OLM Viewer
Open Outlook for Mac OLM archives on Windows or any browser: read emails by folder and save attachments.
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Runs entirely in your browser — nothing is uploaded
How to use the OLM Viewer
- 1
Open your OLM file
Click the box or drag the file onto it. It’s read by your browser — nothing is uploaded.
- 2
Read it instantly
The content appears on the page in a second or two, even for large files.
- 3
Convert if you need to
Use the related converters below to turn the file into PDF, CSV or another format.
Outlook for Windows can’t open OLM exports from Outlook for Mac. This viewer reads them directly: browse folders, search messages and download attachments without importing anything.
Read the full guide with screenshotsFrequently asked questions
Is the OLM Viewer free?
Yes — completely free with no daily limit and no account. ZapMorph’s viewers and developer tools are unmetered.
Is my file uploaded to a server?
No. The file is opened by your browser and displayed on this page. It is never uploaded, stored or logged — close the tab and it’s gone.
Does it work on my phone?
Yes. It works in any modern browser on iPhone, Android, Windows, Mac and Linux, with nothing to install.
How large can the file be?
There is no fixed limit — it depends on your device’s memory. Files of a few hundred megabytes open fine on most computers.
Related converters
OLM to PDF
OLMPDF
Convert Outlook for Mac OLM archives to PDF with sender, recipients, date and message body. Private — nothing is uploaded.
OLM to EML
OLMEML
Convert Outlook for Mac OLM archives to standard EML files that open in Thunderbird, Apple Mail and Outlook.
OLM to MBOX
OLMMBOX
Combine Outlook for Mac OLM archives into one MBOX mailbox for import into Thunderbird, Apple Mail or other clients.
OLM to CSV
OLMCSV
Export Outlook for Mac OLM archives to a CSV spreadsheet — one row per email with date, sender, subject and body.
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MSG Viewer
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PST Viewer
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