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Based on our record, W3C Markup Validation Service seems to be more popular. It has been mentiond 95 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Validate Your Code Include tools like W3C code validation service and CSS validator to ensure your code meets web standards. - Source: dev.to / about 1 month ago
===> Click here to run your code through the HTML validator. - Source: dev.to / 5 months ago
Try looking at tools like https://validator.w3.org/. Source: 5 months ago
I'm looking for either that specific validator (older version of https://validator.w3.org/) or an equivalent that can validate pre-HTML5 (DTD-based) files in a similar fashion. I would appreciate any pointers in the right direction. Thanks in advance. Source: 11 months ago
Not an addon, but maybe it helps Https://validator.w3.org/. Source: 11 months ago
Botify - Traffic Managers, SEO Managers, Webmasters:Crawl your site to extract all of its metadata and identify areas for improvement
HTML Validator - HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla.
Nibbler - Free tool for testing how good your website is, and what you can do to improve it. Check accessibility, SEO, social media, compliance and more.
Total Validator - Total Validator can check your website to help ensure that it is accessible, uses valid HTML and CSS, has no broken links, and is free from spelling mistakes.
Keyword Explorer by Moz - Find the best keywords to improve your website's SEO traffic
PageSpeed Insights - PageSpeed is addon for ...