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W3C Markup Validation Service

Validates HTML markup of web pages, one at a time.

W3C Markup Validation Service

W3C Markup Validation Service Reviews and details

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  • W3C Markup Validation Service Landing page
    Landing page //
    2019-08-30

Features & Specs

  1. Standards Compliance

    The W3C Markup Validation Service ensures that your web pages conform to established web standards, helping to improve web interoperability and accessibility.

  2. Error Identification

    The service identifies errors and warnings in your HTML and XHTML documents, making it easier to debug and fix these issues to improve code quality.

  3. Improved Compatibility

    By validating your markup, you can better ensure that your web pages are compatible with various browsers and devices, providing a more consistent user experience.

  4. Free of Charge

    The validation service is provided by W3C at no cost, making it an accessible tool for developers of all levels to enhance their web projects.

  5. Educational Tool

    For beginners in web development, the W3C Validator can serve as an educational resource by highlighting common mistakes and promoting best practices in coding.

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Videos

A Walkthrough the W3C Markup Validation Service

Social recommendations and mentions

We have tracked the following product recommendations or mentions on various public social media platforms and blogs. They can help you see what people think about W3C Markup Validation Service and what they use it for.
  • HTML Validation
    How to use HTML Validation service 👇 Step 1: Access the HTML validator ● Open the HTML validator in your web browser i.e go to https://validator.w3.org/. - Source: dev.to / 2 months ago
  • WebKit Fix: Quirk News.Y Combinator to Skip TextAutoSizing
    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 / 9 months ago
  • We Need to Talk More About Conformance, If We Want to Stop Fantasy HTML
    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 / 10 months ago
  • What is cross-browser compatibility, and why should you care?
    Validate Your Code Include tools like W3C code validation service and CSS validator to ensure your code meets web standards. - Source: dev.to / 12 months ago
  • What You Need to Know About Domain and Hosting
    ===> Click here to run your code through the HTML validator. - Source: dev.to / about 1 year ago
  • Is my code good ?I'm a beginner
    Try looking at tools like https://validator.w3.org/. Source: over 1 year ago
  • Searching for the *old* W3C XHTML/CSS validator or something of equivalent functionality
    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: over 1 year ago
  • Is there an addon that will allow me to see CSS errors in the HTML and CSS?
    Not an addon, but maybe it helps Https://validator.w3.org/. Source: almost 2 years ago
  • SEO issues with React/NextJs
    Issues like missing h1 and the like: this most probably has nothing to do with react / next. Make sure your html structure is correct and elements are used correctly. Check here https://validator.w3.org/. Source: almost 2 years ago
  • (HTML) Can someone tell me what’s wrong with this code? It says I’m doing it wrong but it looks right to me
    Https://validator.w3.org/ Try pasting your html into a validator when you’re stuck, helpful to debug. Source: almost 2 years ago
  • Help Please :')
    Can't help you on the bootstrap side, but run your HTML and CSS through https://validator.w3.org/ to see what errors in your code you might be able to correct. Source: almost 2 years ago
  • Nav not displaying correctly in Safari
    I would run the code through a W3C validator to see if all is correct https://validator.w3.org/. Source: about 2 years ago
  • Need help with HTML
    I would suggest you to use a HTML validator. A quick google search will show you a few of them. The first result most likely will be a https://validator.w3.org/. In My experience it works well and would help you with this type of problem. Source: about 2 years ago
  • My website's layout is EXTREMELY weird on mobile, please help! It's like divided in half?
    Back to basics, but have you tried validating both your HTML and your CSS? Source: about 2 years ago
  • WELP
    The first thing to do when your HTML isn't working as you're expecting it to is to validate it. The tool will catch stray tags or typos and provide useful feedback. Source: about 2 years ago
  • What was going on in the web development world that XHTML was designed to address? Was it successful?
    In this context, "must have" means "to pass the W3C validator," because in the long run, XHTML 2.0 was meant to be read only by browsers that could parse XML (not HTML). No XML, no content shows up (either XML on the browser end, or proper XHTML on the author end). Source: about 2 years ago
  • Learning to make websites and need practice, does anyone want a website for free?
    When you do a few different sample sites it will give your future clients something to be sold on. Make each site different - do at least one without bells and whistles (i.e. No Javascript, etc), one using something like PHP, etc. Helps to show clients your range. And validate every site using something like validator.w3.org and fix any issues reported. Source: about 2 years ago
  • I just took an HTML5 assessment and I was surprised how bad I did.
    HTML validation is kinda irrelevant since it's up to browsers to interpret your HTML and they don't follow the standards perfectly. Errors that the validator finds may not have any impact on real-world use, and problems that show up in browsers may not be found by the validator. For instance, I just tried running a site through validator.w3.org and it gave an error because it thinks the pipe symbol (|) is not... Source: about 2 years ago
  • Noob making an attempt at text replacement?
    Are you writing this HTML yourself? It's malformed (throw it into the official W3 validator to check). Source: about 2 years ago
  • What is the W3C VALIDATOR?
    The w3c validator is one of the many HTML validators that checks your HTML markup to see if you are following the rules for constructing proper HTML. Source: about 2 years ago
  • How To Validate Your HTML5 Code Using An Online Validation Service | W3C...
    This will be a video tutorial on how to find and fix html coding errors using an online validation service. For this tutorial I will be using the W3C validator https://validator.w3.org/. Source: about 2 years ago

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This is an informative page about W3C Markup Validation Service. You can review and discuss the product here. The primary details have not been verified within the last quarter, and they might be outdated. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.