Analyse password strength in real time. Shows entropy in bits, estimated crack time, character type breakdown, and a strength meter as you type.
Open Password Strength Analyser → free, no sign-inNot all passwords that feel strong are. '123456' is obviously weak; 'Summer2024!' is weaker than it looks. The Password Strength Analyser gives you a real assessment: entropy in bits, estimated crack time, character type breakdown, and a strength meter — all updating as you type. It tells you why a password is weak, not just that it is.
Anyone evaluating the strength of a password they've chosen, developers educating users about password quality in a registration flow, security trainers demonstrating why common password patterns are vulnerable.
No tutorials. No learning curve. Open it and get started.
No server uploads. Entropy score in bits gives a mathematically meaningful measure — not just a subjective 'weak/medium/strong' label.
Completely free. No trial period. No premium tier for basic functionality. No account required. Use it as often as you need.
One job, done well. Password Strength Analyser was built to solve a specific problem cleanly. No feature bloat, no ads, no distractions.
What is entropy?
Entropy measures the unpredictability of a password in bits. Higher bits = more combinations an attacker must try.
What crack time means?
The estimated time for a powerful computer to try all possible passwords of the same length and character set.
Does it check against breach databases?
Common password pattern detection is included — for breach checking, tools like Have I Been Pwned are recommended.
Is my password sent anywhere?
No — analysis runs entirely in your browser.
What makes a password strong?
Length is the biggest factor, followed by character variety. A random 16-character password beats a 'clever' short one every time.
Free. Instant. No sign-in. Open it and get the job done.
Open Password Strength Analyser on Doathingy.com →