Password Strength Checker
Password Strength Checker is a free online calculator that helps you estimate password entropy and crack time; checked entirely locally, nothing uploaded. Password Strength Checker uses 1 input field, returns 5 output values, and runs in your browser on the device.
Key facts
- Inputs
- 1 field: Password
- Outputs
- 5 values: Score, Entropy (bits), Character pool, Online crack (1k/sec), and Offline crack (10B/sec)
- Runtime
- your browser on the device
- Mode
- Calculator
- Privacy
- Files and text stay in the browser session.
- Cost
- $0, no account required
How to use Password Strength Checker
- 1
Paste or fill in the input
Enter your text or values into the input fields on the page.
- 2
Run the utility
Click Compute to run the utility in your browser and review the result.
- 3
Copy the output
Copy the output value you need from the result panel.
Password Strength Checker details
First, enter Password in Password Strength Checker. Next, review Score, Entropy (bits), Character pool, Online crack (1k/sec), and Offline crack (10B/sec). Additionally, Password Strength Checker uses 1 input field and 5 output blocks so the result is easy to scan and copy.
Type a password and see its character pool size, entropy in bits, a 0;4 strength score, and crack-time estimates for both online (1,000 guesses/sec) and offline (10 billion guesses/sec) attacks. Password Strength Checker runs in your browser; the password is never transmitted.
Common searches
- password strength checker
- password strength meter
- password entropy calculator
- password crack time
- how strong is my password
- password tester
Related tools
Tools that work with the same formats — most users open one of these next.
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Frequently asked
What is Password Strength Checker?
Password Strength Checker is a free online calculator that helps you estimate password entropy and crack time; checked entirely locally, nothing uploaded. Password Strength Checker uses 1 input field, returns 5 output values, and runs in your browser on the device.
What inputs and outputs does Password Strength Checker use?
Password Strength Checker uses 1 input field: Password. Password Strength Checker returns 5 output values: Score, Entropy (bits), Character pool, Online crack (1k/sec), and Offline crack (10B/sec).
Do my files and data stay private?
Yes. Password Strength Checker runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How do I use Password Strength Checker?
Open Password Strength Checker, paste or fill in the input fields, and the result updates instantly. Password Strength Checker runs in your browser with no upload and no waiting.
Which browsers does Password Strength Checker support?
Any modern browser works in Chrome, Firefox, Safari, and Edge on desktop and mobile. Password Strength Checker uses standard web APIs and does not require any plugin, extension, or sign-up.