Cryptomator Encrypts Your Files Before Uploading to Dropbox or Other Cloud-based File Storage Services

Many people are afraid to use Dropbox, Google Drive, or other file storage services because of the fear that “someone might see my personal data.” Whether the fear is valid or not can be discussed forever but there is a simple solution that always avoids the problem: encrypt everything before sending any files to the file storage service. Encrypted files cannot be read by anyone who does not know the encryption key. The result is that your private information remains private.

Of course, you could always manually encrypt the files one at a time by using any of the dozens of available encryption programs. However, if you have hundreds or thousands of files you wish to save online, encrypting them one at a time entails a LOT of work. Luckily, there is a simpler solution and, best of all, it is free.

Cryptomator provides transparent, client-side encryption for your files to be stored in the cloud. Cryptomator provides a virtual drive. You can add, edit, or remove files as you’re used to with any other disk drive. Not only do the contents of files get encrypted, even the file names and folder names get encrypted. Only the encrypted files stored in the virtual drive are sent to the file storage service. Cryptomator runs solely in your computer and does not need any infrastructure or accounts under anyone else’s control.

No other person or company has any access to your Cryptomator information. In fact, no one else will even know that you are using Cryptomator unless they have physical access to your computer. Some other file storage services may have access to your encryption keys and therefore may be able to prevent you from accessing your own data, as soon as they decide to change their terms and conditions or shut down completely. This is technically impossible with Cryptomator.

Cryptomator is available for Windows, Macintosh, and Linux. It is free and open source software, so you can rest assured there are no backdoors. Donations are accepted, however. The program will never beg you for a donation.

The biggest drawback I see to Cryptomator is there is no matching product for iPad, iPhone, or Android devices. You will not be able to retrieve and read encrypted files on those devices; you must use Windows, Macintosh, or Linux to retrieve and decrypt your files. For some people, this will be a show-stopper. Others will not care. However, you should know about that limitation and decide for yourself.

The free and open source Cryptomator program is available at:

2 thoughts on “Cryptomator Encrypts Your Files Before Uploading to Dropbox or Other Cloud-based File Storage Services

    • —> In fact there is an app for Android[1] and for iOS[2] available.

      Sort of.

      I don’t know of any apps that are exactly like Cryptomator that AUTOMATICALLY encrypt things. However, one app that is otherwise close is AES Crypt for Windows, Macintosh, and Linux at and its matching Android apps, Crypt4All, available in the Google Play Store. An Apple iOS app is also available in iTunes at

      AES Crypt is completely free open source software. The source code for AES Crypt algorithm and client software is available at AES Crypt ( ).

      A number of the cloud-based file storage services also have their own methods of encryption but these are not open source.


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