Code points greater than U+007F DELETE will be converted to -percent-encoded bytes by the URL parser. +
For historical reasons, rather than storing codepoints and [=byte/percent-encoding=] +to ASCII for serialization, URLs instead store their value as ASCII internally, eagerly converting +code points greater than U+007F DELETE to [=percent-encoded bytes=] during [=URL parser|parsing=].
In HTML, when the document encoding is a legacy encoding, code points in the URL-query string that are higher than U+007F DELETE will be converted to