Winmail.dat Opener
Free App
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About Winmail.dat Opener
"Winmail.dat Opener" is a free app to open those pesky 'winmail.dat' attachments. This app is free of charge and fully functional, giving you access to the files without any need for further in-app purchases. The optional in-app-purchase will remove ads.
HOW TO OPEN A WINMAIL.DAT FILE:
You have two options:
1.) Select "Winmail.dat Opener" from the context menu of the winmail.dat attachment in your email client. This option does not work with all Android email apps as some do not allow a fine enough attachment-to-application mapping. If there is no "Winmail.dat Opener" in the context menu you have to use the second option.
2.) Save the winmail.dat attachment somewhere on your phone and start the "Winmail.dat Opener" app. The built-in file dialog will open and you can then select the previously saved winmail.dat file.
Once the ‘contained files’ list is displayed, you can open a file in a viewer by tapping it. If you want to save the extracted file you can long tap it.
WHY DOES THE APP REQUIRE A PERMISSION TO CONNECT TO THE INTERNET?
This app will extract the winmail.dat on your phone/tablet. Ordinarily, the extraction process wouldn’t require internet connection but as our app is ad supported, it will ask for permission for internet access.
THE APP CAN'T OPEN MY .DAT FILE:
Kindly note that not every file ending with ".dat" is a winmail.dat file. There are quite a lot of file formats which also use the .dat extension. So, before submitting a one-star review stating that our app didn’t work, please ensure that your file is indeed a winmail.dat (TNEF) file.
THERE ARE NO FILES IN THE WINMAIL.DAT FILE:
Microsoft Outlook does not only store attachments into a winmail.dat file, it also sometimes saves style and formatting informations. In those cases you will get an winmail.dat file which does not contain any additional files. If the winmail.dat file is rather small (less than 20KB) it is rather likely that it contains no files.
HOW TO OPEN A WINMAIL.DAT FILE:
You have two options:
1.) Select "Winmail.dat Opener" from the context menu of the winmail.dat attachment in your email client. This option does not work with all Android email apps as some do not allow a fine enough attachment-to-application mapping. If there is no "Winmail.dat Opener" in the context menu you have to use the second option.
2.) Save the winmail.dat attachment somewhere on your phone and start the "Winmail.dat Opener" app. The built-in file dialog will open and you can then select the previously saved winmail.dat file.
Once the ‘contained files’ list is displayed, you can open a file in a viewer by tapping it. If you want to save the extracted file you can long tap it.
WHY DOES THE APP REQUIRE A PERMISSION TO CONNECT TO THE INTERNET?
This app will extract the winmail.dat on your phone/tablet. Ordinarily, the extraction process wouldn’t require internet connection but as our app is ad supported, it will ask for permission for internet access.
THE APP CAN'T OPEN MY .DAT FILE:
Kindly note that not every file ending with ".dat" is a winmail.dat file. There are quite a lot of file formats which also use the .dat extension. So, before submitting a one-star review stating that our app didn’t work, please ensure that your file is indeed a winmail.dat (TNEF) file.
THERE ARE NO FILES IN THE WINMAIL.DAT FILE:
Microsoft Outlook does not only store attachments into a winmail.dat file, it also sometimes saves style and formatting informations. In those cases you will get an winmail.dat file which does not contain any additional files. If the winmail.dat file is rather small (less than 20KB) it is rather likely that it contains no files.
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Android app
App History & Updates
What's Changed
Chinese translation added.
Crashes fixed.
Chinese translation added.
Crashes fixed.
More downloads Winmail.dat Opener reached 500 000 - 1 000 000 downloads
More downloads Winmail.dat Opener reached 100 000 - 500 000 downloads
More downloads Winmail.dat Opener reached 50 000 - 250 000 downloads
More downloads Winmail.dat Opener reached 10 000 - 50 000 downloads
What are users saying about Winmail.dat Opener
G
by G####:
by G####:
So far works fine on my Galaxy Tab 4 but still trying to get it working on my iPad Air 2. Probably just a setting issue, Apple is funny like that. The wide range of reviews is perplexing.
J
by J####:
by J####:
I couldn't find a way to change the app which is used to view the text document. You get one chance, choose the wrong one and you are screwed.
H
by H####:
by H####:
Didn't work like it said it would
Q
by Q####:
by Q####:
Does exactly what it says
Q
by Q####:
by Q####:
Exactly what I needed
N
by N####:
by N####:
Good
Q
by Q####:
by Q####:
Useless.
I
by I####:
by I####:
Stinks
Q
by Q####:
by Q####:
its less clunky than the other one. when you click on save or open it unzips file to the SD card and luckily/cleverly it takes you automatically to the sdCard location so you can easily click on the file to open. i just wish it would automatically open the doc/file upon its first click without having to go to the SD card. the other winmail.dat program just saved in the SD Card but makes you drill down to it, which is stupid and cumbersom,e and time wasting. this one is better for that reason that it takes you directly to the SD Card location automatically. 5 stars if it can open automatically upon clicking attachment without need to to go sdcard.
Q
by Q####:
by Q####:
Great little tool that works as it should to decompose and open winmail.dat files often contained in emails. For those that cant open the extracted file without saving to SD card, try long press on the file, it opens right up on my Samsung Galaxy Nexus
Q
by Q####:
by Q####:
I didn't want to email my client back with the news that his winmail.dat file wasn't readable. I installed this in 30 seconds and opened the file without issue. Thank you.
Y
by Y####:
by Y####:
Not sure why I even gave it one star. This app is useless!
Q
by Q####:
by Q####:
Oops there was a problem...oops there was a problem.. Oops there was a problem... Bullshit
Q
by Q####:
by Q####:
Says it can't find the winmail.dat file... Every time.
Q
by Q####:
by Q####:
Is a bit confusing to use but it works
Q
by Q####:
by Q####:
Tried to open .dat file and app crashes. Uninstalled.
B
by B####:
by B####:
I use this with K9 Email app. No longer have to Bluetooth the dat file to my pc to open. Yay!
R
by R####:
by R####:
Don't waste your time.
Q
by Q####:
by Q####:
Does everything I expected. Thanks!
Q
by Q####:
by Q####:
It opens my school newsletters that are sent as .dat files
Q
by Q####:
by Q####:
Can this edit the .dat files as well
Q
by Q####:
by Q####:
No let me open .dat
N
by N####:
by N####:
No matter how I try to invoke it, or which file I try to open, it gives the message "Could not find any attachment/file." It was supposed to download the attachment to winmaildatopener folder, but there is no such folder. Perhaps this is because the HTC One does not use an SD card; several of the comments say it puts its files there. Anyway, it just does not work at all - uninstall.
L
by L####:
by L####:
Maybe im doing something wrong...but i click on 'winmail' email attachment and it says "fetching attachment" and shows a loading bar but stays at 0% and goes away after a few seconds. Never downloads it.
N
by N####:
by N####:
The app crashes as soon as I open the dat file.
N
by N####:
by N####:
Buffer overflow error on all files I tried to open.
Q
by Q####:
by Q####:
Dose not work
A
by A####:
by A####:
Can't open a winmail.dat file and crashes every time I try. Worthless.
V
by V####:
by V####:
Worked great until I upgraded to lollipop. Now I get an error message when I try to open a file.
D
by D####:
by D####:
Install the app but it does not open the attachments from my default android mail app. Before it did.
N
by N####:
by N####:
Is good some time,but is not always opening winmail.dat I tryied several times to re install but doesn't work.
N
by N####:
by N####:
very useful echo others comments about direct opening to get 5*
N
by N####:
by N####:
Cannot access my saved extractions. Using Galaxy S3
N
by N####:
by N####:
It really works!
D
by D####:
by D####:
Great app. Worked on my HTC Amaze 4G. Works well on my Nexus 7. Have upgraded to a HTC One M8 and it does not work. Any suggestions? Thanks. After checking further, the problem was being caused by lollipop 5.0.1. After changing my e-mail program from the resident program to a third party program, all is well.
K
by K####:
by K####:
Not sure why I even gave it one star. This app is useless!
D
by D####:
by D####:
Works great for me. Opened all of my PDF files from winmail.dat as advertised
T
by T####:
by T####:
Not worth a flip. It opens the winmail.dat file but doesn't offer a way to open the *.xlxs or *.pdf files therein.
X
by X####:
by X####:
it help me to read attachments
by H####:
It used to work perfectly on my Galaxy s5. As soon as you hit preview button it would open the dat file in the app. Now on Galaxy s7 the only way to work it is to save the file and then look for it through the app. Very painful and time wasting process. Any thoughts on this???