Online PDF Compressor is described as 'Compress PDF files for publishing on web pages, sharing in social networks or sending by email. Unlike other services this tool doesn't change the DPI, thus keeping your documents printable and zoomable'. There are more than 25 alternatives to Online PDF Compressor, not only websites but also apps for a variety of platforms, including Windows, Mac, Windows Phone and iPad. The best alternative is Adobe Acrobat DC. It's not free, so if you're looking for a free alternative, you could try Smallpdf or PDF Reader. Other great sites and apps similar to Online PDF Compressor are Free PDF Compressor (Free), PDF Candy (Freemium), Online File Compressor (Free) and LightPDF (Freemium).
All-About-PDF is a Windows and Web application that is used to merge, split, password-protect, compress, unlock and convert PDF files to other formats such as Microsoft Word, Excel, PowerPoint, JPG and HTML.