Password Strength Tester
Password Strength Tester is a free online Security Tools tool that estimate entropy and crack-time of a password instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.
Description
Estimate entropy and crack-time of a password.
- Because everything is computed client-side, Password Strength Tester is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using Password Strength Tester takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Examples
These ready-made examples show typical inputs and the exact output Password Strength Tester produces for them.
Tr0ub4dor&3
Entropy estimate.
Use cases
Common situations where Password Strength Tester helps:
- Estimate entropy and crack-time of a password.
- Because everything is computed client-side, Password Strength Tester is safe to use with sensitive data such as API keys, tokens or private logs.
FAQ
What is Password Strength Tester?
Password Strength Tester estimate entropy and crack-time of a password. It runs entirely in your browser, so your data stays private.
Is Password Strength Tester free to use?
Yes. Password Strength Tester is free, unlimited and works without registration or installation.
Does my data get uploaded?
No. All processing happens locally in your browser; nothing is sent to any server.