Join or Sign In

Sign in to add and modify your software

Continue with email

By joining Download.com, you agree to our Terms of Use and acknowledge the data practices in our Privacy Policy.

Clicking on the Download Now (Visit Site) button above will open a connection to a third-party site. Download.com cannot completely ensure the security of the software hosted on third-party sites.

Developer's Description

The Zend Optimizer is a free application that runs the files encoded by the Zend Encoder while enhancing the running speed of PHP applications.

For enterprise-class performance enhancement with speed-up factors approximately 10 times greater than that of the Zend Optimizer, try the Zend Accelerator, the industry's premiere PHP accelerator. The Zend Accelerator's performance enhancement technology was specifically created to help optimize the responsiveness and processing effeciency of robust, heavily trafficked PHP-based sites.

Full Specifications

What's new in version 3.3.0

  • Zend Optimizer 3 with full support for PHP 5.2


Release August 25, 2008
Date Added August 29, 2007
Version 3.3.0

Operating Systems

Operating Systems Windows NT 4, Windows 2000, Windows, Windows XP, Windows NT
Additional Requirements
  • Supported PHP versions: 4.0.5 and above (4.0.4 in previous versions of the Zend Optimizer)
  • Supported operating systems: Linux glibc 2.1 / 2.2 (e.g. RedHat 6.x/7.x, Debian 2.2, SuSE 6.4 / 7.2, Mandrake 8.1, and others), Sparc Solaris 2.x, FreeBSD 3.4 / 4.0,
  • Windows(r) NT 4.0 / 2000 / XP, Mac OSX
  • Solaris i386, & OpenBSD are supported by the Zend Optimizer 1.2.0.
  • Supported Web Servers: Apache 1.3.x, IIS 4 and 5, Zeus (using FastCGI), CGI
  • See our Compatibility Table to review compatibility issues with other products.


Total Downloads 7,667
Downloads Last Week 0
Report Software

Related Software

WampServer (64-Bit)

WampServer (64-Bit)

Microsoft Visual C++ 2005 Redistributable

Microsoft Visual C++ 2005 Redistributable



Apache Tomcat (64 bit)

Apache Tomcat (64 bit)

Best VPN Services for 2021

Best for privacy

3 months free with 1-year plan

Best for customer support

$39.99 for the first 12 months

Best for zero logs

$4.87.99/months for a 1-year plan

Best money-back guarantee

$2.99/months for a 3-year plan