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Validators
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This article lists different resources for developers to check web documents.


- `W3C HTML Validator <https://validator.w3.org/>`_ validates HTML documents.
- `W3C CSS Validator <https://jigsaw.w3.org/css-validator/>`_ validates CSS stylesheets.
- `W3C Link Checker <https://validator.w3.org/checklink>`_ checks for broken links in HTML documents.
- `HTML Tidy <https://www.html-tidy.org/>`_ tool finds errors in HTML documents, and can automatically fix some errors.