What is an EML file and why do I need to convert it?

EML (Electronic Mail) is a standard email file format that stores individual email messages including headers, body content and attachments. Each EML file contains exactly one email. You need to convert EML files when migrating to Outlook (PST format), consolidating thousands of individual emails into a single archive, creating PDF copies for legal compliance, or accessing emails without the original email client.

Which email clients create EML files?

EML format is created by Windows Mail, Windows Live Mail, Microsoft Outlook Express, Mozilla Thunderbird, Apple Mail (when exporting), eM Client, Postbox and many other email applications. It's also the standard format for email exports and forensic email acquisition.

Can I convert multiple EML files to a single PST?

Yes, Univik EML Converter can batch convert thousands of EML files into a single consolidated Outlook PST file. The folder structure is preserved and you can organize emails into custom folders during the conversion process.

Does the converter preserve email attachments and formatting?

Yes, all email components are fully preserved: attachments (documents, images, archives), HTML formatting, inline images, email headers and metadata. The converted emails appear exactly as the originals.

Univik EML File Converter

Excellent TrustRating 4.9 (342 reviews)

Convert EML files in Batch

Univik EML Converter is professional Windows software to convert individual EML email files from Windows Mail, Outlook Express, Thunderbird and other email clients into 15+ formats. Consolidate thousands of scattered .eml files into organized archives with complete attachment preservation.

Free Download
100% Safe & Secure

Buy Now - $39

*Free trial exports first 25 EML files. Full version for unlimited conversion.

Batch EML Processing: Convert thousands of individual .eml files at once. Load entire folders recursively and process all emails in a single operation.
Consolidate to Single Archive: Merge scattered EML files into one PST, MBOX, or PDF archive. Perfect for organizing legacy email collections.
Complete Data Preservation: All email headers, body content (HTML/plain text), attachments, inline images and MIME structure preserved exactly.
100% Offline & Secure: Desktop software processes emails locally - your sensitive communications never leave your computer.

Univik EML Converter Box

VirusTotal Verified Safe

Certified Clean by 70+ Antivirus Engines. No malware, spyware, or adware.

EML Sources Supported

Windows Mail

Outlook Express

Thunderbird

Windows Live Mail

eM Client

Apple Mail

Postbox

Mailbird

Export Options

15+ Output Formats

Convert your EML files into formats compatible with Outlook, email clients, document archives and cloud services.

Available Export Formats

Outlook Formats

PST, MSG, OST

Consolidate thousands of EML files into a single PST for easy Outlook import. Each EML becomes one message.

Email Archives

MBOX, EMLX, MHT

Convert EML to MBOX for Thunderbird, EMLX for Apple Mail, or MHT for web archives.

Document Formats

PDF, HTML, RTF, TXT

Create searchable PDF archives for legal compliance, or HTML for web-based viewing.

Cloud Services

Gmail, Office 365, IMAP

Upload converted emails directly to cloud services for access from any device.

Key Features

Why Choose Univik EML Converter

Professional-grade software designed specifically for handling individual EML files at scale.

Batch Processing Engine

Process thousands of EML files simultaneously. Load entire folder trees recursively - the software finds all .eml files automatically, even in deeply nested subdirectories.

Consolidation Mode

Merge thousands of scattered EML files into a single organized archive. Create one PST from 10,000+ individual emails while preserving folder structure based on source directories.

Complete Attachment Preservation

All embedded attachments preserved: documents, images, spreadsheets, archives. Option to extract attachments separately or keep them embedded in converted emails.

Smart Folder Mapping

Automatically creates folder structure in output based on source directory hierarchy. EML files from "Inbox" folder appear in "Inbox" in the PST. Custom mapping rules available.

Advanced Filtering

Filter EML files by date range, sender, recipient, subject keywords, file size, or attachment presence. Convert only the emails you need from large collections.

Email Header Integrity

Complete RFC 822 header preservation: From, To, CC, BCC, Date, Subject, Message-ID, References, X-headers and all routing information. Essential for forensics and legal compliance.

Corrupted EML Recovery

Advanced recovery mode extracts readable content from damaged EML files. Handles encoding errors, truncated messages, missing headers and malformed MIME boundaries.

Full Unicode Support

Perfect handling of international characters: UTF-8, UTF-16, ISO-8859, Windows codepages. Chinese, Japanese, Korean, Arabic, Hebrew, Cyrillic - all preserved correctly.

Format Comparison

EML vs Other Email Formats

Understanding the differences between email file formats helps you choose the right conversion path for your needs.

EML

Electronic Mail

Universal Format

✅ One email per file
✅ Plain text, human-readable
✅ Cross-platform compatible
✅ RFC 5322 standard
❌ Thousands of scattered files

MSG

Outlook Message

Microsoft Proprietary

✅ One email per file
✅ Rich Outlook metadata
✅ Native Outlook support
❌ Proprietary binary format
❌ Requires Outlook or converter

PST

Personal Storage Table

Outlook Archive

✅ Single archive file
✅ Contains all emails + folders
✅ Easy Outlook import
❌ Large files prone to corruption
❌ 50GB size limit (older versions)

MBOX

Unix Mailbox

Unix/Linux Standard

✅ Single archive file
✅ Plain text format
✅ Thunderbird native
❌ No random access to emails
❌ Corruption affects entire file

EMLX

Apple Mail Message

macOS Only

✅ One email per file
✅ Apple Mail native
✅ Similar to EML structure
❌ macOS only format
❌ Extra metadata plist

PDF

Portable Document

Archive Format

✅ Universal viewing
✅ Preserves visual layout
✅ Legal admissibility
❌ Not re-importable to email
❌ Attachments embedded only

Complete Format Comparison

Feature	EML	MSG	PST	MBOX	PDF
Structure	One file per email	One file per email	Single archive	Single archive	One file per email
Format Type	Open Standard	Proprietary	Proprietary	Open Standard	Open Standard
Human Readable	✅ Yes (plain text)	❌ No (binary)	❌ No (binary)	✅ Yes (plain text)	✅ Yes (visual)
Cross-Platform	✅ All platforms	⚠️ Windows mainly	⚠️ Windows mainly	✅ All platforms	✅ All platforms
Outlook Compatible	⚠️ Via import	✅ Native	✅ Native	⚠️ Via import	❌ View only
Thunderbird Compatible	✅ Native	⚠️ Via addon	⚠️ Via import	✅ Native	❌ View only
Attachments	✅ Embedded (Base64)	✅ Embedded	✅ Embedded	✅ Embedded (Base64)	⚠️ Embedded/Flattened
Legal Discovery	✅ Excellent	✅ Good	⚠️ Needs extraction	⚠️ Needs extraction	✅ Excellent
Best Use Case	Universal exchange	Outlook workflow	Outlook archival	Unix/Thunderbird	Permanent archive

💡 Recommendation: EML is the most universal intermediate format. Convert your emails to EML first, then convert to your target format (PST for Outlook, PDF for legal, MBOX for Thunderbird).

Migration Paths

Email Format Conversion Flowchart

Visual guide showing all supported conversion paths. EML is the universal intermediate format for cross-platform migration.

Popular Migration Scenarios

Windows Mail → Outlook

EML → PST conversion

Thunderbird → Outlook

Export EML → PST

EML → PDF Archive

Legal compliance

Gmail → Outlook

Takeout MBOX → EML → PST

Estimated Conversion Times

~30s

100 EML files

~5min

1,000 EML files

~45min

10,000 EML files

*Times vary based on email size, attachments and system specs

The EML Problem

Why EML Files Are Problematic

Unlike other email formats, EML creates one file per email - leading to unique challenges that require specialized solutions.

Scattered File Problem

Pain Point: Thousands of Individual Files

Unlike MBOX or PST which store multiple emails in one file, EML creates separate files for each email. A 5-year email archive can have 50,000+ individual .eml files scattered across folders - impossible to manage or search efficiently.

Orphaned Email Archives

Pain Point: Windows Mail/Outlook Express Discontinued

Microsoft discontinued Windows Mail and Outlook Express, leaving millions of users with EML archives they can't access. Modern Outlook doesn't directly import EML files - conversion to PST is required.

Email Client Migration

Pain Point: No Direct Import Path

Moving from one email client to another often requires format conversion. Thunderbird exports EML but Outlook needs PST. Gmail Takeout creates MBOX which some clients can't read. EML is the universal intermediate format.

Search & Discovery Issues

Pain Point: Can't Search Across Files

Windows Search struggles with thousands of EML files. Finding a specific email means manually opening files one by one. Converting to PST enables Outlook's powerful search across all emails.

Legal & Compliance Requirements

Pain Point: eDiscovery & Audit Trails

Legal teams need email evidence in specific formats. Courts accept PDF with preserved headers. eDiscovery platforms require individual EML or MSG files. Compliance audits need searchable archives.

Long-Term Archival

Pain Point: Future-Proof Storage

EML is plain text and future-proof, but unmanageable at scale. Converting to PDF creates permanent records. Converting to PST enables import into future Outlook versions.

EML Technical Guide

Anatomy of an EML File

Understanding EML file structure helps you make informed conversion decisions. Here's what's inside every EML file.

EML File Structure

EML (Electronic Mail) files follow RFC 5322 (Internet Message Format) specification. Each file is a plain text document containing:

Email Headers: From, To, CC, BCC, Date, Subject, Message-ID, Content-Type, MIME-Version and custom X-headers.
MIME Boundaries: Separators that define different parts of multipart messages (text, HTML, attachments).
Body Content: Plain text and/or HTML version of the email message.
Attachments: Base64-encoded binary data for documents, images and other files.

Why EML is Universal

EML is the most compatible email format because:

Plain Text: Can be opened in any text editor for inspection.
Standard Format: Follows internet email standards (RFC 5322, RFC 2045-2049).
Self-Contained: Each file contains everything needed to display the email.
Cross-Platform: Works on Windows, macOS, Linux without modification.

Univik EML Converter fully parses and preserves all EML components during conversion.

Sample EML Header Structure

From: [email protected]
To: [email protected]
Subject: Important Business Document
Date: Mon, 20 Jan 2025 10:30:00 -0500
Message-ID: <[email protected]>
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="----=_Part_123"

------=_Part_123
Content-Type: text/html; charset="UTF-8"

<html><body>Email content here...</body></html>

------=_Part_123
Content-Type: application/pdf; name="document.pdf"
Content-Disposition: attachment; filename="document.pdf"
Content-Transfer-Encoding: base64

JVBERi0xLjQKJeLjz9MKMSAwIG9iago8PC9UeXBlL0NhdGFsb2cvUGFn...

Conversion Scenarios

Common EML Conversion Workflows

Real-world scenarios where EML conversion solves specific problems.

Scenario 1 Windows Mail to Outlook Migration

Problem: 15,000 EML files from discontinued Windows Mail need to be imported into Microsoft Outlook 365.

Solution: Use Univik EML Converter to batch convert all EML files to a single PST file. Import the PST into Outlook with File → Open → Import.

Time Saved: ~40 hours of manual drag-and-drop importing

Scenario 2 Legal Discovery Preparation

Problem: Law firm needs to produce 8,000 emails as evidence in PDF format with preserved headers.

Solution: Convert EML files to PDF with "Include Headers" option enabled. Each email becomes a separate PDF with complete metadata visible.

Compliance: Headers provide chain of custody evidence

Scenario 3 Deceased User Email Recovery

Problem: Family needs to access emails from deceased relative's computer running Windows XP with Outlook Express.

Solution: Copy EML files from old computer to USB drive. Convert to PDF on modern computer for easy reading without installing legacy software.

Benefit: No need to resurrect old software

Scenario 4 Thunderbird to Apple Mail Migration

Problem: User switching from Windows PC with Thunderbird to Mac needs to migrate 5 years of emails.

Solution: Export Thunderbird emails as EML (already native format), convert to EMLX for Apple Mail, or import directly using Apple Mail's EML support.

Alternative: Convert to MBOX for direct Apple Mail import

How It Works

Simple Conversion Steps

Follow this easy guide to convert your EML email files in minutes.

Step 1: Add EML Files

Launch EML Converter and click "Add Files" or "Add Folder" to load emails. Supports recursive folder scanning.

Step 2: Preview Emails

Browse and preview email content, headers, attachments before conversion.

Step 3: Select Format

Choose your desired output format: PST, PDF, MSG, MBOX, or others.

Step 4: Convert

Click Convert to export emails. Progress bar shows conversion status.

Quick Start Guide

Download & Install: Download Univik EML Converter and install on Windows.
Add EML Files: Click "Add Folder" to load all EML files from a directory recursively.
Preview Emails: Browse loaded emails in the preview panel. Check content and attachments.
Apply Filters: Optionally filter by date, sender, subject, or attachment presence.
Choose Format: Select output format (PST for Outlook, PDF for archival, etc.).
Set Options: Configure folder mapping, naming conventions and consolidation mode.
Convert: Click Convert button. Watch progress bar for large batches.

Video Tutorial

Watch EML Converter In Action

See how easy it is to convert thousands of EML files in minutes. Follow along with our step-by-step video guide.

Video Chapters

0:00 Introduction & Software Overview
0:45 Adding EML Files & Folders
1:30 Previewing Email Content
2:15 Applying Filters (Date, Sender)

3:00 Converting EML to PST
4:00 Converting EML to PDF
5:00 Batch Processing Options
6:00 Importing PST to Outlook

Quick Preview Animations

Step 1: Add Files

Drag & drop or browse folders

Step 2: Preview

View content before conversion

Step 3: Convert

Watch progress, done in minutes

Ready to try it yourself?

Download Free Trial

No credit card required • 25 files free

Comparison

Univik vs Other Solutions

See how Univik EML Converter compares to manual methods and online tools.

Univik EML Converter

Batch Processing: Convert 10,000+ EML files in one operation with recursive folder scanning.
15+ Export Formats: PST, MSG, MBOX, PDF, HTML, EMLX, MHT, RTF, TXT and cloud services.
Consolidation Mode: Merge thousands of EML files into a single organized archive.
Smart Folder Mapping: Preserves source folder structure in output automatically.
Complete Preview: View full email content, headers, attachments before conversion.
Attachment Options: Extract separately or embed in converted format.
Corrupted File Recovery: Extracts readable content from damaged EML files.
Unicode Support: Perfect handling of international characters and encodings.
Offline & Private: Desktop software works without internet - data stays local.

Manual Methods & Online Tools

One-by-One Processing: Manual drag-and-drop into Outlook takes hours for large collections.
Limited Formats: Most tools only convert to 2-3 formats.
No Consolidation: Cannot merge multiple EML files into single archive.
Lost Folder Structure: Manual import loses original organization.
No Preview: Blind conversion without ability to verify content first.
Attachment Issues: Some tools strip or corrupt email attachments.
No Recovery: Cannot process corrupted or malformed EML files.
Encoding Problems: Issues with special characters causing garbled text.
Privacy Risk: Online tools upload your emails to third-party servers.

Customer Reviews

What Our Customers Say

Real testimonials from users who converted their EML email files.

Michael S.

Systems Administrator, New York, USA

"We had 47,000 EML files from our old Windows Mail server that needed to be migrated to Exchange. Univik converted everything to PST in under 2 hours. The folder structure was perfectly preserved. Saved us days of manual work!"

Sarah K.

Paralegal, Boston, USA

"Our law firm needed to produce 12,000 emails as PDF evidence for a case. The EML to PDF conversion preserved all headers which was crucial for authentication. The attorney was impressed with the professional output."

David L.

IT Consultant, Toronto, Canada

"Client had a deceased family member's old computer with Outlook Express. Thousands of EML files going back 15 years. Univik recovered everything including some corrupted files that other tools couldn't handle. Invaluable!"

Technical Data Sheet

Technical Specifications

Complete product specifications, system requirements and compatibility information.

100%

VirusTotal Score: Clean

Verified by 70+ antivirus engines. 100% safe to download and use.

Virus free
Spyware free
Adware free

Supported Input Files

EML Files:
• Standard .eml files (RFC 5322)
• Windows Mail / Windows Live Mail
• Outlook Express exports
• Thunderbird exports
• Any RFC-compliant email files
Unlimited file count supported.

Product Name:	Univik EML Converter
Current Version:	25.1 (January 2025)
File Size:	18.2 MB
License Delivery:	Instant via Email
Free Trial:	Free Download 100% Safe & Secure

Latest Release

Version 25.1 Features

Enhanced batch processing speed
Improved consolidation mode
Better corrupted file recovery
Advanced folder mapping options
Updated PDF rendering engine

Trial Limitations:

Free demo allows unlimited preview. Export limited to first 25 EML files. Purchase license for unlimited conversion.

Hard Disk:	100 MB free (500 MB recommended for large batch conversions)
RAM:	4 GB minimum (8 GB recommended for 10,000+ files)
Processor:	Intel Core i3 or equivalent

Platforms:

Windows: 11, 10, 8.1, 8, 7 (32 & 64-bit)
Server: 2022, 2019, 2016, 2012

Prerequisites:

Standalone: No additional software required
Offline: Works without internet after install
PST Export: Microsoft Outlook not required

Use Cases

Who Benefits from EML Converter

Real-world scenarios where Univik EML Converter provides the ideal solution.

IT Departments

Migrating legacy Windows Mail or Outlook Express archives to modern Exchange/Office 365 environments. Batch convert thousands of EML files to PST.

Digital Forensics

Processing email evidence with complete header preservation. Convert to PDF for court submissions or individual MSG files for eDiscovery platforms.

Compliance Officers

Creating searchable archives for GDPR, HIPAA, SOX compliance. Convert EML to PDF with preserved metadata for audit trails.

Personal Archival

Individuals organizing years of scattered EML files into consolidated archives. Convert to PDF for permanent storage independent of email software.

Cloud Migration

Moving local EML archives to cloud services. Convert to formats suitable for Gmail, Office 365, or corporate IMAP servers.

Legal Professionals

Preparing email evidence for litigation. Convert EML to PDF with headers for authentication, or to MSG for legal hold systems.

Industry Solutions

EML Conversion for Your Industry

Tailored solutions addressing specific compliance requirements and workflows for different professional sectors.

Legal & Law Firms

eDiscovery, Litigation Support, Evidence Production

FRCP Compliance Chain of Custody Court Admissibility

eDiscovery: Export EML to PDF with full headers for legal review
Evidence Preservation: Convert to MSG for legal hold platforms
Metadata Retention: All routing information preserved for authentication
Batch Processing: Handle millions of emails for large cases

✓ Supports Relativity, Concordance, Summation

Healthcare & Medical

Patient Records, PHI Protection, Compliance Archives

HIPAA Compliance PHI Protection Audit Trail

PHI Archives: Convert patient communications to secure PDF
Offline Processing: Data never leaves your network (HIPAA safe)
Retention Compliance: Create dated archives for 7-year retention
Encryption Ready: Output compatible with encrypted storage

✓ 100% offline - no cloud uploads

Financial Services

Transaction Records, Regulatory Compliance, Audit

SOX Compliance SEC 17a-4 FINRA Rules

SEC Compliance: Archive broker-dealer communications
Audit Trail: Searchable PDF archives with timestamps
WORM Storage Ready: Convert for compliant storage systems
Batch Dating: Organize by fiscal year or quarter

✓ Immutable archive creation

Government & Public Sector

Public Records, FOIA Requests, Agency Migration

FOIA Compliance Records Retention FedRAMP Ready

FOIA Requests: Quickly convert and redact responsive emails
Agency Migration: Convert legacy email to modern formats
Records Management: Create searchable archives per NARA guidelines
Air-Gapped Systems: Works fully offline for secure networks

✓ Deployed in federal agencies

Education & Academia

Student Records, Faculty Communications, Research

FERPA Compliance Student Privacy Research Archive

Student Records: Archive communications per FERPA requirements
Faculty Transition: Migrate departing faculty email archives
Research Data: Preserve research correspondence for grants
Budget-Friendly: Educational discounts available

✓ Academic pricing available

IT & Managed Service Providers

Client Migrations, Multi-tenant Support, Automation

Bulk Licensing CLI Support White Label

Client Migrations: Efficient EML to PST for Office 365 migrations
Command Line: Automate with scripts for multiple clients
Volume Licensing: Unlimited conversions with enterprise license
Silent Install: Deploy via RMM tools (SCCM, PDQ, Intune)

✓ MSP partner program available

Compliance & Regulation Matrix

Regulation	Industry	Requirement	Univik Feature
HIPAA	Healthcare	PHI protection, audit logs	✅ Offline processing, no data uploads
SOX	Financial	7-year retention, searchable	✅ PDF archives with full metadata
GDPR	All (EU)	Data portability, deletion	✅ Export to standard formats
FRCP	Legal	ESI production format	✅ Native EML/MSG preservation
FERPA	Education	Student record protection	✅ Local processing, no cloud
FOIA	Government	Public records access	✅ Batch export with filtering

File Locations

Where to Find EML Files

Quick reference guide to locate EML files from popular email clients and exports.

Windows Mail / Windows Live Mail

Windows Mail (Vista/7):

C:\Users\[Username]\AppData\Local\Microsoft\Windows Mail\Local Folders\

Windows Live Mail:

C:\Users\[Username]\AppData\Local\Microsoft\Windows Live Mail\

Each email is stored as a separate .eml file in subfolders (Inbox, Sent, etc.)

Outlook Express (Legacy)

Windows XP Default:

C:\Documents and Settings\[Username]\Local Settings\Application Data\Identities\{GUID}\Microsoft\Outlook Express\

Note: Outlook Express stores emails in .dbx files. Export individual emails as .eml files first using Outlook Express, or use a DBX converter.

Mozilla Thunderbird

Export EML from Thunderbird:

Select email(s) in Thunderbird
File → Save As → File
Choose location and save as .eml

Or use ImportExportTools NG addon for batch EML export from Thunderbird's native MBOX storage.

eM Client / Other Clients

eM Client:

C:\Users\[Username]\AppData\Roaming\eM Client\

Export to EML: Most modern email clients support "Save As" or "Export" to EML format. Select emails and use File → Export or drag-and-drop to a folder.

Export Guide

How to Export EML Files from Email Apps

Step-by-step visual guides to save emails as EML files from the most popular email applications.

Microsoft Outlook

Desktop & Microsoft 365

Method 1: Drag and Drop (Easiest)

Select email(s) in Outlook

Open a folder in File Explorer

Drag emails to folder → Saved as .msg

Method 2: Save As EML

Open the email you want to save
Click File → Save As
In "Save as type" dropdown, select "Outlook Message Format - Unicode (*.msg)" or "Text Only (*.txt)"
For EML format: Save as .txt then rename extension to .eml, or use Univik MSG Converter to convert MSG to EML

💡 Pro Tip: Outlook natively saves as MSG format. Use Univik EML Converter to batch convert MSG files to EML if needed, or convert EML to MSG for Outlook import.

Mozilla Thunderbird

Windows, macOS, Linux

Method 1: Save As (Single or Multiple)

Select email(s)

File → Save As

Choose folder

Saves as .eml

Method 2: ImportExportTools NG (Batch Export)

Install ImportExportTools NG addon from Thunderbird Add-ons
Right-click on any folder (Inbox, Sent, etc.)
Select ImportExportTools NG → Export all messages in folder → EML format
Choose destination folder → All emails exported as individual .eml files

✅ Best for Batch Export: ImportExportTools NG addon is the recommended method for exporting hundreds or thousands of emails from Thunderbird.

Gmail

Web & Google Workspace

Method 1: Download Single Email as EML

Open email in Gmail

Click ⋮ (More)

"Download message"

Saves as .eml file

Method 2: Google Takeout (Bulk Export)

Go to takeout.google.com
Deselect all, then select only "Mail"
Click "All Mail data included" → Choose specific labels or all
Create export → Download ZIP file
Extract ZIP → Find .mbox file → Use Univik MBOX Converter to convert to EML

⚠️ Note: Gmail Takeout exports as MBOX format, not individual EML files. Use our MBOX Converter to convert MBOX to individual EML files.

Apple Mail

macOS & iOS

Method 1: Drag and Drop

Select email(s) in Apple Mail

Open Finder window

Drag to folder → Saves as .eml

Method 2: File Menu Export

Select one or more emails in Apple Mail
Go to File → Save As... (or press ⌘ + S)
Choose "Raw Message Source" format
Save to desired location with .eml extension

💡 Batch Export: For bulk export, navigate to ~/Library/Mail/V[x]/ and copy the .emlx files. Use Univik EML Converter to batch convert EMLX to standard EML format.

Yahoo Mail

Web Interface

Method 1: Download Raw Message

Open email in Yahoo

Click ⋯ (More)

"View raw message"

Save page as .eml

Method 2: POP3/IMAP Download

Configure Yahoo Mail with POP3 in Thunderbird or Outlook
Server: pop.mail.yahoo.com (Port 995, SSL)
Download all emails to local client
Export from local client as EML files

📧 Alternative: Use Yahoo's "Forward as attachment" feature to send emails to yourself, then download the attached .eml files.

Quick Reference: EML Export Methods

Email Application	Native EML Support	Easiest Method	Bulk Export
Microsoft Outlook	MSG format	Drag & Drop to folder	Use Univik MSG to EML Converter
Mozilla Thunderbird	Yes ✓	File → Save As	ImportExportTools NG addon
Gmail	Yes ✓	More → Download message	Google Takeout (MBOX) + Convert
Apple Mail	Yes ✓	Drag to Finder	Copy from ~/Library/Mail/
Yahoo Mail	Limited	View Raw → Save	POP3 download via Thunderbird
Windows Mail	Yes ✓	Already .eml files!	Copy from AppData folder

Got Your EML Files Ready?

Now convert them to PST, PDF, MSG, or any other format with Univik EML Converter!

Download Free EML Converter

Help & Support

Frequently Asked Questions

Find answers to common questions about Univik EML Converter.

EML (Electronic Mail) is a standard email file format where each file contains exactly one email message including headers, body and attachments. It's used by Windows Mail, Outlook Express, Thunderbird (exports) and many other email clients. You need to convert EML files when: (1) Migrating to Outlook which uses PST format, (2) Consolidating thousands of scattered files into organized archives, (3) Creating PDF copies for legal compliance, (4) Archiving for long-term storage, or (5) Accessing emails without the original email client.

Many email clients use EML format: Windows Mail, Windows Live Mail, Microsoft Outlook Express (exports), Mozilla Thunderbird (exports), Apple Mail (exports), eM Client, Postbox, Mailbird, The Bat! and most email clients that support "Save As" functionality. EML is also the standard format for forensic email acquisition and email exports from web-based services.

Yes, this is one of our most popular features! Univik EML Converter can batch convert thousands of EML files into a single consolidated Outlook PST file. The software preserves folder structure based on source directories, so emails from "Inbox" folder appear in "Inbox" in the PST. You can also create custom folder mappings during conversion.

Yes, 100% attachment preservation! All email attachments are fully preserved during conversion: documents (PDF, Word, Excel), images (JPG, PNG, GIF), archives (ZIP, RAR) and any other file type. You can also choose to extract attachments separately into a folder while converting emails.

Unlimited! Univik EML Converter is designed for batch processing. We've tested with collections exceeding 100,000 EML files. The software uses efficient memory management and processes files sequentially, so you're limited only by available disk space for the output.

Yes, we have advanced recovery mode! The converter can extract readable content from partially corrupted EML files. It handles: encoding errors, truncated files, missing or malformed headers, invalid MIME boundaries and character encoding issues. Files that other tools reject can often be recovered.

Your data is completely safe and private. Univik EML Converter is a desktop application that works 100% offline. Your emails are never uploaded to any server. All processing happens locally on your computer. The original EML files are never modified - only new output files are created.

No, Outlook is NOT required! Univik EML Converter creates PST files independently using its own PST library. You can create PST files on any Windows computer, then transfer the PST to a computer with Outlook for import. This is especially useful for server-side batch processing.

Yes, powerful filtering options available! Filter EML files by: date range (sent/received), sender email address, recipient, subject keywords, emails with attachments only, or file size. This is especially useful for legal discovery, creating targeted archives, or migrating only recent emails.

The free trial provides full functionality for evaluation: unlimited file loading, complete email preview, all features available. Export is limited to the first 25 EML files. Purchase a full license ($39) for unlimited conversion. Volume discounts available for enterprise deployments.

Still have questions? Contact support or Live Chat