Kingsquare HTML Validator

How to install an extension Open in Chrome Web Store

CRX ID

anjdemaoejlpgmnmkijdemoiebcddhkc

Description from extension meta

A HTML5 validation library, using a JavaScript port of the excellent TIDY library

Image from store

Description from store

This extension brings the the TIDY HTML Validation library to your browser. You will no longer need remote services to validate your HTML(5). This is the first offline HTML validator for Chrome.

For more information on the project, see http://www.kingsquare.nl/html-validator

** PLEASE NOTE **

Please restart your browser after installing the extension.

Open the development tools panel to activate the validator. Every page will get validated automatically, check the flag at the end of your address bar to see the current status. See the last tab of the development tools to get a full report.

Latest reviews

Patrick Gallagher 2019-02-28: Might like it if I could get it to do something. Does not seem to check anything.
Patrick Gallagher 2019-02-28: Might like it if I could get it to do something. Does not seem to check anything.
Lodewijk Abrahams 2017-11-27: Why does this module not qualified the display video's at the nu.nl?
Lodewijk Abrahams 2017-11-27: Why does this module not qualified the display video's at the nu.nl?
Paul Brown 2016-06-23: too finicky Should just show errors
Paul The Dart 2016-06-23: too finicky Should just show errors
maksim 2015-10-29: Good plugin, but the output format is **horrible**...
maksim 2015-10-29: Good plugin, but the output format is **horrible**...
Raymond DeCampo 2015-10-15: Tried this on a site that passed the W3C validator and got spurious warnings (e.g. no DOCTYPE even though DOCTYPE existed, warnings about leftmargin on <body> when there was no such atribute). Also does not work on AJAX sites as far as I could see. Final nail is that if developer tools were not already open, requires a reload to validate.
Raymond DeCampo 2015-10-15: Tried this on a site that passed the W3C validator and got spurious warnings (e.g. no DOCTYPE even though DOCTYPE existed, warnings about leftmargin on <body> when there was no such atribute). Also does not work on AJAX sites as far as I could see. Final nail is that if developer tools were not already open, requires a reload to validate.
Daniel 2015-09-09: Opening a local file does not update the validation until you reload an unrelated non local page. Reloading the local file itself does nothing.
Daniel 2015-09-09: Opening a local file does not update the validation until you reload an unrelated non local page. Reloading the local file itself does nothing.
Ulaş ÖNCÜL 2015-08-16: The information produced is not useful...
Ulaş ÖNCÜL 2015-08-16: The information produced is not useful...
Dennis Eichhorn 2014-08-15: Horrible errors/warning.
Dennis Eichhorn 2014-08-15: Horrible errors/warning.
Gerben Tiele 2014-05-13: Works okay but false UTF8 errors are flooding the results.
Gerben Tiele 2014-05-13: Works okay but false UTF8 errors are flooding the results.
Robb Charnock 2014-04-10: pro: incorporated into dev tools, thats great! con: just outputs text, it would be really nice if it linked back to the elements tab or something.
Robb Charnock 2014-04-10: pro: incorporated into dev tools, thats great! con: just outputs text, it would be really nice if it linked back to the elements tab or something.
mmm oude gdrive 2013-10-24: Great plugin! a bit more info around warnings and errors (some context maybe..) would be nice though..
mmm oude gdrive 2013-10-24: Great plugin! a bit more info around warnings and errors (some context maybe..) would be nice though..
CHATGPT 2013-10-18: I love this one so much, error message are important especially if you're want to know the error. Agree with some commentators, that it would be nice if the next version use highlighting in error message :D
CHATGPT 2013-10-18: I love this one so much, error message are important especially if you're want to know the error. Agree with some commentators, that it would be nice if the next version use highlighting in error message :D
Aaron Adams 2013-09-03: Not a terrible plugin, but it can't handle UTF-8 encoded characters on UTF-8 encoded pages. It spits out warnings for each and every character, which rapidly gets tiresome.
Aaron Adams 2013-09-03: Not a terrible plugin, but it can't handle UTF-8 encoded characters on UTF-8 encoded pages. It spits out warnings for each and every character, which rapidly gets tiresome.
Abe Petrillo 2013-06-28: I gave it 4 as it works offline which I've been looking for for a while. Gives the validation by line number, would be more helpful if you could highlight the element. If the code is on github I don't mind having a look at implementing this?
Abe Petrillo 2013-06-28: I gave it 4 as it works offline which I've been looking for for a while. Gives the validation by line number, would be more helpful if you could highlight the element. If the code is on github I don't mind having a look at implementing this?
Mathias Schreiber 2013-02-12: Coming from Firefoxes validator I miss some small things. First off, I dislike having to enable it everytime I re-open a page. Second the error messages could use some love, though for a techy they are good enough. all in all: ok.
Mathias Schreiber 2013-02-12: Coming from Firefoxes validator I miss some small things. First off, I dislike having to enable it everytime I re-open a page. Second the error messages could use some love, though for a techy they are good enough. all in all: ok.
Ionel Cristian Mărieș 2012-11-18: Error messages are useless
Ionel Cristian Mărieș 2012-11-18: Error messages are useless
Sergio Vera 2012-10-10: At least a validator that doesn't depend on external services! The integration with Chrome is great, but for a next version I would like to see the warnings list with some formatting applied... right now, it looks a little messy. Anyway, nice work!
Sergio Vera 2012-10-10: At least a validator that doesn't depend on external services! The integration with Chrome is great, but for a next version I would like to see the warnings list with some formatting applied... right now, it looks a little messy. Anyway, nice work!
Hilde Skjølberg 2012-09-13: Would probably love it if I could get it to work...
Hilde Skjølberg 2012-09-13: Would probably love it if I could get it to work...
Robin Speekenbrink 2012-08-27: Have long awaited this since moving from firefox to chrome for development... Nice to see this implemented in such a 'clean' and non obtrusive way!
Robin Speekenbrink 2012-08-27: Have long awaited this since moving from firefox to chrome for development... Nice to see this implemented in such a 'clean' and non obtrusive way!

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