HTML Validator

Add HTML Validator in Developer Tools

What is HTML Validator?

'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.

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Extension stats

By: https://gueury.com

View on Chrome Web Store

Users: 40,000+

Rating: 3.35 (37)

Version: 0.9.9.8 (Last updated: 2022-12-28)

Creation date: 2018-05-28

Risk impact: High risk impact

Risk likelihood: Very low risk likelihood

Manifest version: 3

Permissions:

storage
activeTab
clipboardWrite
webNavigation
scripting

Host permissions:

<all_urls>

Size: 2.62M

Email: mg*****@skynet.be

URLs: Website

Ranking

# 4639 ▼ 31

Other rankings

#639 in Developer Tools ▲ 1

#1 in html keyword 28

#32 in error keyword 16

#72 in algorithm keyword 2 ▼ 8

#81 in developer tools keyword 59 ▲ 15

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Other platforms

Not available on Firefox

Not available on Edge

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Extension summary

Analyze keywords

This is the of HTML Validator extension for Chrome Manifest V3. It checks the code, syntax, of your HTML 5 pages.

HTML Validator for Chrome is a browser extension that adds HTML validation inside Developer Tools of Chrome. The number of errors of a HTML page is seen with an icon in the browser status bar. The details is seen in the developer tools.

The extension is based on HTML Tidy. The algorithm was originally developed by the Web Consortium W3C. The algorithm is embedded inside your browser and makes the validation locally on your machine, without sending HTML to a third party server.

HTML Tidy is a helpful program that tries to help people to correct their HTML errors. It finds HTML errors and classifies them in 3 categories:

errors: HTML errors that Tidy cannot fix or understand.
warnings: HTML errors that Tidy can fix automatically
(optional) accessibility warnings: HTML warnings for the 3 priority levels defined in W3c WAI

There is also an automatic "Clean up" button that will do his best to propose you a cleaned version of your page, without errors.

For any question, mail me at [email protected] or log a bug in:

https://gitlab.com/mgueury/html_validator/issues

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

Good integration into the developer tools for inspecting errors.
It helps identify inaccuracies and mistakes in HTML code.
Works well for basic validation tasks.
Can display the source directly from the HTML validator tab.

Cons

Does not refresh or update validation after page reloads.
Sometimes provides false errors or warnings.
Crashes frequently and can be unresponsive.
Not fully compliant with HTML5 standards.

Most mentioned

Does not refresh after page reload.
Provides false errors/warnings.
Crashes or is unusable for many users.

Recent 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)

Reda Benh, 2024-10-04

It does not refresh itself after a page reload :(

Attila Skyler Magyari, 2024-06-29

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.