Pattern
/\b(?:\d[ -]*?){13,19}\b/Sample text
4111 1111 1111 1111 5500-0000-0000-0004 1234Test this pattern in the editor
Credit card numbers
13–19 digit groups (Luhn not validated).
Related patterns
Strong-ish password
Require length and mixed character classes (demo only).
USD amounts
Dollar amounts with optional thousands and cents.
JWT tokens
Three base64url segments separated by dots.
Base64 blobs
Longish base64 strings with optional padding.
IBAN
International bank account numbers (structure only).
SWIFT / BIC
8 or 11 character bank identifier codes.