
Description: An HTML validator is a software tool that checks HTML code for errors and issues to ensure it meets web standards. It scans HTML documents to detect malformed code, invalid markup, and other problems.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Rocket Validator is an open source browser extension for validating web page HTML, links, accessibility, SEO and more. It integrates seamlessly into the browser for easy website testing and works across all major browsers.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API