Windows This is a Community Contributed Download

CategoryImprove Performance
LicenseFree to try
Supported byEmail, Phone, Knowledge base
Works WithIIS 5, IIS 5.1, IIS 6
DocumentationCacheRight Documentation
Updated onFebruary 5, 2009
Uploaded byport80


Speed up repeat Web site and application visits (and reduce server strain) with cache control... A 304 Not Modified Web server response is a waste of time. Why should repeat Web visitors request the same content over and over when it can be cached and accessed faster from a local browser or proxy cache? CacheRight allows developers to easily craft and administer effective cache control policies for every Microsoft IIS site resource through a single rules file -- dramatically speeding up sites and eliminating unnecessary requests for more throughput. Use CacheRight to centralize caching policies rather than creating rules in a one-off fashion via IIS, and deliver faster pages for happier customers and more productive corporate users. Cache control for many developers is limited to using the META tag or relying on the Last-Modified date for a file. Unfortunately, this technique is time consuming, fails to leverage browser and proxy caches, works poorly for HTML output, and does nothing at all for the most cache-worthy items in a site – images! With CacheRight, a simple configuration rules file in the Web site's home directory enables developers to set up rules that control expiration by file location or file type. After first access, unchanging images, PDFs, Flash, multimedia files and other page elements are delivered crisply from the repeat user's browser cache. Dynamic content is served guaranteed fresh, without competing with validation requests and static content for precious server cycles and bandwidth. Send data less often for IIS speed and Web server efficiency with CacheRight! CacheRight is available as a free 30-day trial, and, like all Port80 Software products, CacheRight includes free IIS technical support.


  • Manage all cache control rules for a site together in a single text file, promoting caching of binary objects like images, PDFs, and multimedia files
  • Requires no MMC access to apply cache control to IIS Web sites and applications
  • Improved! Intuitive, easy-to-master rule statements (a sample rules file is provided with detailed examples for developers)
  • Supports site-wide, directory, or file-based caching rules
  • Supports rules based on MIME type of requested object
  • Supports multiple virtual servers or Web sites
  • Validation tool provided for checking syntax of rule statements
  • Supports all relevant HTTP 1.0 and 1.1 cache control headers including Expires and Cache-control (max-age, public/private, and no-transform)
  • NEW! Easily block files or directories from CacheRight rule application for more granular cache control management
  • Improved! Entire ISAPI filter optimized to leverage server-side processing improvements for maximum performance, especially with httpZip for IIS compression running on the same IIS server
  • Improved! Settings Manager with user-friendly GUI for easy management and default settings for cache control on newly created sites
  • NEW! Import/export settings system to help support settings across Web farms and complex networks
  • Online diagnostic tool for checking page cacheability
  • Simple to install/uninstall


  • Dramatically reduces page load time, making for a better user experience and increased visitor retention
  • Eliminates unnecessary chatter and bandwidth on server and network due to excessive conditional GET requests and 304 responses
  • Saves time to deploy cache control by centralizing rules in one file and exposing cache control to developers, freeing up admins for other tasks


  • IIS 6.0 / Windows Server 2003 (all versions)
  • IIS 5.1 / Windows XP (not recommended for production use)
  • IIS 5 / Windows 2000
  • IIS 4 / Windows NT