If you’re keen on making sure your website code is perfect, then make sure you give the W3C’s HTML and CSS validator’s a try. These free web-based tools allow you to check whether your HTML and CSS files conform to the W3C specifications.
The W3C HTML validator allows you to check any online web page or upload an offline HTML page, and will return a detailed list of where your page does not conform to standards.
The W3C CSS validator can check that you have written valid CSS in external CSS stylesheets.
Finally, the W3C Broken Links report will check for any broken links.
If you’re HTML is in a mess (!!!), check out HTMLTidy, which is available both as a web based service and as a Firefox extension. HTMLTidy will remove any empty tags, correct simple errors and indent code nicely to make it more readable.
I often get asked by budding web developers what the difference is between HTML and XHTML. The truth is, there isn’t a lot of difference between HTML 4.01 and XHTML, and most of the rules of XHTML you should be using regardless to maintain tidier code. So, if you already know HTML 4 through and through, just bear in mind the following points and you can put XHTML on your CV/resume too!
What would ever happen if HTML tags escaped their text based prison and were free to roam the real World? ‘Things You Don’t See Everyday‘ have created some funny pictures showing what those HTML tags would be doing.
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