Best .dat Viewer Apps

247+ iOS apps curated and reviewed

3.7 avg rating
19 free apps
Updated August 2026

Out of 247+ .dat viewer apps on iOS, 19 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top .dat Viewer Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Winmail Viewer - Letter OpenerWinmail Viewer - Letter OpenerFree4.8★ (4.8K)NoYesAug 2026
2Winmail Viewer:for DAT,XPS,MSGWinmail Viewer:for DAT,XPS,MSGFree2.0★ (1)NoYesMay 2026
3Any: File Explore & ViewerAny: File Explore & ViewerFree4.4★ (153)YesYesAug 2026
4Winmail.dat Viewer & OpenerWinmail.dat Viewer & OpenerFree was $1.995.0★ (5)NoYesAug 2026
5Winmail Viewer – DAT OpenerWinmail Viewer – DAT OpenerFree4.7★ (17)NoYesAug 2026
6Winmail File Viewer & OpenerWinmail File Viewer & OpenerFree4.1★ (86)NoYesAug 2026
7Dat File Viewer. Open Dat FileDat File Viewer. Open Dat File$3.991.0★ (1)NoNoAug 2026
8MailFolio: MSG & EML ViewerMailFolio: MSG & EML ViewerFreeNoYesAug 2026

Top Picks for .dat Viewer

Winmail Viewer - Letter Opener#1

Winmail Viewer - Letter Opener by Letter Opener GmbH

Open Email, MSG & XPS files
Editor's Choice
🔧 Utilities
4.8(4.8K ratings)
FreeIn-App Purchases
Winmail Viewer - Letter Opener screenshot 1
Winmail Viewer - Letter Opener screenshot 2
Winmail Viewer - Letter Opener screenshot 3
Winmail Viewer - Letter Opener screenshot 4

Easily open and view Winmail.dat, MSG, and XPS email files that are incompatible with most email clients. Convert embedded content like appointments and notes into native iOS formats, and access all attachments within these files.

Winmail Viewer:for DAT,XPS,MSG#2

Winmail Viewer:for DAT,XPS,MSG by 浩 宋

RAR, Winmail.dat Reader, TNEF
Strong Contender
📊 Productivity
2.0(1 ratings)
FreeIn-App Purchases
Winmail Viewer:for DAT,XPS,MSG screenshot 1
Winmail Viewer:for DAT,XPS,MSG screenshot 2

This tool allows users to extract, view, and save the contents of winmaildat, msg, and xps files. It provides a complete solution for managing these file types, including viewing all attachments and rich text messages.

Any: File Explore & Viewer#3

Any: File Explore & Viewer by Phuoc Thanh Cao

Explore, Search, View Files
Worth Considering
🔧 Utilities
4.4(153 ratings)
FreeAdsIn-App Purchases
Any: File Explore & Viewer screenshot 1
Any: File Explore & Viewer screenshot 2
Any: File Explore & Viewer screenshot 3
Any: File Explore & Viewer screenshot 4

This app provides comprehensive file management for iPhones and iPads, allowing users to view, share, and organize documents, media, and contacts. It supports a wide range of file formats and offers features like multi-window support and WiFi sharing.

More .dat Viewer apps to explore

4
Winmail.dat Viewer & Opener
Winmail.dat Viewer & Opener
Winmail.dat Viewer & Opener
Winmail.dat Attachment Reader
Free
$1.99 | 100% OFF

Easily open and extract attachments from Winmail.dat, .msg, and .oft email files directly on your device. This utility offers a private, offline solution with a one-time purchase, ensuring your data never leaves your phone.

Open winmail.dat (TNEF) filesOpen Outlook .msg and .oft filesExtract attachments (photos, PDFs, Word, Excel)
🔧 Utilities
(5)
paid
5
Winmail Viewer – DAT Opener
Winmail Viewer – DAT Opener
Winmail Viewer – DAT Opener
Open Winmail.dat & MSG Files
Free

Effortlessly open and view various email attachment formats, including Winmail.dat and MSG files. Extract embedded documents and images, and manage your files with integrated storage. Supports a wide range of email and document types for seamless access.

Open Winmail.dat, MSG, OFT, XPS/OXPS, and EML filesExtract attachments like PDFs and Office documentsView formatted messages with original layout
🔧 Utilities
(17)
freemium
6
Winmail File Viewer & Opener
Winmail File Viewer & Opener
Winmail File Viewer & Opener
Extract files from winmail.dat
Free

Easily open and extract attachments from winmail.dat files on your Apple devices. This app decodes TNEF files, allowing you to view and save hidden email attachments like PDFs and images directly to your device.

Open winmail.dat / TNEF filesExtract hidden email attachmentsPreview common file types
💼 Business
(86)
free with in-app purchases
7
Dat File Viewer. Open Dat File
Dat File Viewer. Open Dat File
Dat File Viewer. Open Dat File
View Dat Video, Image, Audio
$3.99

Easily open and view .dat files in various formats, including video, audio, text, and PDF. Convert your .dat files locally and offline without needing an internet connection. Select the desired file type and open your .dat content seamlessly.

Open DAT files in any formatView DAT videosConvert DAT to Excel, CSV, Text, Audio, Image, Video, PDF
🔧 Utilities
(1)
paid
8
MailFolio: MSG & EML Viewer
MailFolio: MSG & EML Viewer
MailFolio: MSG & EML Viewer
Open Winmail.dat & Mail Files
Free
💼 Business
(0)
9
Dat Unpack - Winmail Viewer
Dat Unpack - Winmail Viewer
Dat Unpack - Winmail Viewer
Open, Extract Winmail Files
Free
📊 Productivity
(0)
10
Winmail Viewer - TNEF Opener
Winmail Viewer - TNEF Opener
Winmail Viewer - TNEF Opener
Open winmail.dat attachments
Free
🔧 Utilities
(0)
11
Winmail.dat Opener & Viewer
Winmail.dat Opener & Viewer
Winmail.dat Opener & Viewer
Open Winmail.dat Files Easily
Free
🔧 Utilities
(0)
12
Eyenet Viewer
Eyenet Viewer
Eyenet Viewer
by Kyu Seo
Free
💼 Business
(0)
13
Winmail.Dat Opener · Win Dat
Winmail.Dat Opener · Win Dat
Winmail.Dat Opener · Win Dat
Open Win Mail Dat File, Windat
Free
📊 Productivity
(0)
14
K-Viewer
K-Viewer
K-Viewer
by Soogoog Lim
Free
💼 Business
(0)
15
Shine3D - Pro 3D Viewer
Shine3D - Pro 3D Viewer
Shine3D - Pro 3D Viewer
3D Viewer & Visual Capture
Free
🛠️ Developer Tools
(0)
16
RLD Viewer
RLD Viewer
RLD Viewer
by Real Life Data, Inc.
Free
📊 Productivity
(0)
17
OpenDXF
OpenDXF
OpenDXF
DXF Viewer & Dimensioning
Free
🔧 Utilities
(0)
18
STEP Viewer
STEP Viewer
STEP Viewer
Fast STEP File Viewer
Free
📊 Productivity
(0)
19
CDR Viewer Plus
CDR Viewer Plus
CDR Viewer Plus
One-click to X4 X5 X6 X7...
Free
$1.99 | 100% OFF
🎨 Graphics & Design
(0)
20
GTC Cam Viewer
GTC Cam Viewer
GTC Cam Viewer
by Global Top Centronic Bhd
Free
💼 Business
(0)

FAQ about .dat Viewer

What are the best .dat viewer apps for iPhone?
Winmail Viewer - Letter Opener tops our .dat viewer apps ranking as of August 2026, with a 4.8-star average from 4.8K App Store ratings, and it's free to download.
Yes — 19 of the top .dat viewer apps we rank are free to download, including Winmail Viewer - Letter Opener and Winmail Viewer:for DAT,XPS,MSG.
Winmail Viewer - Letter Opener has no ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 247+ .dat viewer apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
This app allows you to open and view Winmail.dat, MSG, and XPS email files that are typically unreadable by other email applications. It converts embedded content like appointments and notes into formats compatible with your iOS device and provides access to all attachments.
Simply tap on the Winmail.dat file when you receive it, and the app will open it automatically. It then processes the file to make its content accessible, including any attachments or embedded items like calendar events.