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We want to extend the range of supported compression formats.
About Alexander Löwenstein

I'm a nice guy.

  • I'm into file software design, compression technology and cryptography.
  • I like to build things that are easy and efficient to use. 
  • I developed the ZIP compressor xRar, that can be downloaded at http://www.xrar.org



Joined: 07 Oct, 2014


Project Description Comments


We want to enhance our ZIP file compressor "xRar" to support more compression formats. The product is currently in its 3rd Version and you can download it at https://www.xrar.org/setup.exe

xRar is a super lightweight file compression tool. We have designed it to be as easy, simple and efficient to be. Its Unique Selling Proposition is its design and ease of use:

  • Wide range of supported file formats
  • Seamless creation of self-extracting SFX's
  • Right-Click Explorer Integration
  • Strong AES256 Encryption
  • Lots of smaller innovations like a "Password Strength Preview Indicator", "Automatic Integrity Check", easy drag and drop & a visual designator on the compression ratio.

We were annoyed by the existing solutions of WinZip, that were either too commercially crowded, or WinRar, that turned out to be too complicated or expensive. xRar is our approach to an advertisment free compression & decompression tool that only does one thing: working properly - and nothing else. 


  • We started development of xRar in 2012. We have recently finished the third revision.
  • As of now, it supports the compression of ZIP and the uncompression of ZIP, ACE, RAR, ISO, 7Z, TAR, CAB, IMG, GZIP, GZ, TGZ, XZ, Z 


In the next release (V4) we want to add the following functionality:

  • Compress: 7Z, ZIPX

With these formats included the file compressor would cover 98% of the major archive formats out there that were developed between 1989 and 2014.

What you give and what you get

  • We require roughly 5.000,- USD in development costs.
  • Donate at least 5,- USD and receive the full licence of xRar that is worth 20,- USD - including a key for the next version. That's a 75% bargain!

We will use all funds raised for development.

Other ways you can assist

  • Tell others about our compressor and share the word of xRar. 
  • Visit https://www.xrar.org , download and use the latest V3 version.


Project Creator's notes
I built xRar out of love and it's fun developing something that gives back to other people :)
Risks and Challenges
It may not be possible to integrate all of the formats. Yet we will try our best to get in as much as possible.

We are going to hire a few key people on file compression technology and file encryption.
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5 €
Full Licence of the current V3 and the upcoming V4

Estimated Delivery: