Free · Check a long phrase made from words
Passphrase Strength Checker
Measure a passphrase by its words, guess score, and estimated attack time.
- zxcvbn-ts local estimate
- Password never leaves this tab
- Password-free reports
Check passphrase
The checker loads on this device. Your password is never uploaded or put in a report.
1
Enter a test choiceThe field stays in this tab
Private by designRuns with zxcvbn-ts in this browser
2
Read the safe resultReady when you are
Your score will appear here
The result shows strength and patterns, never the password itself.
Three simple steps
How to use it
- Enter the full passphrase.
- Check its word count and score.
- Replace common phrases with unusual words.
Your password stays on this device
zxcvbn-ts checks the password inside this browser tab. Bookify does not upload, save, or log it. Results and downloads leave the password out. Crack times are estimates, not guarantees.