ResourceTopic: developmentUpdated Jan 1, 2026

Markup Validation

W3C HTML Validator checks HTML markup for web standards compliance.

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Source: validator.w3.org

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W3C HTML Validator checks HTML markup for web standards compliance
The W3C HTML Validator checks HTML code for syntax errors and compliance with web standards to ensure proper structure and compatibility
Clarify success metrics and constraints for markup validation.

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Markup Validation

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