CssCompressor 1.0 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free software for Mac is Romanysoft LAB.
The program lies within Developer Tools, more precisely Webmaster Tools. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
CssCompressor is designed to help you compress CSS source files. The application reduces code size and makes your web pages load faster. The program has a very simple and easy-to-use interface. All you need to do is drop your CSS file onto the program and it will be compressed with the click of a button.
You may want to check out more Mac applications, such as Multisite for iWeb, HyperEdit or Validator-SAC, which might be similar to CssCompressor.