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?
Is my password sent anywhere?
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