Knowledge Base

Answers and Guides

How to Try or Download CSS HTML Validator (and What It Runs On)

You can try CSS HTML Validator before paying: the site offers a free trial download, plus a permanently free "Limited Version." T…

What Kinds of Website Problems Can CSS HTML Validator Help You Find and Fix?

CSS HTML Validator is a locally installed web development and quality tool that checks HTML/HTML5, CSS, accessibility, SEO, links…

What to Know Before Buying CSS HTML Validator: Licensing, Editions, and Guarantees

CSS HTML Validator is a one-time-purchase desktop tool for checking HTML/HTML5, CSS, accessibility, SEO, links, spelling, and mor…

CSS HTML Validator Editions and Platform Options Compared

CSS HTML Validator comes in four purchase paths: a free Limited Version, Home (listed at $60 or less), Professional (listed at $1…

What Is htmlvalidator.com? CSS HTML Validator Explained

htmlvalidator.com is the official site for CSS HTML Validator, a locally installed web development and quality-checking tool that…

What Can You Actually Do With Free SEO Tools?

Free SEO tools can handle a surprising amount of real work: checking backlinks, auditing on-page elements, tracking keyword posit…

How Search Engines Find, Crawl, and Rank Pages: A Practical SEO Workflow

Search engines work in three separate stages: discovery, crawling/indexing, and ranking. A page can fail at any one of them, and …