W3C Markup Validation Service
HTML Validator
Total Validator
Rocket Validator
PageSpeed Insights
GTmetrix
Nibbler
Scrutiny
Product Disrupt
Design Principles
Colorbox.io
Laws of UX
Checklist Design
Webflow University
Interfacer
Invision
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Based on our record, W3C Markup Validation Service seems to be a lot more popular than Product Disrupt. While we know about 97 links to W3C Markup Validation Service, we've tracked only 1 mention of Product Disrupt. 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.
Looking at the html of HN's pages, can't blame them really. Running though https://validator.w3.org/ , the result is abysmal. At this rate, if web browsers started requiring sites to output HTML that is somewhere in the realm of normalcy, HN would sooner shut down than consider ever updating. - Source: Hacker News / 8 days ago
Whether you’re a frontend developer, lead, or manager, reconsider your expectations and practices if you haven’t yet chosen not to ship erroneous HTML. The more of us decide to talk about using actual HTML on our sites and in our apps, and lead by example, the better for our users and clients, and the better for our craft and profession. On the engineering side of web development, it’s HTML first—if it is HTML. - Source: dev.to / 21 days ago
Validate Your Code Include tools like W3C code validation service and CSS validator to ensure your code meets web standards. - Source: dev.to / 3 months ago
===> Click here to run your code through the HTML validator. - Source: dev.to / 6 months ago
Try looking at tools like https://validator.w3.org/. Source: 6 months ago
Product Disrupt - Curated List of Resources to Learn Product Design. Source: almost 3 years ago
HTML Validator - HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla.
Design Principles - An open source repository of design principles and methods
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.
Colorbox.io - Create accessible color systems 🎨
Rocket Validator - Site-wide Accessibility and HTML validation made easy. With a single click, Rocket Validator will check thousands of web pages on your site for Accessibility and HTML conformance, producing a detailed, actionable report on seconds.
Laws of UX - Key maxims that designers must consider when building UX