100% Private & Secure

Free OLM Viewer
Read Outlook Mac Archives

Drop an .olm file to browse emails exported from Outlook for Mac. View subjects, senders, dates, and full message bodies — all privately on your device.

View Outlook Mac emailsParse OLM archivesSearch emailsNo upload required

Drop your .olm file here

or click to browse

About

What Is an OLM File?

OLM is the archive format used by Microsoft Outlook for Mac. When you export your mailbox from Outlook on macOS, the result is an .olm file — a ZIP archive containing XML files for each email message, along with contacts, calendar events, and other mailbox data organized in a folder hierarchy.

Each email message is stored as an individual XML file with tags like OPFMessageCopySubject, OPFMessageCopySenderAddress, OPFMessageCopyBody, and OPFMessageCopyHTMLBody. Our free OLM Viewer parses these XML files and presents emails in an easy-to-browse split-pane interface.

Use the viewer to preview an OLM export before migrating to another platform, to verify backups, or to read archived emails without having Outlook installed. Your data stays private on your device at all times.

Features

Features of the OLM Viewer

Browse Outlook for Mac archives with a split-pane email reader

OLM Email Parsing

Extracts emails from OLM ZIP archives by parsing the embedded XML files for subjects, senders, recipients, dates, and bodies.

Split-Pane View

Email list on the left with sender avatar, subject, and preview; full message details and body on the right.

Email Search

Search across subjects, senders, recipients, body text, and folder names to quickly find the email you need.

Folder Detection

Derives the folder name from each email's path inside the OLM archive so you can see where messages were stored.

No Upload

OLM files are processed entirely on your device. Nothing is sent to any server.

Private & Secure

Your email data never leaves your device. Ideal for personal or work Outlook for Mac archives.

How to use

How to View an OLM File Online

Four simple steps — no install, no sign-up

01
01

Open the OLM Viewer

Go to the OLM Viewer page and you'll see the upload area ready for your file.

02
02

Drop Your .olm File

Drag and drop your .olm file exported from Outlook for Mac, or click to browse and select one.

03
03

View Email Count

The tool parses all XML email files inside the OLM archive and shows how many emails were found.

04
04

Browse & Search Emails

Click any email in the list to read the full message. Use search to filter by subject, sender, or folder.

Use cases

Use Cases for the OLM Viewer

When and why to open OLM files online

Outlook Mac Migration

Preview emails exported from Outlook for Mac before migrating to another email client or platform.

Backup Verification

Verify that an OLM backup contains the expected emails, folders, and message content.

Cross-Platform Access

View Outlook for Mac archives on any device — Windows, Linux, or mobile — without Outlook installed.

Privacy-Conscious Viewing

View archived emails on a shared or public machine without installing Outlook or uploading data.

Email Archive Audit

Audit OLM archives for compliance, legal discovery, or record-keeping purposes.

Development & QA

Inspect OLM export output from scripts or tools during development and testing workflows.

Compare Plans

Free vs Paid — OLM Viewer

Get started free, upgrade when you need more power.

Feature
Free
Paid
Daily usage
5 uses/day
Unlimited
File size limit
10 MB
Up to 500 MB
All core features
No software installation
Works on any device
Files stay on your device
Batch processing
Priority support
Upgrade — starting at $6.99/mo
Upgrade to Full Version

Unlock the Full Power of OLM Viewer

Remove daily limits, process larger files up to 500 MB, enable batch processing, and get priority support.

Buy Full Version — $6.99/moor $300 enterprise

File Viewers includes:

  • 21 file viewers included
  • Unlimited daily uses
  • 100 MB file size limit
  • All file formats supported
  • Email analysis tools

Also available in the All Tools Bundle

FAQ

Frequently Asked Questions

Common questions about the OLM Viewer

Q1. What is an OLM file?
OLM (Outlook for Mac) is an archive format used by Microsoft Outlook on macOS. It is essentially a ZIP file containing XML files that represent emails, contacts, calendar events, and other mailbox data. Each email is stored as an individual XML file within a folder hierarchy.
Q2. Do you upload my OLM file?
No. The OLM Viewer processes your file entirely on your device using JavaScript. Your data is never sent to our servers — it stays completely private.
Q3. How does the viewer parse OLM files?
OLM files are ZIP archives. The viewer unzips the archive in the browser using JSZip, finds all XML files, and parses them using the browser's built-in DOMParser. It extracts email fields like subject, sender, recipient, date, and body from standard OLM XML tags.
Q4. Can I search through the emails?
Yes. There is a search input above the email list that filters by subject, sender, recipient, body text, and folder name in real time.
Q5. What if the viewer finds no emails?
If no emails are found in the standard OLM XML format, the viewer shows a listing of all files inside the ZIP archive as a fallback, so you can see the structure of the OLM file.
Q6. Does it show HTML email bodies?
Yes. If an email contains an HTML body, it is rendered in a sandboxed iframe for safe viewing. Plain-text bodies are displayed as preformatted text.
Q7. Does it work on mobile?
Yes. You can open the OLM Viewer on a phone or tablet, tap the upload area, and select an .olm file from your device to browse all emails.
Q8. Is the OLM Viewer free?
Yes. The tool is free to use with no sign-up and no limits on file size or number of emails.
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