Extract domains from URLs

When you export links from a backlink checker, an SEO tool, or a spreadsheet, they are rarely clean. You often get a mix of full URLs, trailing slashes, and `www` prefixes.

This tool runs entirely in your local browser. It uses standard URL parsing to safely strip all the noise. It also removes duplicate domains automatically, leaving you with a clean, lowercase list that you can safely paste into a bulk availability checker.

Checking domain availability requires precision. Most bulk WHOIS or DNS tools will fail or throw errors if you feed them raw URLs like `https://example.com/about-us`.

By stripping down to the root domain (`example.com`), you ensure that your availability scans are accurate. This is especially helpful for domain investors parsing expired domain lists or SEO professionals auditing a large batch of outbound links.