IETester for Windows

Quick summary

IETester is a free, experimental browser utility that lets you run multiple Internet Explorer rendering and JavaScript engines on a single machine. It’s aimed at developers and anyone who needs to view sites using older IE behaviors while staying on legacy Windows releases like XP, Vista, 7, or Windows 8 desktop.

Engines included

• IE 5.5
• IE 6
• IE 7
• IE 8
• IE 9
• IE 10
• IE 11

Platform support

IETester works on older Windows releases (XP, Vista, Windows 7 and Windows 8 desktop), allowing those systems to emulate modern IE engines without upgrading the operating system.

Known limitations and bugs

• Flash content under the IE6 engine may require running the program with Administrator privileges to function.
• JavaScript dialog methods such as alert() and confirm() are not consistently supported.
• Navigation controls like Previous and Next can fail intermittently.
• There are additional minor quirks and incomplete features since this is an experimental tool; expect occasional instability.

Who benefits from this tool

• Web developers who need to test cross-version rendering and script behavior.
• Users who prefer older Windows versions but must access sites expecting newer Internet Explorer behavior.
• Anyone who needs a quick, free way to compare how a page behaves across different IE engines without multiple virtual machines.

Alternatives to consider

• Grabit (free) — listed as a recommended option for users looking for other utilities that help manage or test site access.