Check the page before scaling it.

Begin with your own evidence

Paste one absolute HTTP or HTTPS URL per line, up to 1,000 lines and 100,000 characters. Addresses containing spaces, control characters, backslashes or credentials are rejected. The tool identifies exact normalized duplicates and shows hostname counts. It runs locally and does not fetch the URLs.

Normalization removes fragments and default ports through the browser URL parser. It retains path case, query parameters and trailing slashes because those can identify different resources. The result is an inventory check, not a canonicalization verdict.

Two different URLs can contain identical content, while two similar-looking URLs can be distinct. This tool does not crawl, inspect robots directives, check status codes, or determine which URL Google selected as canonical.