Total Validator - Total Validator can check your website to help ensure that it is accessible, uses valid HTML and CSS, has no broken links, and is free from spelling mistakes.
Havoc Shield - Cybersecurity built for startups and small business in an affordable, all-in-one suite of tools. Put a cybersecurity program in place in under a week to protect your business from ransomware and cybersecurity attacks.
W3C Markup Validation Service - Validates HTML markup of web pages, one at a time.
Vanta - Automate compliance, simplify security.
Rocket Validator - Site-wide Accessibility and HTML validation made easy. With a single click, Rocket Validator will check thousands of web pages on your site for Accessibility and HTML conformance, producing a detailed, actionable report on seconds.
Securicy - Control Your Security. Keep Control of Your Time.