This w3c validator is great for when you want to know and check the markup validity of URLs in HTML, XHTML or HTML5. Using a HTML validator tool like this one can save you time and money and help you to see what URLs are in need of change and which are ok for you to use.
With this HTML validator online you can enter up to 500 URLs at once and the tool will search them all and give results quickly letting you know where there are errors that need to be fixed, use it free of charge too!
Input list. Enter URL line by line (max 500 URLs)
alert sound when done
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