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Updated article: The byte-order mark (BOM) in HTML

The article The byte-order mark (BOM) in HTML was updated significantly to reflect the fact that the byte-order mark in UTF-8 is less problematic now than it used to be, and that it has a higher precedence than the HTTP header for character encoding detection.

The article was largely rewritten, and now incorporates the relevant information that used to be in the article “Display problems caused by the UTF-8 BOM”. That article has now been decommissioned.

German, Spanish, Russian and Ukrainian translations need to be updated. Translators, please contact Richard Ishida ( for the source text.

Categories: Update, w3cWebDesign


  1. Please note that in contrary to the article and blog post Microsoft stating with IE10 gave the HTTP header a higher precedence than UTF-8 BOM which brings back various problems.

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