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What is EML?

EML is the standard email file format following RFC 822, used by most email clients for message storage and export.

What is MSG?

Outlook Message (MSG) is the email message format used by Microsoft Outlook, storing emails with attachments and metadata.

When Should You Use EML vs MSG?

Use EML When...

Reach for EML when your priority is email export, message archiving, mail migration — its uncompromising quality ensures every detail is preserved.

Use MSG When...

Reach for MSG when your priority is email archiving, outlook data extraction — its uncompromising quality ensures every detail is preserved.

EML vs MSG: Key Differences

  • •The core technical difference: EML relies on lossless compression whereas MSG uses lossless compression.
  • •Neither format changes compression philosophy — both are lossless compression — so any size differences are due to encoding efficiency, not a shift in quality approach.
  • •Transparency: N/A
  • •File sizes: EML files typically range Small for plain text, larger with attachments and MSG files Varies by attachment size.
  • •EML is optimized for email export, message archiving, mail migration while MSG is designed for email archiving, outlook data extraction — choose based on your specific workflow needs

Advantages of EML

  • ✓EML compresses data using lossless methods, keeping file sizes manageable for Email export, message archiving, mail migration.
  • ✓Industry-wide support means EML files open anywhere — from legacy systems to the latest devices.
  • ✓Lossless quality makes EML the gold standard for archival and master copies.
  • ✓From professional software to open-source alternatives, EML works out of the box.

Advantages of MSG

  • ✓MSG uses lossless compression tailored for Email archiving, Outlook data extraction.
  • ✓MSG is supported natively on virtually every device, browser, and operating system.
  • ✓MSG files are bit-for-bit perfect, preserving every pixel and sample for professional work.
  • ✓MSG integrates seamlessly with all major creative tools and workflows.

Common Use Cases for EML to MSG Conversion

  • Compliance documentation
  • Meeting minutes and notes
  • Project proposals
  • Invoice and billing documents
  • Onboarding materials
  • Policy and procedure manuals

Industry Applications

Government AdministrationHealthcare RecordsFinancial ServicesHuman ResourcesSupply Chain ManagementInsurance

Best Practices for EML to MSG Conversion

  • →Before converting EML to MSG, review the document structure — multi-column layouts, text boxes, and floating images behave differently across formats
  • →Export a PDF preview alongside the MSG file so you have a reference of how the document should look
  • →Check that hyperlinks and cross-references survived the EML to MSG conversion — some formats handle links differently
  • →Run a spell check before conversion to avoid propagating errors into the final document
  • →Keep the original editable file in case the conversion introduces layout shifts
  • →Test the output on at least two different applications or devices

Troubleshooting EML to MSG Conversion

  • !EML to MSG formatting looks off → complex layouts with tables and columns may shift between formats
  • !Fonts render differently in MSG → embed fonts or use standard web-safe fonts before converting
  • !Images missing from the MSG output → ensure images are embedded in EML, not linked externally
  • !Tracked changes disappeared after converting EML to MSG → some document formats don't support revision tracking

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Convert EML files to MSG online for free. High-quality conversion with no registration required.

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About EML and MSG

EML

EML (EML emails) - Email Message, RFC 822 standard email file format. Best for email export, message archiving, mail migration.

MSG

MSG (Outlook MSG) - Outlook Mail Message, email with attachments and metadata. Ideal for email archiving, outlook data extraction.

Format Comparison

CompressionLossless → Lossless
TransparencySupported
Use CaseConvert from email export, message archiving, mail migration to email archiving, outlook data extraction
File Size~Varies by attachment size after conversion

FAQs

Is converting EML to MSG free?

Yes, GoConvertFile offers free conversion of EML to MSG for files up to 100MB. No registration required.

How long does it take to convert EML to MSG?

Most EML to MSG conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is MSG best used for?

MSG is ideal for email archiving, outlook data extraction. Outlook Mail Message, email with attachments and metadata

What file size should I expect after converting EML to MSG?

File size after EML to MSG conversion depends on the content complexity and quality settings. Both formats use similar compression approaches so sizes are comparable.

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