Convert EML 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 EML to HTML ONLINE

1) Upload EML 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 EML to HTML options

3) Get converted file

DOWNLOAD CONVERTED FILE

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Convert EML 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 EML to HTML?

💾 Upload Your File: Go to the site, click on «Upload File,» and select your EML 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 EML 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 EML to HTML online has never been so simple. Drop your email message file and the converter produces a clean HTML page — sender, recipient, subject, date, and body text rendered in browser-readable markup. Embed email content in web pages, CMS, or documentation systems. No email client required.

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.

EML File

File extension	.EML
Category	Document File
Description	EML files are commonly used for email files generated in Outlook Express and other mail systems. EML emails are stored in standard MIME RFC 822 format. These files include the email headline and body in text ASCII format. Emails, attachments, and hyperlinks are all included when converting EML to PDF. Users can export EML files for archiving and storage and check for harmful code. EML files are compatible with Microsoft Entourage, Apple Mail, Thunderbird, IncrediMail, Outlook Express, and more.
Associated programs	CoolUtils Mail Viewer Apple Mail IncrediMail Microsoft Outlook Microsoft Windows Live Mail Mozilla Thunderbird
Developed by	Microsoft
MIME type
Useful links	More detailed information on EML files
Conversion type	EML 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

2026-01-22

We received a batch of EML files from a client and needed to review them without setting up an email client — converting to HTML let us open everything directly in the browser. Worked perfectly.

Sophie Blanchard

2026-03-30

Used this to web-archive a long email thread for our project documentation site. The HTML output preserves the original formatting well enough for publishing without extra cleanup.

Kenji Watanabe

2026-05-15

We archive email newsletters from vendors by converting EML to HTML and storing them in our intranet — the converter handles inline images and styles correctly, which many tools don't.

Nadia Kowalczyk

Rating EML to HTML

4.7 (490 votes)Rate It

Convert EML to HTML — Frequently Asked Questions ▼

What is an EML file and why convert it to HTML?

An EML file is a single email message saved in RFC 2822 format. Converting it to HTML lets you view the message in any browser without an email client, and makes it easy to embed in web pages or documentation.

Will the HTML output include images from the email?

Inline images that are base64-encoded in the EML file are preserved in the HTML output. Images that are referenced by external URLs will display only if the browser can reach those URLs.

Are email attachments converted too?

Attachments embedded in the EML file are noted in the HTML output with their filenames. The binary attachment data itself is not automatically extracted as separate files in the online converter.

Does the conversion work for HTML-formatted emails and plain-text emails?

Yes, both are supported. HTML-formatted emails retain their layout and styling. Plain-text emails are wrapped in clean HTML so they display correctly in a browser.

Can I convert EML files from Thunderbird, Outlook, or Windows Mail?

Yes. EML is a standard format and files produced by Thunderbird, Outlook (when exported), Windows Mail, and most other clients are all compatible with this converter.

Is the converted HTML file safe to open?

The output HTML reflects the content of the original email. Be cautious with HTML emails that contain external scripts or tracking pixels, as those elements will still be present in the output file.

How do I convert a folder of EML files to HTML automatically?

Total Thunderbird Converter ($29.90) handles batch conversion: TotalThunderbirdConverter.exe C:\eml_folder C:\html_output /ConvertTo html /ProcessRecursively. It processes entire directories in one command.

Convert EML to HTML Online

Developers, support teams, and archivists convert EML files to HTML to display email content in a browser or embed it in a web application without requiring an email client.

Browser-viewable output — the resulting HTML file opens in any browser with no plugins required
Preserves formatting — inline styles, images, and HTML message bodies are retained accurately
Headers included — From, To, CC, Date, and Subject are rendered at the top of the HTML document
Attachment references — attachment names are listed so you know what was sent with the message
Plain text fallback — if the EML contains only a plain-text body, the output is clean readable HTML

What Is EML?

EML is the standard file format for a single email message, defined by RFC 2822. It stores headers, body, and attachments (base64-encoded) in a plain-text container. EML files are produced by Thunderbird, Outlook Express, Windows Mail, and many web-based email export tools. Without an email client, the raw file is difficult to read due to encoded content and MIME boundaries.

What Is HTML?

HTML (HyperText Markup Language) is the language browsers use to render web pages. Converting an email to HTML produces a file that any browser can display with correct formatting, images, and layout. HTML is also the format used for embedding email previews in web applications and documentation systems.

Online Converter vs Desktop Converter

Feature	Online (this page)	Total Thunderbird Converter (desktop)
Batch conversion	✓ Single file	✓ Entire folders, recursive
File size limit	Up to 50 MB	No limit
Automation / scripting	✗	✓ Command-line, .bat, Task Scheduler
Files stay local	✗	✓ No upload required
Price	Free	From $29.90

Batch CLI example: TotalThunderbirdConverter.exe C:\eml_files C:\html_output /ConvertTo html /ProcessRecursively

How to Convert EML to HTML

Click Choose File and select your .eml file
The format is detected automatically
Select HTML as the output format
Click Convert — processing takes a few seconds
Click Download to save your HTML file
Open the file in a browser to verify that the email renders correctly

When Do You Need EML to HTML?

Web application integration — embed email previews directly in a browser-based system
Customer support documentation — save support emails as HTML files for a knowledge base
Email archiving portals — display archived messages on an internal intranet without an email client
Developer testing — inspect the HTML rendering of an email template received as EML
Sharing via link — HTML files can be hosted on a server and shared as URLs