Most strength meters give you a vague colour. The new Password Strength Meter gives you the actual numbers — entropy in bits, the keyspace, and crack time under five different attackers.
What it does
- 0–100 score on a live gauge, derived directly from entropy.
- Entropy in bits and the keyspace size as a power of ten.
- Five attacker scenarios, from a throttled online login to a trillion-guess offline array.
- Improvement tips for the character classes you’re missing.
Why it matters
The same password can be safe online yet weak against an offline breach — and the meter shows exactly that spread. To understand entropy, keyspace, and crack time in depth, read our password entropy guide. For a quick rule-based verdict instead, the Password Strength Checker is its companion.
Free, and private
The Password Strength Meter is free and runs entirely in your browser — nothing you type is uploaded or stored.
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Frequently Asked Questions
How is this different from the strength checker?
The checker is a rule-based checklist; this meter is entropy-first — it shows bits, keyspace size, and crack time across five attacker models. Use the checker for quick guidance, the meter to understand the math.
Is my password sent anywhere?
No. Everything is computed in your browser. Your password is never uploaded, logged, or stored.
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