iZoom is a free Chrome add-on developed by jp-correia that automatically changes the zoom level to fit the window width. With three different zooming modes, iZoom provides users with a seamless browsing experience.

The first mode, Shrink Only, ensures that the zoom level remains at 100% unless the window width is decreased. In this case, the contents of the page are automatically shrinked to fit, avoiding the need for a horizontal scrollbar. This mode is likely the expected behavior for most users.

The second mode, Grow Only, ensures that the zoom level is never lower than 100%. It only grows the contents of the page to fit the window width, ensuring optimal readability.

The third mode, Shrink and Grow, dynamically adjusts the contents of the page to fit the window width, both shrinking and growing as needed.

iZoom also allows users to customize which addresses they want to exclude from being zoomed in or out. This option is easily accessible from the options page or through a user-friendly context menu.