Free Online OLM to PST Converter
MailsDaddy Online OLM to PST Converter turns Mac Outlook OLM files into Windows-compatible PST format online without a Mac or Outlook for Mac. Free for files up to 200 MB.
- Preserves Mac emails, attachments, and folder trees
- Works on Windows, Linux, and Chromebook without a Mac computer
- Free up to 200 MB per file
At a Glance Specifications
Key operational details, supported formats, system dependencies, and security limits.
OLM in → Unicode PST out
Mac Outlook archive files converted to Windows-compatible PST without requiring a Mac.
200 MB Free · Premium $49
Free for one file up to 200 MB per account. Premium converts files up to 5 GB for $49.
No Outlook or client needed
Runs in your browser on Windows, macOS, Linux and ChromeOS.
Mac Outlook OLM files (.olm) from Outlook for Mac (all editions)
Supports healthy and damaged Mac Outlook OLM files.
TLS 1.3 · Auto-wiped in 2 hours
Files are deleted from servers after 2 hours. Download links expire after 24h (Free) / 48h (Premium).
Outlook 2013–2024 & M365
Standard Unicode PST ready to import or open directly in 32-bit and 64-bit Outlook.
When to Convert OLM to PST Online
Resolve inaccessible OLM data, recover damaged archives, and convert without Microsoft Outlook in minutes.
Mac Outlook to Windows PC Switch
Moving from macOS Outlook to Windows Outlook? Convert your Mac-specific .olm archive into standard Windows .pst files online without requiring a Mac.
Recover Inaccessible Mac OLM Archives
Cannot open an old OLM archive because your Microsoft 365 Mac subscription expired? Access your messages and attachments directly in your browser.
No Mac Computer or Outlook for Mac Required
Perform the conversion on any Windows laptop, Chromebook, or Linux desktop. Bypasses the need for Mac hardware or configuring temporary IMAP accounts.
Corrupted OLM XML Manifest Recovery
Our engine extracts contacts, calendars, recurring meetings, and message trees even when internal Mac XML manifests are truncated or damaged.
Why Convert OLM to PST Without Mac or Outlook?
Mac Outlook stores emails and archives in proprietary OLM format, which Windows Outlook cannot open or import. MailsDaddy Free Online OLM to PST Converter bridges this gap by converting Mac OLM files directly into Windows-compatible Unicode PST files in your web browser without requiring a Mac computer or Outlook for Mac.
No Mac Computer Required
Convert Mac Outlook OLM archives into Windows-compatible PST format directly on Windows, Linux, or Chromebook.
No Outlook for Mac Needed
Access your Mac Outlook archives without needing an active Microsoft 365 for Mac subscription.
Cross-Platform Migration
Transition your email archives from macOS to standard Windows Outlook in three simple steps.
How We Handle Corrupted & Incomplete OLM Archives
Mac Outlook OLM files contain internal XML manifests and MIME structures. When an export is interrupted by a Mac crash or system sleep, the manifest can become damaged, rendering the archive unreadable by standard import utilities. The converter reads the archive structure to recover readable data.
XML Manifest Repair & Rebuild
Parses internal XML indexing structures to recover readable mail folders and items.
Calendar & Contact Extraction
Recovers recurring events, meeting appointments, attendee status, and address book metadata.
Standard PST Output
Extracts inline attachments, documents, and nested subfolders into a Windows Unicode PST file.
How to convert OLM to PST online
The whole conversion process is designed so you can complete it in minutes without installing software.
Upload your Mac OLM file
Select your .olm file or drag it into the upload box. Files up to 200 MB are free.
Convert to PST
The cloud converter decodes the Mac OLM archive and builds a Windows-compatible Outlook Unicode PST.
Download the PST
Download the PST from the result screen. It stays available for 24 hours on the free plan and 48 hours with Premium.
How to Import Converted OLM PST into Microsoft Outlook
Compatible with Microsoft Outlook 365, 2024, 2021, 2019, 2016, and 2013 on Windows.
Open Outlook on Windows
Start Microsoft Outlook (Microsoft 365, 2024, 2021, 2019, 2016, or 2013) on your computer.
Select Open Outlook Data File
In the top menu bar, click File > Open & Export > Open Outlook Data File (.pst).
Access Restored OLM Folders
Browse and select the downloaded PST file. Your folders, emails, headers, and attachments will appear in the navigation pane.
What is converted
Your folders, emails, attachments, contacts, calendars, tasks and notes are carried over into an Outlook PST.
Folder structure preserved
All folders and subfolders are mirrored in the output PST with clean directory trees.
Emails & message attributes
Retains full HTML/RTF styling, inline images, To, From, CC, BCC, Subject headers, and message flags.
Attachments & documents
Attachments and inline images stay with their original messages, including PDFs, Office docs, spreadsheets, and ZIP files.
Contacts & address books
Contact profiles, display names, email addresses, phone numbers, and notes are preserved in the PST.
Calendars & meeting schedules
Preserves appointments, recurring schedules, attendee invitations, locations, and reminder notifications.
Tasks, reminders & notes
Migrates to-do tasks, priorities, due dates, reminder alarms, and sticky memo notes into your new Outlook PST.
Start free. Upgrade when you need everything.
The free tier is enough to confirm your mailbox opens correctly before you commit.
- File size up to 200 MB
- Convert single file for Free
- Free account required, one file per account
- Free Conversion available for 24 hours to download
Premium
Secure Online Transaction via PayPro Global
- File Size limit is upto 5 GB
- Convert Single File at $29
- Converted file available for 48 hours to download
Personal Edition
Local desktop processing • No size limit. Batch conversion and local PC processing ($49). Licence for up to 2 PCs
- No file size limit
- Batch conversion of unlimited files at $49
- Licence for up to 2 PCs • Offline PC processing
- Converted File on system for unlimited period
Online OLM Converter vs Desktop Edition
Compare the free online web app against desktop software and manual export.
| Feature | Online OLM ConverterCurrent | Desktop Edition | Manual Method |
|---|---|---|---|
| Cost & Access | Free ($0) up to 200 MB Upgrade available for large files up to 5 GB | Lifetime License ($49) Licence for up to 2 PCs, unlimited usage | Free, needs Outlook or source client Needs a mail account or server |
| Software Needed | Zero Installation Runs in your browser (no Outlook) | Windows Desktop App Offline processing on your PC | Multiple Desktop Apps Requires Outlook + source client |
| Max Mailbox Size | 200 MB (Free) / 5 GB (Premium) Fast cloud conversion pipeline | No File Size Limit Tested on large archives | Depends on your email client May fail on large mailboxes |
| Batch Processing | Single File Pipeline Converts 1 file at a time | Simultaneous Batch Mode Batch conversion of multiple files | Manual Export / Sync Drag & drop folder by folder |
| Damaged Archives | Automated Cloud Repair Recovers readable items & headers | Advanced Deep Scan Offline processing on your PC | May fail on damaged files Clients abort on broken records |
| Operating System | Any OS (Browser-Based) Windows, macOS, Linux, ChromeOS | Windows Only Windows 11, 10, 8, 7 & Server | OS Restricted Limited to client OS support |
| Privacy & Retention | TLS 1.3 · Auto-Wiped in 2h PST link active 24h (Free) / 48h (Paid) | Completely Offline Processing Data never leaves your computer | Syncs to Mail Server Best for small, healthy mailboxes |
| Recommendation: | Convert Online Free | Get Desktop ($49) | High risk of corruption & Outlook crashes |
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Frequently Asked Questions
Clear, detailed answers about OLM conversion, Outlook compatibility, and data privacy.
Get your mailbox back today.
Upload your OLM file and download an Outlook PST in a few clicks.