line 2 column 1 - Warning: missing declaration line 2 column 1 - Warning: inserting implicit line 3 column 17 - Warning: discarding newline in URI reference line 2 column 1 - Warning: inserting missing 'title' element line 3 column 17 - Warning: escaping malformed URI reference line 3 column 17 - Warning: lacks "alt" attribute Info: Document content looks like HTML5 6 warnings, 0 errors were found! URIs must be properly escaped, they must not contain unescaped characters below U+0021 including the space character and not above U+007E. Tidy escapes the URI for you as recommended by HTML 4.01 section B.2.1 and XML 1.0 section 4.2.2. Some user agents use another algorithm to escape such URIs and some server-sided scripts depend on that. If you want to depend on that, you must escape the URI by your own. For more information please refer to http://www.w3.org/International/O-URL-and-ident.html The alt attribute should be used to give a short description of an image; longer descriptions should be given with the longdesc attribute which takes a URL linked to the description. These measures are needed for people using non-graphical browsers. For further advice on how to make your pages accessible see http://www.w3.org/WAI/GL. . You may also want to try "http://www.cast.org/bobby/" which is a free Web-based service for checking URLs for accessibility. About HTML Tidy: https://github.com/htacg/tidy-html5 Bug reports and comments: https://github.com/htacg/tidy-html5/issues Or send questions and comments to: https://lists.w3.org/Archives/Public/public-htacg/ Latest HTML specification: http://dev.w3.org/html5/spec-author-view/ Validate your HTML documents: http://validator.w3.org/nu/ Lobby your company to join the W3C: http://www.w3.org/Consortium