This program is designed to compress your large PDF files, but it is unable to deliver its promise. PDF Compress offers a straight-ahead interface with a few standard buttons and input boxes that allow you to select files and modify its information. After selecting the PDF file you want to compress, you can easily view the properties--such as the author, PDF version used, and the last modification date--without doing a thing. In our tests, it didn't perform well and wasn't able to reduce the size of our test documents as we expected. The publisher's description doesn't explicitly tell the compression rate and the algorithm it uses, making it hard for us to vouch for its effectiveness. We even can't restore the compressed PDF files to their original sizes due to lack of a decompression feature. With the flaws mentioned (and despite its freeware status), PDF Compress isn't a good choice for PDF file size reduction.