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What is MPP?

Microsoft Project (MPP) is a project management file format used for storing project plans, schedules, resource assignments, and Gantt charts.

What is EML?

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

When Should You Use MPP vs EML?

Use MPP When...

Reach for MPP when your priority is project plans, gantt charts, task tracking — its efficient compression makes sharing fast and storage minimal.

Use EML When...

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

MPP vs EML: Key Differences

  • •MPP uses lossy compression while EML uses lossless compression — this is the fundamental technical difference between the two formats.
  • •Moving from MPP (lossless) to EML (lossless) means the output file will be larger — but every bit of the original is preserved.
  • •Alpha channel support: EML lacks transparency support.
  • •File sizes: MPP files typically range 500KB to 50MB for large projects and EML files Small for plain text, larger with attachments.
  • •MPP is optimized for project plans, gantt charts, task tracking while EML is designed for email export, message archiving, mail migration — choose based on your specific workflow needs

Advantages of MPP

  • ✓MPP uses lossy compression tailored for Project plans, Gantt charts, task tracking.
  • ✓MPP is supported natively on virtually every device, browser, and operating system.
  • ✓MPP files are compact and quick to transfer, even over slow connections.
  • ✓MPP integrates seamlessly with all major creative tools and workflows.

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.

Common Use Cases for MPP to EML Conversion

  • Onboarding materials
  • Policy and procedure manuals
  • Grant applications
  • Case studies and whitepapers
  • Professional reports and proposals
  • Academic papers and theses

Industry Applications

Supply Chain ManagementInsuranceReal EstateRegulatory ComplianceBusiness AdministrationAcademic Publishing

Best Practices for MPP to EML Conversion

  • →Before converting MPP to EML, review the document structure — multi-column layouts, text boxes, and floating images behave differently across formats
  • →Export a PDF preview alongside the EML file so you have a reference of how the document should look
  • →Check that hyperlinks and cross-references survived the MPP to EML 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 MPP to EML Conversion

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

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

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About MPP and EML

MPP

MPP (Project MPP) - Microsoft Project, project management file format. Best for project plans, gantt charts, task tracking.

EML

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

Format Comparison

CompressionLossy → Lossless
TransparencySupported
Use CaseConvert from project plans, gantt charts, task tracking to email export, message archiving, mail migration
File Size~Small for plain text, larger with attachments after conversion

FAQs

Is converting MPP to EML free?

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

How long does it take to convert MPP to EML?

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

What is EML best used for?

EML is ideal for email export, message archiving, mail migration. Email Message, RFC 822 standard email file format

Does converting MPP to EML lose quality?

No, converting MPP to EML does not cause additional quality loss — EML uses lossless compression. However, any artifacts already present in the original MPP file will persist in the EML output.

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

EML files are typically 2-5x larger than equivalent MPP files because EML preserves all pixel data. This is expected and necessary for lossless quality.

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