Password Strength Checker
Analyze your password strength with detailed feedback based on NIST SP 800-63B and OWASP guidelines. Client-side only — your password never leaves your browser.
Ready to hash your password? Use our Bcrypt Generator →
What makes a strong password?
NIST SP 800-63B (2026) recommends prioritizing password length over complexity rules. A 16-character passphrase is stronger than an 8-character password with symbols.
NIST 2026 key recommendations
- Minimum 8 characters — 12+ strongly recommended
- Allow all printable ASCII and Unicode characters
- Check against lists of known compromised passwords
- Do not require mandatory complexity rules or periodic resets
- Support paste functionality in password fields
Once you have a strong password, protect it by storing it as a bcrypt hash. Try the Bcrypt Generator →
Learn which hashing algorithm to choose: Bcrypt vs Argon2 and how many rounds to use in 2026.