Password strength analyser
Estimates password strength and approximate cracking time, to judge whether a password is good enough.
Discover the strength of your password with this client-side-only password strength analyser and crack time estimation tool.
Steps and notes
What is Password strength analyser?
Analyse a password's strength entirely in your browser — entropy, common-pattern checks and a crack-time estimate. Nothing is submitted anywhere, so it is safe to probe the passwords you actually use; the point is to see which weaknesses (length? reuse? predictable structure?) dominate your risk.
- Enter the password to evaluate
- Read the strength bar and estimated cracking time
- Lengthen it or add character classes as suggested
- The calculation runs entirely in your browser; the password is never sent anywhere
Frequently asked questions
- How is "time to crack" estimated?
- It models an attacker guessing at some rate (billions per second for offline attacks on a stolen hash). The estimate is orders-of-magnitude, not a prophecy — relative comparisons between passwords are what matter.
- Is a complex short password better than a long simple one?
- Usually not. Length dominates: a four-word passphrase outruns a 9-character symbol soup because entropy grows with every added character of vocabulary, not only with symbol variety.
- Does the tool store or transmit my password?
- No — the analysis runs client-side and the input never leaves the page. Still, measuring a password on any shared machine carries some risk; prefer your own device.
Category: Crypto
Hashing & crypto workflow
Hash Generator — MD5, SHA-1, SHA-256 Online → HMAC Generator — Sign Messages with SHA-256 Online → Bcrypt → Encrypt / decrypt text → RSA Key Pair Generator → Password strength analyser → htpasswd generator and checker