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Window: resizeTo() method

Baseline

Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

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The Window.resizeTo() method dynamically resizes the window.

Syntax

resizeTo(width, height)

Parameters

width: An integer representing the new outerWidth in pixels (including scroll bars, title bars, etc.).
height: An integer value representing the new outerHeight in pixels (including scroll bars, title bars, etc.).

Examples

This function resizes the window so that it takes up one quarter of the available screen. See the Screen.availWidth and Screen.availHeight properties.

function quarter() {
  window.resizeTo(window.screen.availWidth / 2, window.screen.availHeight / 2);
}

Specifications

Specification
CSSOM View Module # dom-window-resizeto

Browser compatibility

Note: It's not possible to resize a window or tab that wasn't created by window.open(). It's also not possible to resize when the window has multiple tabs.

Note: This function might not resize the window synchronously. In some environments (like mobile) it might not resize the window at all. You can listen to the resize event to see if/when the window got resized.

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This page was last modified on Aug 21, 2026 by MDN contributors.

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