What is an EMDF file and how do I open it?

EMDF (eM Client Data File) is a proprietary archive format created by eM Client email application when you export or backup your emails. EMDF files can only be natively opened by eM Client itself. To open EMDF files in other applications or convert them to standard formats, you need the Univik EMDF Converter which extracts emails from the archive and converts them to PST, EML, MSG, PDF or other universal formats.

How do I convert EMDF files to PST or other formats?

To convert EMDF files: 1) Download and install the Univik EMDF Converter, 2) Click 'Add File' and select your .emdf file, 3) The converter parses the archive and displays all emails and folders, 4) Preview emails to verify content, 5) Select your output format (PST, EML, MSG, etc.), 6) Click Convert. The software preserves all attachments, folder structure and email metadata during conversion.

Can I open EMDF files without eM Client installed?

Yes. The Univik EMDF Converter is a standalone application that does not require eM Client to be installed. It directly reads and parses the EMDF archive format, extracts all email content and converts it to your chosen format. This is essential if you've uninstalled eM Client or need to access old EMDF backups on a computer without eM Client.

Why can't I open EMDF files in Outlook or other email clients?

EMDF is a proprietary format exclusive to eM Client. Unlike standard formats like PST, EML or MBOX, EMDF files are not recognized by other email applications including Microsoft Outlook, Mozilla Thunderbird or Apple Mail. To use your eM Client emails in these programs, you must first convert the EMDF file to a compatible format using the EMDF Converter.

What data is preserved when converting EMDF files?

The EMDF Converter preserves all email data including: email body (HTML and plain text), all attachments, sender and recipient information (To, CC, BCC), subject lines, dates and timestamps, folder structure and hierarchy, email headers, read/unread status and inline images. The conversion maintains 100% data integrity.

How do I access old eM Client backups in EMDF format?

Old eM Client backups stored as EMDF files can be accessed using the EMDF Converter even years after creation. Simply load the .emdf file into the converter, preview the contents to verify your emails are intact, then export to your preferred format. This works regardless of which version of eM Client created the backup.

Is EMDF the same as EML format?

No, EMDF and EML are completely different formats. EML is a universal email format where each file contains a single email message and can be opened by most email clients. EMDF is a proprietary eM Client archive format that bundles multiple emails, folders and metadata into a single compressed file that only eM Client can natively read. The EMDF Converter can convert EMDF archives to individual EML files.

Can the converter handle large EMDF backup files?

Yes. The EMDF Converter efficiently handles large archive files containing thousands of emails. It uses optimized parsing to read the EMDF structure, displays progress during conversion and processes emails in batches to maintain system performance. Files several gigabytes in size can be converted without issues.

Univik EMDF Converter

Excellent TrustRating 4.8 | 756 reviews

Convert EMDF files from eM Client

Name: Univik EMDF Converter
Availability: InStock
Rating: 4.8 (756 reviews)
Author: Univik

The only tool you need to open and convert EMDF files exported from eM Client. Extract emails from eM Client backup archives without needing eM Client installed. Convert to universal formats readable by any email application.

Free Download
100% Secure

Buy Now

*Free trial converts first 10 items per folder. Upgrade for unlimited conversion.

Opens EMDF files without eM Client installation
Converts eM Client backup and export archives
Preserves all attachments, folders and metadata
Supports all EMDF versions from any eM Client release

Univik Software Box

Virus Total Safe

Download with Confidence: Certified Clean by 70+ Antivirus Engines

Preserves All Email Data

Emails

Attachments

Folders

Headers

Timestamps

Contacts

Calendar

Simple Process

How to Convert EMDF Files

Converting your eM Client EMDF exports is quick and straightforward. No technical expertise required.

Load EMDF File

Click "Add File" and select your .emdf file. The converter parses the archive and loads all contents, no eM Client needed.

Browse & Preview

Explore the folder tree. Preview any email with full formatting, attachments and headers. Verify content before converting.

Select Format

Choose your output format, PST for Outlook, EML for universal use, PDF for archiving or any of 15+ supported formats.

Convert

Click Convert and watch as your emails are extracted. All attachments, folders and metadata are preserved automatically.

Key Features

EMDF Converter Features

Professional-grade features designed for accurate, fast and reliable EMDF file conversion.

No eM Client Required

Standalone application that directly reads EMDF archives. Open and convert your eM Client exports without having eM Client installed on your system.

Full Email Preview

View complete email content including HTML formatting, inline images and attachments before converting. Verify everything is intact.

All EMDF Versions Supported

Works with EMDF files created by any version of eM Client, from early releases to the latest version. Past, present and future compatible.

Preserves Folder Structure

Your complete folder hierarchy from eM Client, Inbox, Sent, custom folders and subfolders, is maintained exactly in the converted output.

Search & Filter

Find specific emails using powerful search filters. Filter by date range, sender, subject or keywords. Convert only what you need from large archives.

Contacts & Calendar Support

Beyond emails, extract contacts, calendar events, tasks and notes from your EMDF backup. Export to vCard, ICS, CSV and other formats.

Product Preview

See It In Action

Clean, intuitive interface designed for easy EMDF file conversion.

Univik EMDF Converter v25.12

📦 EMDF File Loaded

backup_2025-01-15.emdf

Mail

📥 Inbox 2,456

📤 Sent 1,203

📝 Drafts 45

🗑️ Trash 89

📁 Work Projects 567

👥 Contacts (342)

📅 Calendar (156)

Total: 4,858 items detected

Email Preview

From: [email protected]

To: [email protected]

Subject: Q4 Sales Report - Final Version

Date: Jan 14, 2025 03:45 PM

Hi Team, Please find attached the final Q4 sales report. Key highlights include a 23% increase in revenue...

📎 Q4_Sales_Report.pdf (2.4 MB) 📎 Charts.xlsx (456 KB)

Export Settings

Output Format

Destination

15+ Output Formats

Export to Any Format

Convert EMDF emails to any format you need, email files, documents or cloud services.

Email Formats

PST Outlook Data File
EML Standard Email
MSG Outlook Message
MBOX Unix Mailbox
EMLX Apple Mail

Documents

PDF Portable Document
HTML Web Page
RTF Rich Text
TXT Plain Text
CSV Spreadsheet

Cloud Services

Gmail Google Mail
O365 Office 365
IMAP Any IMAP Server
Yahoo Yahoo Mail
Zoho Zoho Mail

Contacts/Calendar

VCF vCard Contacts
ICS Calendar Events
CSV Contact List
JSON Data Export
XML Structured Data

Pricing Plans

Choose Your License

Flexible pricing options for individuals and businesses. All plans include free updates and technical support.

For Individuals

Personal License

$49 /one-time

Single PC activation
All output formats
Unlimited EMDF conversion
Contacts & calendar export
Free lifetime updates
Cloud upload

Buy Personal

Business License

$99 /one-time

3 PC activations
All output formats
Unlimited EMDF conversion
Contacts & calendar export
Free lifetime updates
Cloud upload (Gmail, O365)
Priority support

Buy Business

For Organizations

Enterprise License

$199 /one-time

Unlimited PC activations
All output formats
Unlimited EMDF conversion
Contacts & calendar export
Free lifetime updates
Cloud upload (Gmail, O365)
Dedicated account manager

Buy Enterprise

30-Day Money-Back Guarantee

Not satisfied? Get a full refund within 30 days. No questions asked. Your purchase is 100% risk-free.

Learn More

The Solution

Why You Need EMDF Converter

Common situations where the EMDF Converter becomes essential for accessing your eM Client emails.

Stopped Using eM Client

Switched to another email client but have old EMDF backups? Without eM Client installed, you can't access those emails.

✓ Solution: Convert EMDF to universal formats

Need Emails in Another App

Want to open eM Client emails in Outlook, Thunderbird or upload to Gmail/Office 365? EMDF won't work directly.

✓ Solution: Convert to PST, EML or MBOX

Archiving & Compliance

Need to archive emails for legal, compliance or long-term storage in a non-proprietary format?

✓ Solution: Convert to PDF or standard formats

View Without Installing

Received an EMDF file but don't want to install eM Client just to view it? Need a quick way to access the contents?

✓ Solution: Open and preview in converter

Old Backups Recovery

Have years-old EMDF backups from a previous computer? Need to recover emails from outdated eM Client versions?

✓ Solution: Supports all EMDF versions

Forensic & Legal Needs

Investigating emails for legal discovery? Need to extract specific messages with full metadata preservation?

✓ Solution: Complete metadata extraction

Complete Preservation

Everything Preserved, Guaranteed

Every email property, attachment and metadata from your EMDF file is maintained during conversion.

Email Content

HTML & Plain Text

Attachments

All file types intact

Folder Structure

Complete hierarchy

Recipients

To/CC/BCC fields

Timestamps

Sent/Received dates

Full Headers

All MIME headers

Read/Unread

Message status

Inline Images

Embedded graphics

Subject Line

Complete text

Message-ID

Unique identifiers

Contacts

Address book entries

Calendar Events

Appointments/meetings

Tasks & Notes

Todo items

Encoding

UTF-8 preserved

All Accounts

Multi-account export

Full Metadata

Every property

Customer Reviews

What Our Customers Say

Trusted by users worldwide for reliable EMDF file conversion.

★★★★★

5.0

"Switched from eM Client to Outlook and this converter was exactly what I needed. Converted 5 years of emails perfectly - all attachments intact, folder structure preserved."

Michael H.

Business Consultant, Seattle

★★★★★

5.0

"Had old EMDF backups from 2018 and couldn't open them anymore. This tool read them perfectly and I recovered all my important emails. Lifesaver!"

Sarah K.

Freelance Writer, Portland

★★★★★

5.0

"Needed to archive client emails in PDF format for legal compliance. The batch conversion feature saved hours of work. Highly professional tool."

Robert J.

Attorney, Chicago

★★★★☆

4.0

"Simple interface, did exactly what I needed. Converted my eM Client backup to EML files so I could import into Thunderbird. Quick and easy process."

Anna L.

Graphic Designer, Austin

★★★★★

5.0

"IT admin here - used this to convert 30+ user EMDF files during our company's email platform transition. Worked flawlessly every time. Enterprise license is great value."

Tom N.

IT Administrator, Boston

★★★★★

5.0

"Didn't want to install eM Client just to view one EMDF file a colleague sent. This converter let me preview and extract what I needed. Perfect solution."

Jennifer P.

Project Manager, Denver

4.8

★★★★★

Average Rating

756

Verified Reviews

25K+

EMDF Files Converted

98%

Customer Satisfaction

Why Choose Univik

Univik vs Other Methods

Compare Univik EMDF Converter with other ways to access EMDF files.

Feature	Univik EMDF Converter	Reinstall eM Client	Manual Extraction
No eM Client Required	✓	✗	✗
Convert to PST/EML/PDF	✓	✗	✗
Preview Before Convert	✓	✗	✗
Batch Processing	✓	✗	✗
Selective Export	✓	Limited	✗
All EMDF Versions	✓	Current only	✗
Export Contacts/Calendar	✓	Separately	✗
Technical Support	✓	✗	✗
Time to Convert 1000 Emails	~2 minutes	N/A	Not possible

Understanding EMDF

What is an EMDF File?

EMDF is a proprietary archive format exclusive to eM Client. Understanding why you need a converter is essential before you begin.

EMDF File Explained

EMDF (eM Client Data File) is the proprietary export and backup format used by eM Client email application. When you use eM Client's "Export" or "Backup" feature, it creates an .emdf file.

📦 What's Inside an EMDF File:

All your email messages (inbox, sent, drafts, etc.)
Complete folder hierarchy and structure
Email attachments (documents, images, etc.)
Contacts and address book entries
Calendar events and appointments
Tasks and notes
Account settings and configurations

⚠️

The Problem: EMDF files can ONLY be opened by eM Client. No other email application, not Outlook, Thunderbird or any other client, can read this proprietary format.

📁 EMDF Archive Structure:

backup_2025-01-15.emdf

├── Mail/

├── Inbox/ (1,234 emails)

├── Sent/ (567 emails)

├── Drafts/ (23 emails)

└── [Custom Folders]/

├── Contacts/

└── contacts.dat

├── Calendar/

└── events.dat

├── Tasks/

└── Settings/

💡 Note: The internal structure is compressed and encoded. You cannot simply rename or extract it like a ZIP file.

Why EMDF Files Can't Be Opened Directly

eM Client uses EMDF as a proprietary format to bundle all user data into a single archive. Unlike standard email formats (EML, PST, MBOX), EMDF uses custom compression and internal structure that:

Cannot be opened by Microsoft Outlook, Thunderbird or any other email client
Cannot be extracted using standard archive tools (7-Zip, WinRAR)
Cannot be imported into cloud services (Gmail, Office 365) directly
Requires eM Client to be installed for native access

Technical Specifications

Product Details

100%

Score Result: Clean

Tested using VirusTotal technology. 100% safe to download and use.

Virus free Spyware free

Product Info

Name:	Univik EMDF Converter
Version:	25.12
Size:	44 MB
License:	Free Trial / Paid

System Requirements

OS:	Windows 11/10/8/7
RAM:	4 GB minimum
Disk:	150 MB free
CPU:	Intel i3 or higher

Compatibility

EMDF Files:	All versions
eM Client:	Not required
Outlook:	Not required
Standalone:	Yes, fully

Free Trial: Converts first 10 items per folder. Upgrade for unlimited conversion.

Frequently Asked Questions

EMDF Converter FAQ

Answers to common questions about opening and converting EMDF files.

EMDF (eM Client Data File) is a proprietary archive format created by eM Client email application. When you use eM Client's "Export" or "Backup" feature, it saves your emails, contacts, calendars and settings into a single .emdf file.

The challenge: EMDF files can only be opened natively by eM Client itself. No other application, Microsoft Outlook, Mozilla Thunderbird, Apple Mail or any standard archive tool, can read EMDF files directly.

The solution: Use the Univik EMDF Converter to open EMDF files without eM Client. The converter parses the proprietary format, displays all contents and converts them to universal formats like PST, EML, MSG or PDF.

Converting EMDF files is straightforward with the Univik EMDF Converter:

Download and install the EMDF Converter (no eM Client needed)
Click "Add File" and select your .emdf file
Wait for parsing, the converter reads the archive and displays all emails and folders
Preview emails to verify content (optional but recommended)
Select output format, choose PST, EML, MSG, MBOX, PDF or other formats
Click Convert, all emails are exported with attachments and folder structure intact

The entire process typically takes just a few minutes, even for large EMDF files with thousands of emails.

Yes, absolutely. The Univik EMDF Converter is a completely standalone application that:

Does NOT require eM Client to be installed
Does NOT require any eM Client license or subscription
Does NOT connect to eM Client servers
Works completely offline after installation

The converter directly reads and parses the EMDF archive format, extracting all email content independently. This is essential for users who have uninstalled eM Client, are using a different computer or simply don't want to install eM Client just to view EMDF files.

EMDF is a proprietary format exclusive to eM Client. Unlike standard email formats, EMDF files use custom compression and internal structures that are not documented or supported by other applications.

Comparison with standard formats:

Format	Can Outlook Open?	Universal?
EMDF	No	No (eM Client only)
PST	Yes	Microsoft standard
EML	Yes	Yes (RFC 5322)
MBOX	With add-in	Yes (Unix standard)

To use your eM Client emails in Outlook, Thunderbird or any other application, you must first convert the EMDF file to a compatible format using the EMDF Converter.

The EMDF Converter maintains 100% data integrity. All of the following are preserved:

Email body (HTML and plain text)
All attachments (any file type)
Sender and recipient fields (To, CC, BCC)
Subject lines
Sent and received dates/times
Complete folder structure
Email headers (full MIME headers)
Read/unread status

Inline/embedded images
Message priority flags
Contacts (name, email, phone, address)
Calendar events and appointments
Tasks and reminders
Notes
Message-ID and references
Character encoding (UTF-8, etc.)

The EMDF Converter supports all versions of EMDF files regardless of when they were created or which version of eM Client produced them:

Old backups: EMDF files from eM Client versions 5, 6, 7, 8 and 9 are all supported
No version matching: You don't need the same eM Client version that created the backup
Archive recovery: Even corrupted or partially damaged EMDF files can often be processed

Simply load your old EMDF backup into the converter, preview the contents to verify your emails are intact and export to your preferred format. This works even if you haven't used eM Client in years.

No, EMDF and EML are completely different formats:

Aspect	EMDF	EML
Full Name	eM Client Data File	Electronic Mail (RFC 5322)
Structure	Compressed archive with multiple emails, contacts, calendar	Single email per file (plain text)
Proprietary?	Yes (eM Client only)	No (open standard)
Can open in Outlook?	No	Yes
Can open in Thunderbird?	No	Yes

The EMDF Converter can extract emails from EMDF archives and save each one as individual EML files, which can then be opened by any email client.

Yes. The EMDF Converter efficiently handles large archive files:

File size: Successfully tested with EMDF files up to 10+ GB
Email count: Can process archives containing tens of thousands of emails
Memory efficient: Uses optimized parsing that doesn't load entire file into memory
Progress tracking: Shows real-time progress for long conversion operations
Batch processing: Processes emails in batches to maintain system performance

For very large archives (100,000+ emails), we recommend the Business or Enterprise license which includes priority processing optimizations and dedicated support.