Compare password strength side by side
Put two or three candidates next to each other and see which one holds up, and by how much. Handy for "is the longer one worth it?" and "does that extra symbol help?"
What the comparison usually shows
Length beats decoration. Adding one random word or four random characters moves a password much further than swapping letters for symbols. zxcvbn-ts undoes common swaps like @ for a and 0 for o before pricing a word.
Predictable edits barely count. Turning Summer2024! into Summer2025! changes nothing an attacker cares about. Year suffixes, capital first letters and a trailing ! are the first mutations cracking rules apply.
Random is random. A password generated by a machine from a large alphabet has no patterns to exploit, so its guess count is simply alphabet size to the power of length.
Compare FAQ
Why compare passwords side by side?
Seeing two candidates next to each other makes trade-offs obvious: a longer passphrase against a shorter random string, or a password with and without a suffix. You can check whether a change you plan actually helps before you commit to it.
Are the passwords I compare sent anywhere?
No. Every column is scored by zxcvbn-ts in your browser. Nothing is transmitted, logged or saved, and the fields clear when you leave the page.
Why does a long passphrase beat a short complex password?
Each random word from a 7,776-word list adds about 12.9 bits, while each random character from the 94 printable ASCII symbols adds about 6.6. Five random words carry about 64.6 bits, roughly as much as ten fully random characters, and are far easier to type and remember.
Which password should I pick if both are "Very strong"?
Choose the one you can use reliably, ideally stored in a password manager. Past about 10^14 guesses, the stored hash and whether the site is breached matter more than extra bits.