# HTML conformance checker

A tool that reports whether markup follows the requirements placed on HTML authors.

## What is **HTML conformance checker**?

**HTML conformance checker** — A tool that reports whether markup follows the requirements placed on HTML authors.

Level: Master · [More HTML terms at this level](https://www.ask-codey.com/glossary/subjects/html/master)

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/html-conformance-checker