This tool is an ongoing experiment in better HTML checking, and its behavior remains subject to change
Error: Bad value CSWB110\index.html for attribute href on element a: Backslash ("\") used as path segment delimiter.
From line 14, column 2; to line 14, column 30
>↩<nav>↩↩ <a href="CSWB110\index.html">CSWB11
/hello, #canvas, or http://example.org/. Characters should be represented in NFC and spaces should be escaped as %20. Common non-alphanumeric characters other than ! $ & ' ( ) * + - . / : ; = ? @ _ ~ generally must be percent-encoded. For example, the pipe character (|) must be encoded as %7C.
Error: Bad value Other\index.html for attribute href on element a: Backslash ("\") used as path segment delimiter.
From line 15, column 3; to line 15, column 29
> ↩ <a href="Other\index.html">Other
/hello, #canvas, or http://example.org/. Characters should be represented in NFC and spaces should be escaped as %20. Common non-alphanumeric characters other than ! $ & ' ( ) * + - . / : ; = ? @ _ ~ generally must be percent-encoded. For example, the pipe character (|) must be encoded as %7C.
Error: Stray end tag b.
From line 17, column 3; to line 17, column 6
↩↩ </b>↩</nav
Error: Saw < when expecting an attribute name. Probable cause: Missing > immediately before.
At line 25, column 1
v>↩<img src=""↩</main>↩↩<foote
Error: A slash was not immediately followed by >.
At line 25, column 3
↩<img src=""↩</main>↩↩<footer>
Warning: Attribute < is not serializable as XML 1.0.
From line 24, column 1; to line 25, column 7
e. </div>↩<img src=""↩</main>↩↩<foo
Error: Bad value for attribute src on element img: Must be non-empty.
From line 24, column 1; to line 25, column 7
e. </div>↩<img src=""↩</main>↩↩<foo
/hello, #canvas, or http://example.org/. Characters should be represented in NFC and spaces should be escaped as %20. Common non-alphanumeric characters other than ! $ & ' ( ) * + - . / : ; = ? @ _ ~ generally must be percent-encoded. For example, the pipe character (|) must be encoded as %7C.
Error: Attribute < not allowed on element img at this point.
From line 24, column 1; to line 25, column 7
e. </div>↩<img src=""↩</main>↩↩<foo
img:alt - Replacement text for use when images are not available
src - Address of the resource
srcset - Images to use in different situations
(e.g., high-resolution displays, small monitors, etc)
sizes - Image sizes between breakpoints
crossorigin - How the element handles crossorigin requests
usemap - Name of image map to use
ismap - Whether the image is a server-side image map
width - Horizontal dimension
height - Vertical dimension
longdesc - A url that provides a link to an expanded description of the image, defined in [html-longdesc]
Error: Attribute main not allowed on element img at this point.
From line 24, column 1; to line 25, column 7
e. </div>↩<img src=""↩</main>↩↩<foo
img:alt - Replacement text for use when images are not available
src - Address of the resource
srcset - Images to use in different situations
(e.g., high-resolution displays, small monitors, etc)
sizes - Image sizes between breakpoints
crossorigin - How the element handles crossorigin requests
usemap - Name of image map to use
ismap - Whether the image is a server-side image map
width - Horizontal dimension
height - Vertical dimension
longdesc - A url that provides a link to an expanded description of the image, defined in [html-longdesc]
Error: An img element must have an alt attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
From line 24, column 1; to line 25, column 7
e. </div>↩<img src=""↩</main>↩↩<foo
Error: End tag for body seen, but there were unclosed elements.
From line 37, column 1; to line 37, column 7
</footer>↩</body>↩</htm
Error: Unclosed element main.
From line 19, column 1; to line 19, column 6
b>↩</nav>↩<main>↩↩ <p>
Document checking completed.
Used the schema for HTML with SVG 1.1, MathML 3.0, RDFa 1.1, and ITS 2.0 support.
Used the HTML parser.
Total execution time 5 milliseconds.
About this checker • Report an issue • Version: 16.7.27