Pattern
/\b0x[a-fA-F0-9]{40}\b/Sample text
0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0 0xshortTest this pattern in the editor
Ethereum addresses
0x-prefixed 40-hex wallet addresses.
Related patterns
UUID
Standard 8-4-4-4-12 hex UUID layout.
UUID v4
Stricter UUID version 4 with variant bits.
Credit card numbers
13–19 digit groups (Luhn not validated).
USD amounts
Dollar amounts with optional thousands and cents.
Semantic versions
MAJOR.MINOR.PATCH with optional pre-release.
Git short SHA
7–40 hex characters typical of git commits.