NoEval is a free Chrome extension developed by Keller that aims to improve online security by disabling the window.eval() function on all websites. This extension also disables similar approaches to eval() when the input argument's type is a string.

When eval or similar methods are used on websites, users can be at risk in terms of security. NoEval provides a simple solution to this problem by preventing the execution of eval() and similar methods.

To enable or disable the extension, users can easily access the toolbar popup and toggle the button on the left side. It is important to note that reloading all open tabs is necessary for the changes to take effect.

NoEval is a valuable tool for those concerned about their online security and looking to mitigate potential risks associated with the use of eval() in websites.