Regex for combination of letters and number that is 5-30 letters long, has at least 4 capital letters, 2 lowercase and at least 1 number

Question

Hey guys I'm new to regex and I want to create 1 single regex that matches with texts that are

• 5-30 letters long,
• have no special characters,
• have at least 4 capital letters,
• have at least 2 lowercase letters and
• at least 1 number.

Examples: should match

1. https://stackoverflow.com/Abcde3FGhiDE/Zyx23 should match: Abcde3FGhiDE
2. |a|b|c|AbcdEFGH123|456Ac should match: AbcdEFG123
3. P A Abcde3FGhiDE Z H should match: Abcde3FGhiDE
4. ZZ123!Abcde3FGhiDE!123 should match: Abcde3FGhiDE

Examples: no match

5. <HeLLoWoRlD"123
6. |A|b|c|D|E|F|1|
7. NULLLLLLLLLLLLLLLLLLLLLLllll 1
8. IAMoverTHELIMITTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT3

Please make it as concise as you can. My attempt (demo):

(?=(?:\d*[A-Za-z]))(?=(?:\S*?[A-Z]){4,}\S*?$)(?=(?:[a-zA-Z]*\d))[A-Za-z0-9]{5,30}

Answer 1

You might use

\b(?=(?:[a-z0-9]*[A-Z]){4})(?=(?:[A-Z0-9]*[a-z]){2})(?=[a-zA-Z]*[0-9])[A-Za-z0-9]{5,30}\b

Explanation

• \b Word boundary
• (?=(?:[a-z0-9]*[A-Z]){4}) Assert 4 uppercase chars A-Z
• (?=(?:[A-Z0-9]*[a-z]){2}) Assert 2 lowercase chars a-z
• (?=[a-zA-Z]*[0-9]) Assert a digits
• [A-Za-z0-9]{5,30} Match any of the listed 5 - 30 times
• \b Word boundary

Regex demo

Answer 2

5-30 letters long, has at least 4 capital letters, 2 lowercase and at least 1 number

This mignt not be the cleanest but:

/^(?=[a-ZA-Z\d]{5,30}$)(?=(.*[A-Z]){4})(?=(.*[a-z]){2}).*\d/