Email Extractor

It is: [a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+.[a-zA-Z]{2,24}. Translation: a local part of common ASCII characters, an @ sign, an ASCII domain with letters/digits/dots/hyphens, then a final TLD of 2-24 ASCII letters. The TLD length cap rejects pathological trailing matches like [email protected] where the regex would otherwise gobble too much.

No. The regex is ASCII-only. Internationalised domains like foo@münchen.de or foo@日本.jp won’t be matched. The original FAQ claimed support for “international domains” – that wasn’t accurate. If you need IDN, run the input through Punycode normalisation first (so münchen.de becomes xn--mnchen-3ya.de) and then re-extract.

The first occurrence of each email is kept; subsequent occurrences are skipped. Comparison is case-insensitive by default (email local-parts are case-insensitive in practice, even though the RFC permits case-sensitive local parts). Toggle “case sensitive” if you really want to keep [email protected] and [email protected] as separate entries.

The 3 most frequent domains in the deduped output, with their counts. Useful for sniffing list quality – if you see gmail.com (847) dominating your “customer leads” list, that’s a signal you’ve scraped a lot of personal-mail addresses.

Sometimes. The regex is content-agnostic – if your input contains href="mailto:[email protected]", the email portion will match. If a URL has [email protected] in its query string, that match too. The tool deliberately does NOT try to strip surrounding markup; that lets it work on any text source. If you need only “real” emails, filter the output by domain or hand-review.

Linear in input length. 100 kB of text runs in well under 50 ms on a modern machine. The 100 ms input debounce keeps typing smooth even on very large pastes. For multi-megabyte inputs, the regex.match still finishes in well under a second.

No. The page loads three static files (HTML, CSS, JS) and then runs entirely in your browser. You can disconnect from the internet after the page loads. No analytics, no tracking, no cookies.

Yes – free, unlimited, no signup, no watermark. Use the output in any context. Attribution to is appreciated but not required.