Security ToolsBrowser-only tool
This tool runs sensitive processing in your browser whenever possible, so passwords, tokens, and inputs are not sent to Security Tools servers.
Password Strength Checker
Estimate password strength, warnings, and suggestions in your browser.
Check password strength
Waiting for input
Entropy: 0 bitsLocal analysis only
No password is sent to a server or stored.
Suggestions
- Use at least 12 characters.
- Mix uppercase and lowercase letters.
- Add numbers.
- Add symbols.
Warnings
- No warnings.
How it works
- The checker estimates character set size and entropy.
- It flags short passwords, repeated characters, and common terms.
- The entered password stays in the browser.
FAQ
Is this a breach check?
No. It does not query breach databases.
Can I paste real passwords?
The tool is local, but avoid pasting sensitive passwords into shared devices.