Winmail Viewer
Open winmail.dat attachments on iPhone, iPad, and Mac — and finally see what's inside.
The winmail.dat mystery, solved
Expecting a document and got a mysterious winmail.dat instead? That file is TNEF — a Microsoft Outlook format that Mail on iPhone, iPad, and Mac can't open. Winmail Viewer decodes it in a tap and hands you everything that was really inside.
Everything hidden inside
One tap reveals the real contents of any winmail.dat — no configuration, no sign-in.
Attachments
Every file the sender attached — PDFs, images, documents, spreadsheets. Preview with Quick Look, then save or share.
The message
Subject, sender, recipients, and the full body — HTML, rich text, or plain text.
Calendar invitations
See the time, location, and recurrence, then add the event to your calendar.
Contacts
Save an enclosed contact card straight to your address book.
Tasks → Reminders
Send an enclosed to-do to Reminders, right from the app.
Native everywhere
A fast, native app for iPhone, iPad, and Mac, with full Dark Mode and Quick Look. One purchase covers all your devices.
Every language
Handles unicode and emoji filenames, decodes compressed rich-text bodies, and expands recurring invitations correctly.
Private by design
Everything happens on your device. No network connections of its own — nothing is ever uploaded.
Your mail is nobody's business
Winmail Viewer does all of its work on your device and makes no network connections of its own. Remote images and tracking pixels in message bodies are blocked before they can load.
Read the Privacy Policy →