It’s a great idea to run your Web pages through an HTML validator before you publish them on your Web site. These programs will pick up potential problems such as missing closing tags on tables, and using tags that won’t work properly on all browsers. Don’t forget – just because your page looks great in the browser you’re viewing it with doesn’t mean it will work on other browsers!
HTML validators are also a good way to learn about the correct way to use HTML tags – you can learn from your mistakes!
Some good free validators on the Web include the W3C Markup Validation Service and the WDG HTML Validator. Many modern web authoring packages have built-in HTML checkers too.
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