They also provide suggestions for how to resolve the issue:

However, it is good practice to publish error-free content.īoth errors and warnings show you the line number with your problem. You can often ignore warnings as they do not highlight any severe issues. How to Interpret the Validator ResultsĪs we have seen, the validators generate two different outputs: errors and warnings. Once you submit your URI, document, or markup for validation, you’ll get a page with errors and warnings:Īs you can see, the results for both CSS and HTML are pretty detailed. For this, you would need to use the W3C Jigsaw tool for CSS (which we’ll be covering in a moment) or JSHINT for Javascript. Note that if your page contains any JavaScript or CSS, the HTML validator will not check it. However, you can clearly distinguish it with a human check. However, this is not always possible since the validator doesn’t consider everything the user can see.įor instance, if you have an image with a gradient, the validation tool will raise an error stating that the contrast between picture and background is unclear. Ideally, you’ll want to have zero errors and warnings. Once you submit your page or document for checking, the validator will generate a list of all errors and warnings connected to the HTML code: You can enter the URI of the document you want to check, upload the file containing your code, or enter the markup you want to validate into the provided field:

This tutorial will show you how to use these tools to check your work. How to Validate Code Using W3CĪs mentioned earlier, the W3C validators scan your HTML and CSS code to ensure that they meet the web standards set by the organization. This may, in turn, improve your Core Web Vitals scores and boost your SEO. These tools will also help you verify the cross-platform compatibility of your work, creating a better User Experience (UX). It verifies the markup validity of web documents in HTML, XHTML, SMIL, MathML, etc.īy adhering to these web standards, you can ensure that your content is user-friendly and accessible. The HTML validator works in a very similar way. The CSS validator is called Jigsaw, and it checks your content against the W3C web standards. It offers validator services to help you verify that your HTML and CSS code is valid and error-free.

W3C stands for World Wide Web Consortium, and it’s an international organization that oversees coding standards across the web. 3 How to Interpret the Validator Results.

Css html validator