Winmail.dat Opener

Name: Winmail.dat Opener
Rating: 2.63 (4244 reviews)
Author: Tobias Reinhardt

By: Tobias Reinhardt

Open those annoying 'winmail.dat' attachments.

Features & Capabilities

Winmail.dat Opener is a free and lightweight Chrome extension designed to effortlessly open those frustrating "Winmail.dat" email attachments. Whether you receive important documents hidden within these files, this tool lets you view, save, and share their contents seamlessly.

The extension prioritizes your privacy by processing files locally on your device without sending data to external servers, ensuring security and offline functionality. It requires minimal space (~3MB) and does not request unnecessary permissions. Supported by unobtrusive ads, it offers a smooth user experience without pop-ups or overlays. Ideal for anyone needing quick access to Winmail.dat attachments without hassle.

User Growth & Download Statistics

App Privacy & Security

By:

Tobias Reinhardt

Downloads:

4,326,767 1.32K

Rating:

2.63

(4,244) 1 new ratings

Version:

4.0.1 Last updated: 2023-11-06

Version code:

401

Creation date:

2012-10-31

Publisher country:

Permissions:

com.google.android.gms.permission.AD_ID Moderate risk
android.permission.ACCESS_ADSERVICES_AD_ID Low risk
android.permission.ACCESS_ADSERVICES_ATTRIBUTION Low risk
android.permission.ACCESS_ADSERVICES_TOPICS Low risk
android.permission.FOREGROUND_SERVICE Low risk
android.permission.INTERNET Low risk
android.permission.WAKE_LOCK Low risk
com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE Low risk
android.permission.ACCESS_NETWORK_STATE Safe
com.treinhardt.android.winmaildat.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Size:

3.98MB

Email:

ko*****@t-reinhardt.ch

URLs:

Website ,Privacy policy

Full description:

Source:

Google Play Store

Data ingested on:

2026-06-08

Compare stats and ranking:

Ranking

# 26,417 ▼ 54

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Android app. Please use these information below to contact the Android app developer.

Developed by:

Tobias Reinhardt

Google Play Store

https://play.google.com/store/apps/details?id=com.treinhardt.android.winmaildat

Email:

ko*****@t-reinhardt.ch

Website:

https://www.winmailopener.app

User Reviews

Most reviews are split: a handful of users praise the app for opening winmail.dat files easily and for its simple, clean interface, calling it a life saver when it works. However, a large number of reviews report that it often does not work, cannot open attachments, or shows errors like 'no app' or inability to locate downloaded files. The core complaints center on reliability and usability issues, with some devices or cases not supported. Overall, the app can help some users but is unreliable for many.

Pros

Opens winmail.dat files (including from Thunderbird)
Simple and easy to use
Does what it's supposed to do
Life saver / very helpful when it works
Clean and straightforward interface

Cons

Frequent non-functionality; often does not work or cannot open attachments
Errors like 'no app' when tapping files or inability to locate downloaded files
Hard to operate / usability is poor
Some files or attachments not supported (e.g., misidentified as winmail.dat)
Perceived reliability issues; inconsistent behavior across devices

Recent reviews

Does what it's supposed to do! Thank you developer!

Pa*****, 2026-01-08

good application

K *****, 2025-12-20

Works well, so far. The only thing that feels superfluous is having to grant access rights for the same folder every time you save an attachment. As for ads, I'd rather pay for an ad-free premium version.