Free online MSG to HTML converter

Source format: MSG

MSG is a Microsoft Outlook message file format used to store a single email message, including the sender, recipients, subject, body, attachments, and sometimes calendar or task-related metadata. It is most commonly created and used in Microsoft Outlook and other email tools that can read Outlook message files. MSG files are often used for archiving individual emails, sharing messages outside a mailbox, or preserving message content with attachments in a portable file.

Target format: HTML

HTML is the standard markup format for web pages and web-friendly documents. Converting an email to HTML preserves the message content in a format that can be opened in any browser, embedded in websites, or reused in documentation systems. HTML is widely compatible, easy to view, and useful when you want an email message to remain readable without requiring Outlook or a mail client.

How to perform the conversion

The best method depends on whether you need a quick one-off conversion or a batch workflow. For a single file, you can use Microsoft Outlook if the MSG file opens correctly there, or a dedicated desktop converter that supports exporting email messages to HTML. If you want a simple browser-based option, you can convert the file on 101convert.com for free without installing any software.

1. Open the .msg file in a compatible email application or converter.
2. Choose an export or save option that outputs HTML.
3. If using Outlook, open the message and use File → Save As, then select HTML as the file type if available.
4. Save the result as a .html or .htm file.
5. Open the exported file in a web browser to verify that the body text, formatting, and attachments were preserved as expected.

For batch conversion, desktop tools that support email export are usually better than manual saving because they can process multiple MSG files at once and preserve structure more consistently. If you need automation, some mail-processing libraries and scripts can extract MSG content and generate HTML, but that is more technical than a normal desktop workflow.

Notes on quality and limitations

HTML output is usually very good for message body formatting, but there are some limitations. Attachments are not always embedded automatically; they may be saved separately or linked from the HTML file. Outlook-specific features such as voting buttons, categories, or some calendar metadata may not translate cleanly. Inline images, signatures, and rich formatting can also vary depending on the converter used.

Another important point is that MSG is a proprietary Microsoft format, so conversion quality depends heavily on the software reading it. If the file was created in Outlook, the best fidelity usually comes from Outlook itself or a converter designed specifically for Outlook messages. For long-term archiving, HTML is convenient and readable, but it is not as self-contained as the original MSG file unless attachments and linked resources are preserved alongside it.