HTML Validator

Add HTML Validator in Developer Tools

HTML Validator Extension for Chrome

'HTML Validator' is a Chrome extension based on HTML Tidy algorithm originally developed by W3C. It enables validation of your HTML codes right inside the developer tools of your Chrome browser. It identifies HTML errors and categorizes them for easy resolution. With the 'Clean up' feature, it can even offer a version of your HTML page free from errors. All these tasks are performed locally, ensuring your HTML codes are not sent to any third-party server.
Install from Chrome Web Store

Extension stats

Manifest V3
Users: 40,000+
Rating: 3.35
(37)
Version: 0.9.9.8 (Last updated: 2022-12-28)
Creation date: 2018-05-28
Permissions:
  • storage
  • activeTab
  • clipboardWrite
  • webNavigation
  • scripting
Host permissions:
  • <all_urls>
Size: 2.62M
URLs: Website
Full description: See detailed description

Other platforms

Not available on Android
Not available on Firefox
Not available on Edge

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Integrates well into the developer window
  • Can see the source directly from the HTML validator tab in dev tools
  • Helps identify errors and inaccuracies in HTML
Cons
  • Does not refresh itself after a page reload
  • Plugin crashes frequently and is barely usable
  • Provides false errors or warnings
  • Requires access through Developer Tools instead of displaying validation automatically
Most mentioned
  • Issues with refreshing and updating
  • Plugin instability and crashing
  • False positives in error reporting
User reviews
Extension not maintained ! Unable to refresh the analysis . the "HTML Validator" tabs keeps always the old release , even when i refresh the page CTLR+R. This important issue was logged 3 years ago ! (see #61 in gitlab issues)
by Reda Benh, 2024-10-04

It does not refresh itself after a page reload :(

Pretty decent, but it doesn't seem to be fully HTML5 compliant. It didn't like me using "checked" instead of checked="checked", both of which are valid for HTML5.
by Carmody Staff, 2022-12-22
View all user reviews

Extension safety

Risk impact

HTML Validator requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood

We don't have sufficient data to confidently determine the risk likelihood of HTML Validator. Use it at your own risk.

Risk likelihood analysis details
  • High This extension publisher URL may be invalid
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Promo images

HTML Validator marquee promo image
Marquee promo image
HTML Validator small promo image
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