Password Strength Calculator

Check how long it would take to crack your password. Everything runs in your browser — nothing is sent to any server.

Enter a password

Character Sets Used

Lowercase (a-z)

Uppercase (A-Z)

Digits (0-9)

Symbols (!@#...)

Length: 0 characters

Pool size: 0 characters

Possible combinations: 0

Time to Crack

Instantly

At 10 billion guesses/second

Strength Rating

No password

0 bits of entropy

Entropy0 bits

Assumptions

Attacker has 10 billion guesses per second (modern GPU cluster)
Brute force attack — no dictionary or pattern shortcuts
On average, attacker finds the password at 50% of combinations
Your password is not in any known breach database

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Frequently asked questions

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Frequently asked questions

How is password crack time calculated?

Is my password sent to your server?

Why does length matter more than complexity?

What is a good number of entropy bits?

Related calculators

Subscription Cost

Net Worth

50/30/20 Budget

Protect your financial accounts

Frequently asked questions

How is password crack time calculated?

Is my password sent to your server?

Why does length matter more than complexity?

What is a good number of entropy bits?

Related calculators

Subscription Cost

Net Worth

50/30/20 Budget