Apps similar to HTML Validator include Scrutiny. It's paid, but W3C Markup Validation Service and mailmouse are free. Other options are Screpy, Total Validator and Rocket Validator. In total there are six Code Editors like HTML Validator for the web, Mac, Windows, Linux and Android.
If you need more features than only a website link checker - such as XML sitemap (conforming to the standard protocol), html validity, essential SEO checks such as page title, headings, meta description and keywords - then try Scrutiny.
Screpy is an AI-based web analysis tool that can analyze all pages of your websites in one dashboard and monitor them with your team. It's powered by Lighthouse and it also includes some different analysis tools (SEO, SERP, W3C, Uptime, etc).
Total Validator is an HTML validator, an accessibility validator, a spell checker, and a broken links checker all rolled into one tool, allowing one-click validation of your website.
The validation process used, is based on email development experience and good practices developed by leading email marketing agencies and email services in this field.
HTML markup validation is a key factor in web development - it ensures your sites conform to the latest W3C standards and that it's free from errors like unclosed tags or invalid attributes.
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