Langwitches.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Malformed byte sequence: “e2”, “80”.
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Attribute “rel” not allowed on element “img” at this point.
Bad value “new yaers 2009!” for attribute “id” on element “div”: An ID must not contain whitespace.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “” for attribute “id” on element “h3”: An ID must not be the empty string.
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