FREE SECURITY TOOLS
Enter two passwords and compare their strength, entropy, and estimated crack time side by side.
Most people know that some passwords are stronger than others — but without hard numbers, it's easy to underestimate the gap. A password like Summer2024! looks reasonable at first glance: it has uppercase, lowercase, a digit, and a symbol. But it's only 11 characters drawn from a restricted pattern, giving it roughly 52 bits of entropy — enough to survive a casual online attack, but crackable in seconds by a GPU-based offline attacker using dictionary rules.
Compare it side by side with a randomly generated 16-character password like kR9#mTpQ@vLx2Zn! — 104 bits of entropy, billions of years to crack at any realistic speed — and the difference becomes impossible to ignore.
Use this tool to evaluate passwords you're considering, test old passwords before reusing them, or help someone in your family or team understand why "their current password" isn't safe enough.
Password A
Password B
Understanding the metrics
All analysis is done locally in your browser — passwords are never sent anywhere.
sunshinevsrX9#mKpQThe random 8-char mix is ~8× more unpredictable — even though both are short.
Password1!vscorrect-horse-battery-stapleA classic dictionary word + number + symbol vs a 4-word passphrase. The passphrase wins easily on length.
qwerty123456vsT7@vLqN2#dPxBr8!Keyboard walk + numbers vs a 16-char random password. The random password has ~50 more bits of entropy.