Winmail File Viewer for iOS
Winmail.dat Viewer for iPhone and iPad
Open Outlook attachments from Mail or Files and extract the documents and images inside winmail.dat on your device, even offline.
Free message viewing · Subscription or credits required for attachments
What it does
Tap the attachment in Mail, Gmail, Outlook, or Files, share it to Winmail File Viewer, then view, save, or share the PDFs, documents, spreadsheets, and images inside. Everything is decoded on-device and nothing is uploaded, so it works offline once the attachment is downloaded.
Pricing
Message viewing is free. A subscription or credits unlock attachment viewing and saving. Current prices and device requirements are on the App Store listing.
Frequently asked questions
What if the app is missing from the share sheet?
Tap More in the row of apps. You can also save the attachment to Files and share it from there.
Can I open winmail.dat without installing an app?
You can read the message in the free online viewer; the attachments need the iOS app.