Strong Password Validation Regex
Uses three lookaheads to require at least one lowercase letter, one uppercase letter, and one digit, then demands 8+ total characters. With the m flag enabled, each line below is validated independently — matching lines pass the policy.
runs 100% in your browser — nothing is uploaded
- 1Paste your textDrop your logs, code, or data into the test box on the right.
- 2Tweak the patternEdit the regex formula or toggle the g / i / m flags on the left.
- 3See matches instantlyMatching text lights up as you type, with a live counter.
//gm
Explanation — token breakdown▾
Matches: 0
Matching runs locally as you type — nothing you paste here leaves this tab.