html validator
# W3C - Check the markup (HTML, XHTML, …) of Web documents:
https://validator.w3.org/
# CSS:
https://jigsaw.w3.org/css-validator/
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New code examples in category Shell/Bash
# W3C - Check the markup (HTML, XHTML, …) of Web documents:
https://validator.w3.org/
# CSS:
https://jigsaw.w3.org/css-validator/