Paste a block of text and get a clean list of what you are looking for.
Pick what to extract and the tool finds every match using patterns tuned to avoid trailing punctuation, so a link at the end of a sentence does not carry the full stop with it. Results can be de-duplicated and sorted, and the status line shows how many were found.
The patterns cover common formats rather than every legal edge case, so unusual addresses may be missed. For custom patterns, use the Regex Tester.
It finds standard addresses. Obfuscated ones such as name at example dot com are not detected.
Laws about using addresses vary. Collecting is one thing, but sending unsolicited marketing to them may breach privacy and anti-spam rules.
Yes, with the Regex Tester you can write your own pattern and see its matches.