URL Normalization Guide: Canonical Forms and Deduplication
URL normalization removes inconsistencies: trailing slashes, default ports, case variations, and redundant encoding. Essential for crawlers, caches, and deduplication.
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Tags: url, developer-tools, seo
URL Normalization Guide: Canonical Forms and Deduplication Two URLs that point to the same resource but look different cause real problems: duplicate content in search index, cache misses, broken deduplication in link crawlers, and inconsistent analytics. URL normalization is the process of reducing URLs to a canonical form so that equivalent URLs compare as equal. This guide covers each normalization technique, why it matters, and how to implement it. Normalization Techniques Lowercase the Scheme and Host The scheme and host are case-insensitive per RFC 3986. Normalize both to lowercase. The constructor already normalizes scheme and host to lowercase. The path is case-sensitive and should NOT be lowercased (unless you know your server is case-insensitive, like on Windows). Remove Default…
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