EML viewer online

Safe & Secure Platform to read EML Files

🔒 Your data stays safe on your device, and previews happen in your web browser

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EML Reader is a free online tool that lets you instantly open and read EML email files right in your browser. View full message details, sender and recipient info, and attachments in a clean, readable layout. Simply drag and drop one or more EML files — no setup, no waiting. Everything runs locally in your browser, so your emails stay completely private and secure.

How to Use Online EML Viewer

📤 Upload Your EML File Click “Upload” or drag-and-drop your .eml file. Supports Thunderbird, Gmail, Apple Mail, Windows Mail exports.

📨 View Email Message See sender, recipients, subject, date, message body with HTML formatting, and full email headers — exactly as sent.

📎 Access Attachments & Headers Download all file attachments. Inspect full headers for tracking, spam analysis, or forensic investigation.

💾 Export or Convert Save as PDF for archiving, convert to MSG for Outlook, or extract attachments. All processing happens in your browser.

Multi-Platform Support

platforms

You can use our reader on all major operating systems with a stable internet connection.

Cloud Based

There is no need to install any software to view EML files with CoolUtils. Simply access the internet, and you can easily preview 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

Viewing EML files has never been so simple. Our intuitive interface lets you preview files in just a few clicks.

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.

Free Desktop Viewers

View files offline — no internet required. 100% free, no trial limits.

🗎 PDF Viewer Open & read PDF files Free Download 📄 XML Viewer Browse XML structure Free Download 📩 Mbox Viewer Read Mbox mail archives Free Download 🖨 PCL Viewer View PCL print files Free Download 📧 Mail Viewer Open EML & MSG emails Free Download

Why choose our Free Online EML Viewer?

No installation, no hassle

Open .EML messages right in your browser — no setup, no EXE, no plugins. Just upload the file and read it instantly. You don’t have to install any desktop viewer or “portable” utility.

Works everywhere

Mac, Windows, Linux, Chromebook, Ubuntu — if it has a browser and internet, it can open your EML. You can even view emails from a phone or tablet. No Outlook, no Thunderbird required.

Instant preview of your emails

Drag & drop an EML file — get a clean preview in seconds. The viewer shows the full message body, headers, and formatting, directly in the browser. No waiting for a download or import.

Simple, even for non-technical users

The interface is clean and straightforward. You don’t need IT skills — just choose a file and view it. The flow is step-by-step: upload → preview → read. That’s it.

Attachments and metadata included

See every detail of the email: sender, recipient, subject line, date and time, and more. Attachments are not ignored — you can view the message and also download attached files separately.

Need More Than Viewing?

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FAQ ▼

What is an EML file?

An EML file is an email message saved in the standard format used by many email clients such as Outlook Express, Thunderbird, and Apple Mail. It contains the full content of an email, including sender, recipients, subject, body text, and attachments. With Coolutils Online EML Viewer, you can open these files instantly in your browser without installing any software.

How do I open an EML file online?

To open an EML file online, visit the Coolutils Free EML Viewer page, upload your email file, and click "View." In just a few seconds, you'll see the full message text, sender and recipient details, and any attachments directly in your browser. No setup or additional programs required.

Can I view attachments from EML files?

Yes, the Coolutils Online EML Viewer not only displays the email message but also shows a list of all attachments. You can preview or download them individually Ч whether they are images, PDFs, or documents Ч with just one click, without needing any email software installed.

Is Coolutils EML Viewer secure?

Yes, it's completely safe. All files are transferred via a secure HTTPS connection and automatically deleted from our servers within 24 hours. We never share or analyze your data, so you can view even sensitive or business emails with confidence and privacy.

What is the Online EML Viewer?

The Online EML Viewer is a free web tool that lets you open and read EML files directly in your browser without installing email software like Thunderbird, Outlook, or Apple Mail.

Which email programs create EML files?

EML files are created by Mozilla Thunderbird, Windows Mail, Windows Live Mail, Apple Mail, eM Client, The Bat!, and Gmail (when exporting emails). It's the universal email format, unlike MSG which is Outlook-specific. EML works across different email platforms and operating systems.

What's the difference between EML and MSG files?

EML is a universal text-based standard (MIME) supported by most email clients. MSG is Microsoft Outlook's proprietary binary format. EML files are more portable and can be opened by many programs, while MSG files require Outlook or specialized viewers. Both store emails with attachments.

Can I view email headers in EML files?

Yes, the online viewer displays complete email headers including routing information, SMTP servers, SPF/DKIM authentication, IP addresses, and delivery timestamps. Essential for spam analysis, email forensics, troubleshooting delivery issues, or legal investigations.

How do I convert EML to PDF or other formats?

Most online EML viewers offer conversion to PDF (for archiving and printing), MSG (for Outlook users), HTML (for web viewing), or TXT (plain text). Export emails to universal formats for easier sharing, legal discovery, or importing to different email systems.

Convert from EML

Using CoolUtils, it is possible to convert EML files to a variety of other formats: