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Asked: 2026-05-15T21:06:04+00:00

how can I replace screen resolution when accessing some site from script? Is it

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how can I replace screen resolution when accessing some site from script? Is it possible to acces such data when own script connects to the server?

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  1. Editorial Team

    To give a very definitive answer:

    • You cannot change a user’s screen resolution via the browser.
    • You cannot retrieve a user’s resolution as part of any ordinary HTTP request. (i.e.: in PHP’s $_POST superglobal)
    • You can retrieve a user’s screen resolution using JavaScript, which can then be passed back to the server via AJAX.

    As a best practice, your website should be resolution independent by means of a fixed, fluid, or elastic layout. Changing a user’s resolution is a frustrating experience for users and makes a project operate badly.

    Keep in mind, also, that many platforms cannot have their resolutions altered. Most mobile devices, embedded platforms, and video game consoles have fixed resolutions. Also, projectors and televisions usually have very specific resolutions at which they function properly, so adjusting the resolution on these devices would likely wreak havoc.

    As an alternative to adjusting screen resolution, check out em-driven layout. An em is a unit of measure in CSS that is relative to the current font. This allows you to dynamically adjust the sizing of your layout and its contents by adjusting the font size of the document (a larger font size will increase the pixel-for-pixel sizes of everything else on the page).

    It should be noted that adjusting resolution can be accomplished via ActiveX on Windows, but only after multiple security warnings (and it only works on Windows in IE). This should not be attempted under any circumstances.

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