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Deprecated Tags Checker

Scan any webpage for outdated or deprecated HTML5 tags that should be replaced.

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About Deprecated HTML Tags

HTML is constantly evolving. As new specifications like HTML5 are released, older tags are "deprecated"—meaning they are no longer recommended and may eventually lose browser support.

Why you should avoid them

  • Browser Compatibility: Browsers are not required to support deprecated tags.
  • SEO Impact: Using modern, semantic HTML helps search engines understand your content better.
  • Accessibility: Modern tags often have built-in accessibility features that older tags lack.
  • Maintenance: Mixing presentation with content (like using `<font>` or `<center>`) makes code harder to maintain. CSS should be used instead.

Frequently Asked Questions

A deprecated HTML tag is one that has been outdated by newer HTML specifications (like HTML5). While browsers may still support them temporarily, they are no longer recommended and may eventually be removed completely.
Removing deprecated tags ensures your website is compliant with modern web standards, improves cross-browser compatibility, enhances accessibility for screen readers, and often provides a slight SEO boost by using semantic HTML.
The <center> tag mixes content with presentation. You should instead use CSS properties like text-align: center; for text or margin: auto; for block elements.
Yes. Search engines like Google prefer modern, semantic HTML5 because it helps them understand your page structure better. Outdated code can signal that a website is unmaintained.
The <font> tag should be completely replaced by CSS styling. Use properties like font-family, font-size, and color applied to classes or IDs.
Eventually, yes. While browsers maintain legacy support for a long time, there is no guarantee that a deprecated tag will render correctly (or at all) in future browser updates.
Our scanner checks for over 20 commonly deprecated HTML tags including acronym, applet, basefont, big, blink, center, dir, font, frame, frameset, marquee, strike, and more.

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