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EML EMLX

Convert EML to EMLX
Online Tool

Convert EML files to EMLX format online. Free tool, EU servers, GDPR compliant, auto-delete 24h. No software to install.

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What is a EML file?

EML (Email Message) is the file format used by Windows Mail, Thunderbird, most clients. It stores email messages along with their metadata, attachments, and folder structure.

EML files are commonly encountered when:
- Migrating between email platforms — switching from Windows Mail, Thunderbird, most clients to another system
- Email archiving — long-term storage of email communications
- Legal and compliance — eDiscovery and regulatory requirements
- Backup and recovery — protecting email data from loss

While EML is widely used in its native ecosystem, working with these files outside of Windows Mail, Thunderbird, most clients can be challenging without proper conversion tools.

What is a EMLX file?

EMLX (Apple Mail Message) is the format used by Apple Mail (macOS/iOS). It provides a structured way to store and organize email messages with full support for attachments, metadata, and folder hierarchies.

EMLX is the preferred format for:
- Apple Mail (macOS/iOS) — native file format for import and export
- Cross-platform compatibility — supported on macOS / iOS
- Email archiving — reliable long-term storage
- Data migration — widely accepted by email migration tools

By converting to EMLX, your emails become accessible in Apple Mail (macOS/iOS) and compatible email applications.

Why convert EML to EMLX?

Converting EML to EMLX is essential in several scenarios:

1. Migrating to Apple Mail (macOS/iOS)
If you're moving to Apple Mail (macOS/iOS), converting EML to EMLX allows you to import your entire email archive with folder structure and metadata preserved.

2. Cross-platform access
EML files require Windows Mail, Thunderbird, most clients to open natively. Converting to EMLX makes your emails accessible on macOS / iOS.

3. Email archiving and compliance
Organizations often need to convert email archives between formats for legal discovery, compliance requirements, or long-term storage strategies.

4. Opening emails without Windows Mail, Thunderbird, most clients
If you receive a EML file but don't have Windows Mail, Thunderbird, most clients, converting to EMLX lets you access the emails in Apple Mail (macOS/iOS) or any compatible client.

EML vs EMLX — Key Differences

Feature EML EMLX
Ecosystem Universal (most email clients) Apple ecosystem
File structure Plain text (RFC 5322 MIME) Plain text with Apple metadata plist
Openness Open standard (RFC 5322) Apple proprietary extension of EML
Platform Any OS macOS / iOS
Data types Single email message Single email message
Free readers Most email clients Apple Mail only (natively)

3 methods to convert EML to EMLX

Method 1: Manual conversion via email client

Import the EML file into a compatible email client, then export in EMLX format. This requires having both source and target applications installed.

Pros

  • ✓ Free if you already have the software
  • ✓ Full control over the process

Cons

  • ✗ Requires specific software installed
  • ✗ Multi-step manual process
  • ✗ Time-consuming for large files
  • ✗ Risk of data loss during manual steps

Method 2: Desktop conversion software

Several desktop converters can handle the EML to EMLX conversion locally. These paid tools typically cost between $29 and $99 per license.

Pros

  • ✓ Direct conversion
  • ✓ Works offline

Cons

  • ✗ Paid ($29-$99)
  • ✗ Windows only
  • ✗ Installation required
  • ✗ Limited file size support
Recommended

Method 3: MailtoPst (online, free trial)

Upload your EML file to MailtoPst, select EMLX as the output, and download. Works from any browser, no software needed.

Pros

  • ✓ First conversion free
  • ✓ No Windows Mail, Thunderbird, most clients needed
  • ✓ Works on Mac, Linux, Windows
  • ✓ Preserves folder structure
  • ✓ GDPR compliant, EU servers

Cons

  • ✗ Requires internet connection
  • ✗ Paid after first conversion
Try MailtoPst →

Step by step

How to convert EML to EMLX with MailtoPst

01

Upload your EML file

Drag & drop or click to upload your .eml file. Files up to 51 GB supported with resumable upload.

02

Choose EMLX as output

Select EMLX from the format dropdown. MailtoPst auto-detects the best conversion settings.

03

Download your EMLX file

Conversion takes seconds. Download your .emlx file or receive it by email.

Convert your EML to EMLX now →

100 MB free credit. No credit card required.

FAQ

Frequently Asked Questions

Can I convert EML to EMLX without Windows Mail, Thunderbird, most clients?

Yes. MailtoPst reads EML files server-side — you don't need Windows Mail, Thunderbird, most clients installed. Just upload the file from any browser on any operating system.

Will my folder structure be preserved?

Yes. MailtoPst preserves the original folder hierarchy from your EML file when converting to EMLX.

Is EML to EMLX conversion free?

Your first conversion is free with no credit card required. Credit packs start from €4.99.

What about attachments and metadata?

MailtoPst preserves all attachments, email headers, timestamps, read/unread status, and other metadata during the conversion.

How large can my EML file be?

MailtoPst supports files up to 50 GB with resumable upload technology. If your connection drops, you can resume where you left off.

Related conversions

EML → PST EMLX → PST MBOX → EML PST → EML PST → EMLX
See all 30 conversion paths →

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