OpenSP . Both algorithms were originally developed by the Web Consortium W3C . And now extended and improved by a lot of persons. Both algorithms are embedded inside Mozilla/Firefox and makes the validation locally on your machine, without sending HTML to a third party server.
There is also an automatic "Clean up" button that will do his best to propose you a cleaned version of your page, without errors.
Download : version 0.9.5.2 - FOR FIREFOX 4.0 to 11.0 - Windows, Linux 32 bits, 64 bits and Mac OS X
New in Version 0.952, you can move the HTML Validator icon in any toolbar : see User Guide .
Since version 0.951, the binary part of the extension has got a major changes. All Firefox related code has been removed to avoid the endless incompatilibity issue between version. This extension works with all version of Firefox since Firefox 4.0 and the introduction of js_ctypes.
Recompilation on other platform should follow. Feedback is welcome.
Download : version 0.9.1.2 - FOR FIREFOX 8.0 ONLY - Windows only (for now)
Since Firefox 4+ and rapid releases, XPCOM has been unfrozen. (see here )
This means practically that every extension by binary, like this one, needs to be recompiled for each Firefox version.
Due that Firefox version will follow one after the other, the current model of the extension is not viable anymore at long term.
I will need to change the structure deeply in a next version. Help is welcome.
Download : version 0.9.1.1 - FOR FIREFOX 7.0 ONLY - Windows only (for now) FIREFOX 6.0
Download : version 0.9.1.0 - FOR FIREFOX 6.0 ONLY - Windows only (for now) FIREFOX 5.0
Download : version 0.9.0.6 - FOR FIREFOX 5.0 ONLY - Windows only (for now)
Download : version 0.9.0.4 - Most platforms available
New features:
- Due to Numerous changes due to Firefox 4.0, the extension 0.9 is compatible only with Firefox 4.0
- The browser icon is in the add-on bar. The status bar does not exist in FF 4.0 anymore.
- This means too that all platforms binaries will need to be recompiled. Look the source and the forum if you want to help on the migration.
- To enable HTML 5 validation, it is possible to validate page with W3c Online too.
FIREFOX 3.6 and below Download : version 0.8.6.1 - Release notes . ( roadmap , user guide , translation , forums )
New features:
- Fix of warning in sp_start.html for some translations
- more...
If you want to see some images, click on one of the both images below.
FEATURES The extension has 3 main features:
1. Browser:
2. View Source:
Source: