data Files (.pst and .ost)
- Microsoft LearnHow to configure the size limit for both (.pst) and (.ost) files in Outlook
OST to MBOX Converter FAQs
Answers on how conversion works, what the demo covers and which clients open the MBOX file.
Working and limits How the software behaves during the conversion
How do I convert OST to MBOX with PCVITA OST to MBOX Converter?
Six steps convert an OST file to MBOX.
- Step 1. Download and install the software, then click Add File.
- Step 2. Browse to the OST file or search a drive for it.
- Step 3. Choose Quick or Advance scan.
- Step 4. Preview the scanned folders and emails.
- Step 5. Click Export and select MBOX as the format.
- Step 6. Read the export report and open the MBOX file.
Can I convert only selected emails from an OST file to MBOX?
Yes. Preview the items, tick the emails you need and click Export Selected. Only those emails go into the MBOX file. Date range filters narrow the export further.
Will the metadata of my Outlook emails change after conversion?
No. All metadata of the OST emails stays as it is after the conversion to MBOX.
Can I save the MBOX file in a new folder?
Yes. Choose any destination, including a network location or an external drive. Create a new folder there to hold the MBOX file.
How long does OST to MBOX conversion take?
Conversion time depends on the size of the OST file. Large files take more time than small ones and Advance scan on a damaged file adds scan time.
Is there a size limit for the OST file?
No. PCVITA software converts every email and attachment from an OST file of any size. Large files need more time.
Can I convert a corrupt or damaged OST file to MBOX?
Yes. Load the file and select Advance scan for a highly corrupted OST file. PCVITA software scans it, shows the recovered folders and converts them to MBOX.
Does the MBOX file keep my email attachments?
Yes. Attachments export to the MBOX file in their original form. Preview an email with its attachments before you convert it.
Demo and price What the demo covers and what a licence costs
What does the free demo of the OST to MBOX Converter do?
Everything except a full export. Demo edition adds OST files, scans them, previews every item and converts 25 items from every folder to MBOX.
How much does the full edition cost?
$49. Full edition lifts the 25 item folder limit and carries a 30 day money back guarantee. Payment confirmation sends your activation key by email.
Compatibility and clients Mail clients, OST formats, Outlook and Windows versions
Can I view OST file attachments in Thunderbird?
Yes. Convert the OST file to MBOX with PCVITA software, import the MBOX file into Thunderbird and open the Outlook email attachments there.
Which email clients open the converted MBOX file?
Thunderbird, Eudora, Netscape Mail, PocoMail, Entourage and The Bat. Apple Mail on a Mac opens the MBOX file too. For a direct Apple Mail route see the OST to Apple Mail Converter.
Does the software support Unicode and ANSI OST files?
Yes. PCVITA tool supports both ANSI and Unicode OST files.
Which Outlook and Windows versions does the converter support?
OST files from Outlook 2019, 2016, 2013 and lower versions. PCVITA software installs on Windows 2000, 2003, 2008, Vista, 7, 8, 8.1, 2012 and 10 in 32 bit and 64 bit editions.
Do I need an Exchange Server connection to convert an OST file?
No. PCVITA software works from the OST file alone and needs no connection to Microsoft Exchange Server.
Question not answered here? Ask on Live Chat or write to us from the Contact Us page.
OST to MBOX Converter Reviews
Ratings collected on pcvita.com and what customers wrote after their OST to MBOX conversion.
I had an OST file of around 30 GB and I had to convert .ost file to MBOX files. But sadly, most of the applications failed to convert my file. Then I came to know about OST to MBOX Converter. I had no trouble migrating my file when I used this program. I highly recommend this converter tool.
As a part of an assignment, I was supposed to open an OST file in Thunderbird. We all know that Thunderbird does not support OST file and requires MBOX to open and read. Thus, the necessity to convert OST file to MBOX arose. OST to MBOX software turned out to be the best application that is capable of performing this file conversion. It solved my problem and now I can access all OST emails in Thunderbird.
It was an absolute necessity to turn OST files into MBOX format. I was looking for a tool that can perform this conversion along with email attachment conversion. One of my friends referred me this application. It successfully transferred all OST attachments into MBOX format. There is also a demo version of this software that users can try before purchasing the license.
GearDownload: 100% clean badge, no spyware, adware or viruses found in PCVITA software.
DownloadAtoZ: 5 star award badge for PCVITA software. See every badge on the PCVITA awards page.
Key Takeaways on OST to MBOX Conversion
The short version of this page.
- Files and versions: converts healthy and damaged OST files from Outlook 2019, 2016, 2013 and lower, ANSI or Unicode, at any size.
- Two scan modes: Quick scan for light cases, Advance scan for a highly corrupted file.
- Preview and filter: 8 email views, tick selected items and set a date range before the MBOX export.
- MBOX output: attachments, metadata and folder hierarchy stay the same and the file opens in Thunderbird, Apple Mail and other clients.
- Demo and price: the free demo converts 25 items per folder and the full edition costs $49 with 30 days money back.
Test the OST to MBOX Converter on Your Own File
Download the free demo, scan the OST file, preview every item and convert the first 25 in a folder before you buy the full edition.
Safe & Secure · 30 Days Money Back*