W3C Markup Validation Service
HTML Validator
Total Validator
Rocket Validator
PageSpeed Insights
GTmetrix
Nibbler
Scrutiny
Design Principles
Checklist Design
Product Disrupt
Atlassian Design
Facebook Design
Laws of UX
Colorbox.io
Facebook Design Resources
W3C Markup Validation ServiceBased on our record, W3C Markup Validation Service seems to be a lot more popular than Design Principles. While we know about 95 links to W3C Markup Validation Service, we've tracked only 9 mentions of Design Principles. 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 2 months 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: 6 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: 12 months ago
Your comment is an interesting one, and I can see how it’s be helpful for some folks who are just setting out in their careers. I was asking not about style guides, but the nuanced differences between heuristics, such as NNg’s, and design principles for decision-making: https://principles.design/. Source: over 1 year ago
Principle Design is a Free Resource to learn more about designing better user interfaces and logos for your business. Access 195+ Examples and 1445 principles to learn more about design. (no-signup). Source: over 1 year ago
Http://styleguides.io/ and https://principles.design/ are worth keeping an eye on, especially for trends that come up and to see what the industry is up to. Source: over 1 year ago
Https://principles.design/ (collection, guiding ethos). Source: over 1 year ago
Https://paperform.co/blog/principles-of-design/ https://principles.design/ https://99designs.com/blog/tips/principles-of-design/. - Source: Hacker News / about 2 years ago
HTML Validator - HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla.
Checklist Design - The best UI and UX practices for production ready design.
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.
Product Disrupt - A design student's list of resources to learn Product Design
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.
Atlassian Design - Design, develop, and deliver