HTML Validator
Have you ever been to a website that just doesn’t look right, and so you try a different browser (Chrome, Firefox, Internet Explorer, Safari, Opera etc) and then it looks OK? Chances are your website developer wrote your website just for that browser. An advanced web developer will make sure your website W3 standards compliant, which means that your website will look fine no matter what browser your website visitors are using. You can test to see if your website validates by entering in your website into the W3 Validator’s website.