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Editorial Team
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Asked: 2026-06-05T01:12:44+00:00

Normally UTF should be uppercased as it’s an abbreviation. However, attributes in HTML are

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Normally UTF should be uppercased as it’s an abbreviation.
However, attributes in HTML are normally lowercased.

So, should it be: <meta charset="UTF-8"/> or <meta charset="utf-8"/>?
I know both work.

Thank you.

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1 Answer

  1. Editorial Team

    The value for charset is case-insensitive.

    From spec.whatwg.org

    The charset attribute specifies the character encoding used by the document. This is a character encoding declaration. If the attribute is present, its value must be an ASCII case-insensitive match for the string "utf-8".

    Link to full document: https://html.spec.whatwg.org/multipage/semantics.html#attr-meta-charset

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