Strength score
A simple learning score from 0 to 4, based on the random-character model and a few pattern checks. It is not a professional password audit.
INTERACTIVE SECURITY LEARNING
Understand password strength.
See what matters.
Try a made-up password and explore its length, character types and predictable patterns. Learn what these signals tell you—and what a simple checker cannot know.
Use made-up examples only.
Never enter a real account password. The sample buttons
below are for learning, not for use on an account.
Try the password checker
Results update as you type. No account or submission needed.
Maximum 128 characters. Examples stay in this page’s memory.
Try a sample:
Try an example
— / 4
Type a made-up password or choose a sample to begin.
Password length
0
Unicode code points, including spaces.Random-character model
—
Model bits, not measured password entropy.Model search space
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Possible combinations under this model.Illustrative guessing time
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Average at 100 billion guesses/second.Time and search-space values assume independent random characters. They are not predictions for human-created passwords. Common phrases and patterns can be much easier to guess. Non-ASCII examples do not receive these estimates.
What we noticed
- ○ Lowercase: waiting for an example
- ○ Uppercase: waiting for an example
- ○ Numbers: waiting for an example
- ○ Symbols: waiting for an example
- ○ Patterns: waiting for an example
Character types are observations, not a required checklist. This basic demo checks only a small set of patterns. It does not check leaked-password databases.
MAKE SENSE OF THE NUMBERS
What do these results mean?
Search space and bits
The model counts possible strings using the detected character groups. Its bits describe that mathematical space, assuming each character is chosen randomly.
Guessing time
An illustration using a fixed guessing rate. Actual attacks depend on the password’s predictability, hashing method, hardware and account protections.
Questions you might have
Why can a long password still be predictable?
Length alone does not describe how a password was selected. A famous quote, familiar phrase or repeated word may be tried much earlier than a random string of the same length.
Does this tool actually crack passwords?
No. It examines the example you enter and calculates educational estimates. It does not attempt logins, run attacks or contact another system.
Why are estimates hidden when a pattern is detected?
The random-character assumption is a poor fit for an obvious pattern. Rather than show a misleading time, the tool explains that predictable guessing can be much faster.
Can I use one of the sample passwords?
No. They are public examples shown to every visitor. Use them only to explore how the checker works.