Free Password Strength Checker Online
Use this free password strength checker to estimate how strong a password is. Private — nothing is sent or stored.
What is Password Strength Checker?
Password Strength Checker estimates a password's strength from its length and character variety, showing a score and tips to improve it. It runs entirely in your browser and never stores or transmits what you type.
How to use this tool
- Type or paste a password.
- Read the strength score and tips.
- Adjust until it is strong.
Features
- Strength score and label
- Estimated entropy in bits
- Actionable improvement tips
- Checked locally — never stored
- Runs entirely in your browser
This tool runs in your browser. Your files and text are not uploaded to our servers, and we do not store your input.
Frequently asked questions
Is my password sent anywhere?+
No. It is checked entirely in your browser and is never stored or transmitted.
How is strength measured?+
From length and character variety, expressed as an estimated entropy and a score.
What makes a password strong?+
Length above all, plus a mix of character types and no common words.
Related tools
Looking for more Productivity Tools?
Browse the full collection of free, browser-based tools.