Winmail.dat, MSG, MHT Viewer
8.0 1K+
v3.3.0 by Letter Opener GmbH
About Letter Opener
Letter Opener (Package Name: app.letteropener) is developed by Letter Opener GmbH and the latest version of Winmail.dat, MSG, MHT Viewer 3.3.0 was updated on August 15, 2026. Winmail.dat, MSG, MHT Viewer is in the category of Productivity. You can check all apps from the developer of Winmail.dat, MSG, MHT Viewer and find 152 alternative apps to Winmail.dat, MSG, MHT Viewer on Android. Currently this app is for free. This app can be downloaded on Android 8.0+ on APKFab or Google Play. All APK/XAPK files on APKFab.com are original and 100% safe with fast download.
Open 📎 Winmail.dat, MSG, EML and MHT files easily and securely Letter Opener opens winmail.dat and MSG e-mail files as well as EML email files, right on your Android device. It also opens MHT web archives, the format browsers use for saved web pages.
Winmail.dat Viewer — what is a winmail.dat file? Someone sent you a winmail.dat or ATT00001.dat attachment and it won’t open? That happens when Microsoft Outlook or Exchange packs the message and its attachments into a single winmail.dat file. The winmail.dat viewer unpacks it instantly, so you can read the message and open or save every attachment inside.
MSG Viewer — what is an MSG file?MSG files are email messages saved from Microsoft Outlook on Windows. The MSG viewer shows you the full message on your phone — text, formatting, and attachments included — and opens Outlook’s OFT template files too.
EML Viewer — what is an EML file?EML files are saved email messages, used by apps like Apple Mail, Thunderbird, and Gmail — yet most Android phones have nothing to open an EML file with. The EML viewer displays the complete message, attachments and all, and opens Apple Mail’s EMLX files too.
MHT Viewer — what is an MHT file? An MHT (or MHTML) file is a complete web page saved as a single file, created by browsers like Chrome, Edge and Internet Explorer. The MHT viewer displays the saved page just like the original.
Your files stay private Nothing uploads to the cloud. Nothing leaves your phone. Letter Opener processes everything locally—because your emails are nobody else’s business.
Supported file types: • Outlook: winmail.dat, ATT00001.dat, .MSG, .OFT
• E-Mail files: .EML, .EMLX
• Web archive files: .MHT, .MHTM, .MHTML, .WEBARCHIVE
• Documents: .RTF
• Images: .TIFF, .TIF, .HEIC, .HEIF, .JP2, .J2K, .JPF, .JXL, .WMF, .EMF
Made with a special 😤 for winmail.dat files.
Winmail.dat Viewer — what is a winmail.dat file? Someone sent you a winmail.dat or ATT00001.dat attachment and it won’t open? That happens when Microsoft Outlook or Exchange packs the message and its attachments into a single winmail.dat file. The winmail.dat viewer unpacks it instantly, so you can read the message and open or save every attachment inside.
MSG Viewer — what is an MSG file?MSG files are email messages saved from Microsoft Outlook on Windows. The MSG viewer shows you the full message on your phone — text, formatting, and attachments included — and opens Outlook’s OFT template files too.
EML Viewer — what is an EML file?EML files are saved email messages, used by apps like Apple Mail, Thunderbird, and Gmail — yet most Android phones have nothing to open an EML file with. The EML viewer displays the complete message, attachments and all, and opens Apple Mail’s EMLX files too.
MHT Viewer — what is an MHT file? An MHT (or MHTML) file is a complete web page saved as a single file, created by browsers like Chrome, Edge and Internet Explorer. The MHT viewer displays the saved page just like the original.
Your files stay private Nothing uploads to the cloud. Nothing leaves your phone. Letter Opener processes everything locally—because your emails are nobody else’s business.
Supported file types: • Outlook: winmail.dat, ATT00001.dat, .MSG, .OFT
• E-Mail files: .EML, .EMLX
• Web archive files: .MHT, .MHTM, .MHTML, .WEBARCHIVE
• Documents: .RTF
• Images: .TIFF, .TIF, .HEIC, .HEIF, .JP2, .J2K, .JPF, .JXL, .WMF, .EMF
Made with a special 😤 for winmail.dat files.
Letter Opener 3.3.0 Update
Initial Release 🎉
Read More
Letter Opener Features
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Previous Versions
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Architecture: arm64-v8a
Screen DPI: 160-640dpi
SHA1: b9cbc8d853cbeeef8e7a385d72e876c66203d1a5
Size: 11.27 MB
What's New:
Initial Release 🎉
Variant
Arch
Version
DPI
30
August 15, 2026
Winmail.dat, MSG, MHT Viewer
3.2.1
(30)
Requires Android: Android 8.0+
Architecture: arm64-v8a
Screen DPI: 160-640dpi
SHA1: 0a25aec2deac87a90a90ae76f44288aadef53633
Base APK: app.letteropener.apk
Split APKs: config.ar, config.arm64_v8a, config.de, config.en, config.es, config.fr, config.hi, config.in, config.it, config.ja, config.ko, config.my, config.pt, config.ru, config.th, config.tr, config.vi, config.zh
Size: 9.26 MB
What's New:
Initial Release 🎉
arm64-v8a
Android 8.0+
160-640dpi
30
August 15, 2026
Winmail.dat, MSG, MHT Viewer
3.2.1
(30)
Requires Android: Android 8.0+
Architecture: armeabi-v7a
Screen DPI: 160-640dpi
SHA1: e84e6face7e044b27b72d4a0ee5f8657e6fd422b
Base APK: app.letteropener.apk
Split APKs: config.ar, config.armeabi_v7a, config.de, config.en, config.es, config.fr, config.hi, config.in, config.it, config.ja, config.ko, config.my, config.pt, config.ru, config.th, config.tr, config.vi, config.zh
Size: 8.72 MB
What's New:
Initial Release 🎉
armeabi-v7a
Android 8.0+
160-640dpi
Variant
Arch
Version
DPI
29
August 3, 2026
Winmail.dat, MSG, MHT Viewer
3.2.0
(29)
Requires Android: Android 8.0+
Architecture: arm64-v8a
Screen DPI: 160-640dpi
SHA1: 94ad0a7d6b0da660bc34fb64ea3f4f423bee57bc
Base APK: app.letteropener.apk
Split APKs: config.ar, config.arm64_v8a, config.de, config.en, config.es, config.fr, config.hi, config.in, config.it, config.ja, config.ko, config.my, config.pt, config.ru, config.th, config.tr, config.vi, config.zh
Size: 7.86 MB
What's New:
Initial Release 🎉
arm64-v8a
Android 8.0+
160-640dpi
29
August 3, 2026
Winmail.dat, MSG, MHT Viewer
3.2.0
(29)
Requires Android: Android 8.0+
Architecture: armeabi-v7a
Screen DPI: 160-640dpi
SHA1: c92c5a7fffad44fd9c8374a6911d482eb2ea4201
Base APK: app.letteropener.apk
Split APKs: config.ar, config.armeabi_v7a, config.de, config.en, config.es, config.fr, config.hi, config.in, config.it, config.ja, config.ko, config.my, config.pt, config.ru, config.th, config.tr, config.vi, config.zh
Size: 7.32 MB
What's New:
Initial Release 🎉
armeabi-v7a
Android 8.0+
160-640dpi
Variant
Arch
Version
DPI
28
July 28, 2026
Winmail.dat, MSG, MHT Viewer
3.1.0
(28)
Requires Android: Android 8.0+
Architecture: arm64-v8a
Screen DPI: 160-640dpi
SHA1: cfb444dcb55d90df2d900c206a4fe88d4cb437c8
Base APK: app.letteropener.apk
Split APKs: config.ar, config.arm64_v8a, config.de, config.en, config.es, config.fr, config.hi, config.in, config.it, config.ja, config.ko, config.my, config.pt, config.ru, config.th, config.tr, config.vi, config.zh
Size: 7.34 MB
What's New:
Initial Release 🎉
arm64-v8a
Android 8.0+
160-640dpi
28
July 28, 2026
Winmail.dat, MSG, MHT Viewer
3.1.0
(28)
Requires Android: Android 8.0+
Architecture: armeabi-v7a
Screen DPI: 160-640dpi
SHA1: 11a802ce2f37b3eb1394c8e274ec6de9dbe752db
Base APK: app.letteropener.apk
Split APKs: config.ar, config.armeabi_v7a, config.de, config.en, config.es, config.fr, config.hi, config.in, config.it, config.ja, config.ko, config.my, config.pt, config.ru, config.th, config.tr, config.vi, config.zh
Size: 6.8 MB
What's New:
Initial Release 🎉
armeabi-v7a
Android 8.0+
160-640dpi
More Information
Package Name:
Category:
Update Date:
2026-08-15
Latest Version:
3.3.0
Need Update:
Available on:
Requirements:
Android 8.0+
Report:
Safe to Download
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