Nbclearn.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “charset” attribute on a “meta” element found after the first 1024 bytes.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).
Duplicate attribute “alt”.
Character reference was not terminated by a semicolon.
A numeric character reference expanded to the C1 controls range.
Bad value “108px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.
Bad value “175px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.
No space between attributes.
Forbidden code point U+0097.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “dialog”.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
Empty heading.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “dialog” was here.
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