Bulk Root Domain Converter

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Guests and non-premium users are limited to 500 lines per run.

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Max Lines

Limit for your plan: 500 lines.

Remove leading "www." Lowercase output Remove duplicate domains Sort output alphabetically Ignore empty lines

About the Root Domain Converter

Converts URLs or hosts to their registrable root domain (e.g., sub.a.example.co.uk → example.co.uk). For best accuracy, it uses the Public Suffix List parser when installed via Composer; otherwise, a smart fallback for common multi-part TLDs is used.