Markup Validation Service
Check the markup (HTML, XHTML, …) of Web documents
Markup Validation Service
Check the markup (HTML, XHTML, …) of Web documents
The following notes and warnings highlight missing or conflicting information which caused the validator to perform some guesswork prior to validation, or other things affecting the output below. If the guess or fallback is incorrect, it could make validation results entirely incoherent. It is highly recommended to check these potential issues, and, if necessary, fix them and re-validate the document.
Byte-Order Mark found in UTF-8 File.
The Unicode Byte-Order Mark (BOM) in UTF-8 encoded files is known to cause problems for some text editors and older browsers. You may want to consider avoiding its use until it is better supported.
The document located at <https://upload.wikimedia.org/wikipedia/commons/e/e5/CelticCross.svg> was successfully checked as SVG 1.1 + URL + HTML + MathML 3.0. This means that the resource in question identified itself as "SVG 1.1 + URL + HTML + MathML 3.0" and that we successfully performed a formal validation of it. The parser implementations we used for this check are based on Compound XML and libxml2 (XML).
If you would like to create a link to this page (i.e., this validation result) to make it easier to revalidate this page in the future or to allow others to validate your page, the URI is <http://validator.w3.org/check?uri=https%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Fe%2Fe5%2FCelticCross.svg;ss=1> (or you can just add the current page to your bookmarks or hotlist).
If you use CSS in your document, you can check it using the W3C CSS Validation Service.
Below is the source input I used for this validation:
