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Links

Web Resources

World Wide Web Consortium Markup Validation Service
Validates (X)HTML files and lists errors and warnings to help correct files. Pages can be validated by website address, file upload, or by copying and pasting the code directly into the validator.

World Wide Web Consortium CSS Validation Service
Validates CSS files and lists errors and warnings to help correct CSS files. Files can be validated by website address, file upload, or by copying and pasting the code directly into the validator.