Based on our record, W3C Markup Validation Service seems to be a lot more popular than tota11y. While we know about 95 links to W3C Markup Validation Service, we've tracked only 1 mention of tota11y. 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.
Here's a project page for a tool on github from Khan academy: https://khan.github.io/tota11y/. Source: almost 2 years ago
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 / 4 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: 10 months ago
Not an addon, but maybe it helps Https://validator.w3.org/. Source: 11 months ago
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.
HTML Validator - HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla.
accessiBe - Making websites accessible to people with disabilities
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.
Koa11y - Automatically detect accessibility (a11y) issues on webpages
PageSpeed Insights - PageSpeed is addon for ...