Need help? Reach us at 
+1 (855) 418-2323
Need help? Reach us at
+1 (855) 418-2323
File Converters TIFF and PDF apps Forensic FreewareThe 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.
1) Upload EML file to convert
Drop files here, or Click to select
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
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.💾 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.
| 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 |
| 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 |
2024-01-04
EML files are email messages saved in RFC 5322 format — the standard used by Outlook, Thunderbird, Apple Mail, and Gmail exports. Opening an EML requires an installed email client. Converting EML to HTML produces a self-contained web page that opens in any browser — on any device, with no Outlook, no Thunderbird, no email app required. Inline images are embedded as base64 data URIs, so the HTML file is fully portable and displays correctly offline.
EML (Electronic Mail) is a file format for storing individual email messages, defined by RFC 5322 (superseding RFC 2822 and RFC 822). An EML file is a plain-text file containing:
EML files are created when you drag an email out of Outlook or Thunderbird, export via Gmail's Google Takeout (Mbox → split to EML), or save an email in Windows Mail or Apple Mail. EML is also the output format of email forensics and eDiscovery tools.
| Property | EML (original) | HTML (this tool) | |
|---|---|---|---|
| Viewer required | Outlook / Thunderbird / Apple Mail | Any browser | Any PDF reader / browser |
| Inline images | Rendered by mail client | Embedded as base64 — self-contained | Embedded in PDF |
| Text search | Mail client index | Browser Ctrl+F — instant | PDF viewer search |
| Web embeddable | No | Yes — iframe or direct link | Limited (PDF.js) |
| Print quality | Mail client dependent | CSS print stylesheet | Pixel-perfect |
| Legal / archival | Native format (best for forensics) | Good for reference | Best for immutable records |
| Editable | Headers editable in text editor | Fully editable HTML | Not without specialist tools |
The converter parses the EML file as an RFC 5322 MIME message, extracts the text/html body part (falling back to text/plain if no HTML part exists), resolves all cid: Content-ID inline image references, base64-encodes the referenced images, and inlines them as <img src="data:image/...;base64,..."> data URIs. The result is a single self-contained HTML5 file that renders correctly in any browser without external files or a server.
Email headers (From, To, Subject, Date) are prepended as a styled header block above the message body.
