Password Strength Checker Online (Free, Private)
Check password strength with a visual score and feedback. Runs locally — your password never leaves your browser.
Weak passwords are the top cause of account breaches. A strength checker evaluates length, character diversity, and common patterns — but only trust tools that process locally when testing real passwords.
What makes a password strong
- 16+ characters for important accounts
- Mix of upper, lower, numbers, and symbols
- Not based on dictionary words or personal info
- Unique per site — never reused