Free browser-only security tool
Password Strength Analyzer
Estimate password entropy, crack-time ranges, and common weak patterns without sending the password anywhere.
- Local analysis
- Entropy estimate
- Pattern warnings
- Crack-time ranges
Strength estimate
Password analysis
Estimated score
94 / 100
- Estimated entropy
- 86 bits
- Length
- 28 characters
- Character variety
- Lowercase, symbols
- Recommendation
- Strong pattern. Keep it unique.
What the analyzer noticed
How a password strength analyzer works
A password strength analyzer estimates how hard a password might be to guess by looking at length, character variety, repeated patterns, common words, and predictable sequences. This tool converts those signals into an estimated entropy score and a practical recommendation.
The result is only an estimate. Real attacks depend on whether the password was reused, whether it appears in leaked lists, how the account provider stores passwords, and whether the attacker is guessing online or has a stolen password hash.
Why length usually beats clever substitutions
People often make passwords look complex by replacing letters with symbols, such as changing "a" to "@" or "o" to "0". Attackers know those substitutions. A longer random password or a passphrase made from unrelated words is usually stronger and easier to use.
For accounts stored in a password manager, a long random password is the simplest choice. For passwords you must type manually, a long passphrase can be easier to enter without making it short or predictable.
What the crack-time estimates mean
The crack-time estimates compare the same password against different guessing situations. Online throttled guessing assumes strict rate limits. Online unthrottled guessing assumes a weaker service with fewer limits. Offline fast-hash guessing assumes the attacker has a stolen hash and can test many guesses per second.
Those scenarios are intentionally broad. Treat them as a teaching aid, not a promise. The safest real-world move is to use unique passwords, store them in a trusted password manager, and enable multi-factor authentication where it is available.
Privacy and safe use
This analyzer runs locally in your browser and does not send your input to Utility Stack. Still, avoid typing real reused passwords into any website. Use sample patterns here, then generate and save a fresh password or passphrase when you are ready to update an account.
If you suspect an account password was exposed, change it on the actual service, sign out other sessions, and review account recovery options. This page is not a breach notification system.