html markup validation bookmarklet using the w3c api.
Acid.js validator is a free bookmarklet that uses the w3c sgml parsers API to validate the markup of the page on which it is called.
The plugin for live HTML validation of a browser page during web development.
A HTML5 validation library, using a JavaScript port of the excellent TIDY library
Hint execution of your bookmarklets
HTML Visual Validation gives you information about the html elements, live, on page.
An IDE used for creating / managing bookmarklets
Add HTML Validator in Developer Tools
Simple button to press when you want HTML5 Form validation to be removed from all the forms.
FraudGrade provides IP Validation, Email Validation, Phone Validation and Domain Validation to 1000's of businesses daily!
Shows SEO issues as you navigate pages. Displays performance data and full AMP status and errors for HTML pages.
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