URL Canonicalization by SEO Rules

The tool brings links to a single canonical form using a set of SEO rules: it switches the address to HTTPS, removes or adds www, lowercases the URL, normalizes the trailing slash, and strips UTM tags, query parameters and ports. Paste a single link or a list — one per line — and enable the rules you need: the result is recalculated instantly and can be copied with one button or downloaded as CSV.

A canonical URL is the single preferred address of a page among all of its variants. The same page is often reachable at several addresses at once: with and without www, over HTTP and HTTPS, with and without a trailing slash, with and without campaign tags. Search engines treat those as different URLs, so the page's authority gets split and duplicates end up in the index. A single canonical form solves that.

10 rules: use HTTPS, remove www, add www, lowercase the URL, add a trailing slash, remove the trailing slash, remove UTM tags, remove all query parameters, remove ports and remove the fragment (#). All of them are enabled by default except "Add WWW" and "Remove trailing slash". The "Remove WWW" and "Add WWW" rules are mutually exclusive, and so are the two trailing-slash rules: turning one on automatically turns the other off.

There is no single correct answer — consistency is what matters. For search engines /blog/post and /blog/post/ are different addresses, so a site should stick to one format and redirect the other one to it. The tool brings a whole list to the format you choose.

The scheme and the host are case-insensitive by specification, so HTTPS://Example.COM and https://example.com are literally the same address, and the tool always lowercases them. The path is case-sensitive, which is why lowercasing it is a separate rule. Query parameter values and the fragment are never touched: they often carry identifiers, tokens and base64 data where case is critical.

From a search perspective both variants are equal — pick one and redirect to it. Usually the one that is already indexed and used in existing links wins. The "Add WWW" rule only applies to second-level domains: addresses with their own subdomain, such as blog.example.com, and IP addresses do not get www, because that would point at a different site.

Yes. Paste a list with one link per line and the tool processes every line at once. Empty lines are skipped, surrounding whitespace is trimmed, and the order is preserved, so the result can be matched line by line against the original list. Lines that are not http or https links stay unchanged in the result and are counted in the hint below the field.

No. The tool prepares the correct address, while the rel="canonical" tag reports that address to search engines. They are normally used together: the canonical URL from the tool goes into the tag on the page, into the sitemap, into internal links and into redirect rules. A tag alone is not enough without consistent addresses, and consistent addresses are not enough without the tag.