Combine Documents Online — Merge Email Files: MSG, OST, PST, MBOX, EML

Upload 2 MSG, EML, OST, MBOX or PST files to merge emails online. You can view, download or send the combined result as email.

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Merge and combine multiple email files into a single EML, MBOX, PST, MSG or OST document. With Email Merger App you can easily review, share, send or print the result file. Merger App has a flexible interface to create your own scenarios of merging message files. You can change the resulting file format and the order of merger emails.

Aspose.Email SDKs allow you to process emails in different ways, one of them is merging email files. Merge Outlook, Thunderbird, G Suite and many other email file formats without additional apps installed.

All our online Apps are secure, fast, reliable, easy to use and absolutely free. You can add these features to your app with Aspose.Email SDKs. Have a closer look at Aspose.Email documentation to get more details on how to use it.

In case you are interested in the development of professional high-performance email-orientated software solutions, take a look at our Cloud approach. Aspose.Email Cloud SDKs provide you with creating, processing, reading, sending and receiving, manipulate email files, also combining email files and more other easy to use functions for almost all programming languages.

In case you are interested, also take a look at all Aspose.Email products.

Please, feel free to check our powerful Cloud SDKs and other easy-to-use online Apps.


Aspose.Email Merger

  • Merge two emails into one.
  • Merge mails online.
  • Merge emails from Outlook, Gmail, Thunderbird, Apple Mail, eM Client, Mailbird and other email clients.
  • Merge mails with attachments.
  • Combine different email file formats into one.
  • Merge PST files online.
  • Download, view online or send the combined email file.
  • Merge EML, MSG, PST, OST, MBOX

How to merge Email files

  • Click inside the file drop area to upload an email file or drag & drop an email file.
  • Click the 'MERGE' button to start merging files.
  • Instantly download, view or send merged file as an email.
  • You can also send a link of merged files to your email address.
  • Note that file will be deleted from our servers after 24 hours and download links will stop working after this time period.
Fast and Easy Way to Merge

Fast and Easy Way to Merge

Upload your documents and click on “MERGE NOW” button. It will merge your document files into one and provide you a download link to download merged document. The output format will be the output format of your first document.

Merge from Anywhere

Merge from Anywhere

It works from all platforms including Windows, Mac, Android and iOS. All files are processed on our servers. No plugin or software installation required for you.

Merge Quality

Merge Quality

Powered by Aspose.Email. All files are processed using Aspose APIs, which are being used by many Fortune 100 companies across 114 countries.


  • ❓ How can I merge email files?
    With Aspose.Email Merger you can merge email files online. First, you need to add a file for merge: drag & drop your Email file or click inside the white area to choose a file. Then click the "Merge" button. When Email merging is completed, you can download your result file.
  • 🗂 Which email formats can I merge?
    Email Merger works with EML, MSG, MBOX, OST, PST.
  • 🛡️ Is it safe to merge Emails using free Aspose.Email Merger?
    Of course! The download link of result files will be available instantly after merging. We delete uploaded files after 24 hours and the download links will stop working after this time period. No one has access to your files. File merging is absolutely safe.
  • 💻 Can I merge emails on Linux, Mac OS or Android?
    Yes, you can use free Aspose.Email Merger on any operating system that has a web browser. Our Email Merger app works online and does not require any software installation.
  • ✅ Can I use Aspose.Email Merger in my projects?
    Absolutely! Aspose.Email provides a high-performance API. Using Aspose.Email you can convert, view, edit and process emails in the way you need. You can use one of its SDKs on your platform or use Email Cloud approach, which is safety, fast and reduces the load on your system.

All Supported Mergers

You can merge many file formats. Please see the list below.