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  1. MDN Web Docs Glossary: Definitions of Web-related terms
  2. Validator
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Table of contents

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Validator

A validator is a program that checks for syntax errors in code. Validators can be created for any format or language, but in our context we speak of tools that check HTML, CSS, and XML.

Learn more

General knowledge

  • Validator on Wikipedia
  • Short list of validators

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Last modified: Dec 18, 2020, by MDN contributors

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