Extract Email Domains
Paste text to collect domains from explicit simple email patterns. The tool uses no network checks, ownership checks, or mailbox verification.
A QUICK WALKTHROUGH
How to use this tool
- Paste up to 100,000 characters.
- Extract domains from simple unquoted email patterns.
- Review the unique domains in first-seen order, then copy or download them.
Explicit simple pattern only
Matches use an unquoted ASCII local part followed by @ and a domain with DNS-style labels. Standalone domains, URLs, quoted addresses, domain literals, and Unicode local parts are ignored. This extracts text syntax only; it does not verify reachability or ownership.
Stable deduplication
Domains are compared case-insensitively, emitted lowercase, deduplicated, and kept in first-seen order. Input is limited to 100,000 characters and results to 10,000 domains.
GOOD TO KNOW
Common questions
Does this check whether a domain exists?
No. It never performs DNS, network, mailbox, or ownership checks.
Are URLs or standalone domains included?
No. A domain is emitted only when it is part of an explicit simple email-shaped match.
How are duplicates handled?
Comparison ignores case; each domain is emitted once in the order its first matching email appears.