A private desk tool

Read awkward mail files, privately.

Open winmail.dat / TNEF and EML messages in this browser. Read the message, view safe inline images, preview PDFs, and download attachments without an upload.

Files never leave your device

Drop winmail.dat or EML files here

or choose them from your device

Up to 10 files · 25 MB each · 100 MB total · 300 extracted attachments

Files stay local. Anonymous task-step counting starts September 19 and never includes mail or attachment data.

Quick answer

A local reader for TNEF and EML

Mail File Viewer reads email headers and bodies, replaces embedded CID images with local previews, blocks remote images until you allow them, and keeps attachments available for individual or ZIP download.

More details about the reader
Know your file

EML and winmail.dat are different

EML is a complete email message

Open an EML here to read its sender, recipients, subject, safe body, inline images, and attachments.

winmail.dat is an Outlook TNEF package

Open it when another mail app hides the original message or attachments inside a winmail.dat wrapper.

Open the winmail.dat guide

MSG, EMLX, and MHT files are not supported.