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Editorial Team
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Asked: 2026-05-12T10:46:32+00:00

If I’ve tested my pages in most major browsers, why would I need to

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If I’ve tested my pages in most major browsers, why would I need to maintain a validated code? I want to use box-shadows and corner radius if they’re supported in WebKit browsers and Firefox. I don’t care if they don’t show up on Internet Explorer. But I keep my HTTP requests down by not including images instead.

Are there are advantages to valid code? In SEO or otherwise?

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1 Answer

  1. Editorial Team
    • Google prefers it so it is good for SEO.
    • It makes your web page more likely to work in browsers you haven’t tested.
    • It allows you to generate or use your page as an XML document.
    • It makes you look more professional (to some developers at least)
    • Compliant browsers can render XHTML faster than HTML in quirks mode.
    • It points out a bunch of obscure bugs you’ve probably missed that affect things you probably haven’t tested e.g. the codepage or language set of the page.
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