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See how strong a password is: rating, entropy and estimated brute-force time. Everything is calculated in your browser.
What this tool does
Shows a password strength level, its approximate entropy in bits, an estimated brute-force time and a list of the requirements the password meets or misses.
How to use it
Type a password into the field — the rating updates as you type. Use “Show password” to make sure you typed it correctly. If the result is weak, create a new one with the password generator.
How the rating works
It considers length, character variety (lower- and uppercase letters, digits, symbols, Cyrillic), repeats, sequences such as 1234 or qwer, and matches with well-known passwords. Brute-force time assumes fast offline guessing of about 10 billion attempts per second.
Tip
A long, unique password from a password manager beats a “complex” password that is easy to guess. Never reuse a password across services and turn on two-factor authentication.
Frequently asked questions
Is my password sent to a server?
No. The check runs only in your browser: the password is never sent or stored.
How accurate is the rating?
It is an estimate based on length, character variety and common weak patterns. It does not guarantee the security of any account.