Convert MSG to HTML Online

The free online mail converter that transforms EML, MSG, PST, and MBOX files into PDF, HTML, Word, and more — no software required.

CoolUtils online mail converter supports all major email formats as input — EML, MSG, PST, OST, and MBOX — and converts them to PDF, HTML, DOC, TXT, JPEG, and other output formats. Upload the file, select the output format, and download the converted document in seconds. No installation, no registration, completely free.

CONVERT MSG to HTML ONLINE

1) Upload MSG file to convert

Drop files here, or Click to select

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Allowed file types: pst, ost, eml, msg, mime, smime, p7m, mbox, dbx, vcf, vmbx, opf, asice, cpgz, lzh, zcf

2) Set converting MSG to HTML options

3) Get converted file

DOWNLOAD CONVERTED FILE

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Convert Emails in Batch!;
Convert MSG to HTML and in many other formats
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Total Mail Converter

Convert emails from multiple sources to a variety of formats.

Filter emails that you want to process with our 2-level filtering.

Useful data saving options - convert only necessary data from your emails.

Unique output files formatting options specify how your files will look.

Affordable Price - pay once for a lifetime license with no hidden fees.

Command Line Support - convert emails via command line.

Fast batch conversion - convert multiple emails simultaneously.

High security options - protect your output PDF files.

Various file naming and date saving options - organize your output files easily.

Variety of attachment saving options - choose how to save attachments.

Trust - you can rely on powerful email converters from CoolUtils.

Easy to use even for beginners - enjoy clear user-friendly interface.

How to convert MSG to HTML?

💾 Upload Your File: Go to the site, click on «Upload File,» and select your MSG file.

✍️ Set Conversion Options: Choose HTML as the output format and adjust any additional options if needed.

Convert and Download: Click 👉«Download Converted File»👈 to get your HTML file.

Cloud Based

There is no need to install any software to convert MSG to HTML with CoolUtils. Simply access the internet, and you can easily convert your file online with our service.

Secure

Our hardware operates in top-tier, highly secure data centers equipped with advanced electronic surveillance and multi-factor access control systems.

Ease of Use

Converting MSG Outlook emails to HTML web pages online has never been so simple. Drop your .msg file and the converter produces a browser-readable HTML — perfect for archiving, sharing, and publishing email content without Outlook.

Privacy

We understand the importance of privacy, which is why we've developed a comprehensive privacy policy detailing how we handle your files and personal information. You can read the policy here.

MSG File

File extension	.MSG
Category	Document File
Description	MSG file is a MS Outlook email saved to a separate file. Such mail format is also used in The Bat!, Windows Mail, MDaemon, etc. It contains email fields and attachments, supporting both plain text and HTML mail formatting. As a rule, the mail content is encoded by base64 scheme. Encoding is required for mail to pass the mail servers that originally process text only. MSG can be opened in the program version it was created in, and the file will conflict with all other applications. To convert .MSG to PDF, HTML, TXT or other formats use the online converter.
Associated programs	CoolUtils MSG Viewer
Developed by	Microsoft
MIME type
Useful links	MSG Formats More detailed information on MSG files
Conversion type	MSG to HTML

HTML File

File extension	.HTML
Category	Document File
Description	HTML allows creating structured documents and web pages. HTML file contains command tags in angular brackets that mark out each element like title, paragraphs, quotes, links, lists, etc. Web-pages generated with HTML have .html extension (for a static web-page). HTML code is processed by a browser, while user sees only the text and other elements of the page without any tags. The source code can be viewed separately. HTML files can be edited in a common text editor like a TXT file.
Associated programs	Any Web Browser (e.g. Internet Explorer, Safari, Firefox, Google Chrome)
Developed by	World Wide Web Consortium & WHATWG
MIME type	text/html
Useful links	More detailed information on HTML files

2026-01-14

I needed to publish an archived email thread on our internal wiki and this converted the MSG file to clean HTML in seconds — formatting and all. Saved me hours of manual copy-pasting.

Markus Hoffmann

2026-03-08

We use it to archive old Outlook emails in a browser-viewable format for our compliance portal. Works reliably for batch jobs, though embedded images sometimes need a path adjustment.

Priya Venkataraman

2026-05-02

Extracting email content from MSG files for our CMS was a pain until we found this tool — now we pipe the HTML output directly into our publishing workflow. No email client needed on the server.

Carlos Reyes Montoya

Rating MSG to HTML

4.7 (530 votes)Rate It

MSG to HTML Converter — Frequently Asked Questions ▼

What is an MSG file?

MSG is Outlook's per-email format, based on the Compound File Binary Format. Each .msg file holds one message — headers, body (plain and HTML), recipients, embedded images, and Outlook-specific properties — and opens natively only in Outlook.

How do I convert MSG to HTML online?

Upload your .msg file using the button above. The converter parses the OLE compound structure, extracts the HTML body, prepends a styled header block (From, To, Subject, Date), and returns a single .html file ready to open in any browser.

Are embedded images preserved?

Yes. Images stored inside the MSG (inline images and signature graphics) are extracted and embedded as base64-encoded data URIs in the HTML, so the file stays self-contained — no separate image files needed.

What about attachments?

Attachments are listed at the bottom of the HTML with their original filenames. To extract the binary attachments themselves, use the desktop Total Outlook Converter, which saves them as separate files alongside the HTML output.

Will the HTML look like the original email?

Yes. The Outlook HTML body is preserved with its original styling — fonts, colours, tables, bullet lists, embedded images — so the result looks the same in a browser as it did in Outlook.

What is the maximum file size?

The online converter accepts MSG files up to 50 MB. Most emails are well under 1 MB; the limit only matters when a message includes large embedded images or attachments.

Are my uploaded files kept private?

Files are deleted automatically after you download the HTML. They are not stored or shared. For confidential or legal-hold material, run the conversion locally with Total Outlook Converter.

Convert MSG to HTML — Outlook Mail as a Web Page

MSG only opens in Outlook, but HTML opens in every browser. Converting MSG to HTML preserves the message body, formatting, embedded images, and header block, and gives you a self-contained web page that can be archived, emailed, or attached to a ticket. Drop your .msg file above.

What Is MSG?

MSG is Microsoft Outlook's per-email format, based on the Compound File Binary Format (CFBF / OLE2). Each .msg file holds one message: headers, plain-text and HTML bodies, recipients, embedded images, attachments, and Outlook-specific properties like flags and categories. The format opens natively in Outlook and a few Outlook-aware utilities but is opaque to almost everything else.

What Is HTML?

HTML (HyperText Markup Language) is the markup language every browser renders. Tags such as <p>, <table>, <img>, and <a> describe the structure; CSS supplies the styling. HTML is universal: Chrome, Safari, Firefox, Edge, mobile browsers, email clients, content management systems, and search-engine crawlers all read it natively. An HTML email archive opens with one double-click anywhere.

MSG vs HTML — Format Comparison

Property	MSG	HTML
Year	1997 (Outlook 97)	1993 (Tim Berners-Lee)
Container	Binary OLE compound	Plain text
Opens in	Outlook only (natively)	Every browser
Searchable text	Through Outlook	OS-level grep / full-text
Archival	Risky (binary, vendor-specific)	Long-term safe
Printable	Via Outlook	Directly from any browser
Embeds in ticketing/CRM	No	Yes

When Do You Need MSG to HTML Conversion?

Open an Outlook message on a Mac, Linux machine, or phone without Outlook installed
Attach a customer email to a support ticket as a viewable HTML file
Embed an email in a CMS or wiki page
Archive Outlook correspondence in a format that will outlive Outlook
Print or PDF an email through the browser's standard print dialog
Send an Outlook message to someone who cannot open .msg files

Command-Line Conversion

Batch-convert an entire folder without opening the interface:

TotalOutlookConverter.exe C:\msg_files C:\html_out /ConvertTo html /ProcessRecursively

Add /ProcessRecursively to include subfolders. Save the command in a .bat file for scheduled or automated runs.

Online vs Desktop

Feature	Online (this page)	Total Outlook Converter (desktop)
File size limit	50 MB	Unlimited
Batch conversion	One file at a time	Entire folders at once
Software install	None required	Windows 7–11
Output options	Standard	Full control
Command-line	No	Yes
Privacy	File uploaded to server	Stays on your computer
Price	Free	From $49.90

Convert MSG to HTML Online