Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
Bad start tag in “img” in “head”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Stray end tag “noscript”.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
Attribute “rel” not allowed on element “span” at this point.
Bad value “home_slider_1-inspiracja 1” for attribute “id” on element “a”: An ID must not contain whitespace.
Bad value “3286” for attribute “rel” on element “a”: The string “3286” is not a registered keyword.
Bad value “5537” for attribute “rel” on element “a”: The string “5537” is not a registered keyword.
Bad value “2548” for attribute “rel” on element “a”: The string “2548” is not a registered keyword.
Bad value “3567” for attribute “rel” on element “a”: The string “3567” is not a registered keyword.
Attribute “tabname” not allowed on element “a” at this point.
Malformed byte sequence: “93”.
Warnings:
The “language” attribute on the “script” element is obsolete. You can safely omit it.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
This document appears to be written in Polish. Consider adding “lang="pl"” (or variant) to the “html” start tag.
Poland PL