Alternatives to W3C Markup Validation Service for all platforms with any license

Platforms

Desktop

Web / Online

Browsers

  • HTML Validator icon

    HTML Validator

    HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon in the status bar when browsing. The details of the errors are seen when...

    Free Mac Windows Linux Firefox

    No features added Add a feature
  • Total Validator icon

    Total Validator

    Total Validator is an HTML validator, an accessibility validator, a spell checker, and a broken links checker all rolled into one tool, allowing one-click validation of your website.

    Freemium Mac Windows Linux

    No features added Add a feature
  • Rocket Validator icon

    Rocket Validator

    HTML markup validation is a key factor in web development - it ensures your sites conform to the latest W3C standards and that it's free from errors like unclosed tags or invalid attributes. But, validating a large site, one...

    Commercial Web / Cloud

    No features added Add a feature
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