(sometimes we provide two download links because it may happen that the main server / link is overloaded or slow or non responding - the files are identical. Just choose one, save to the Desktop, double click to install)
Disclaimer: to our best knowledge this download comes from a website that is
safe (the last time we checked it, it was), but for your peace of mind (and better safe than sorry) we advise you to run an
antivirus on the downloaded file. Do not rely on MSWindows, Internet explorer, or on the electronic signature: a unsigned download is usually as safe as a signed one, signed just means the author paid Microsoft or Verisign for a stamp, it does not mean verified. Please kindly
report us problems with detail (click here to report), if any.
ISAPIZip is an ISAPI plugin for Internet Information Server (IIS) that compresses data on the fly when requested by users - without any client software. The end result is that not only do pages on the website load faster, but the use substantially less bandwidth than before.
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Increase the performance of a webserver while reducing the bandwidth required.)

ISAPIZip is an add-on for Microsoft Internet Information Server (IIS) or any webserver that supports ISAPI filters, that drastically reduces the amount of bandwidth required to deliver content from the web server. By reducing the size of the pages by up to 90%, it not only delivers faster loading pages, but also reduces the (bandwidth) cost of serving the content. ISAPIZip offers different levels of compression and supports all modern web content, including script pages (PHP, ASP etc.) as well as streaming content, SSL content, PDF files, XML and more. The compression settings can be customized based on paths, extensions, wildcards, MIME type or even on a per-page basis, providing you with a high level of flexibility. The program offers an easy-to-use configuration interface that runs independent from the MMC, eliminating the chance to cause problems with the rather sensitive management console - all changes made to the configuration can be applied instantly without the need to restart the webserver. Additional features include performance, bandwidth, and compression reporting, support for GET and POST data and more.
isapi program, server program, http program, compression program, performance program, gzip program