- Enter your password in the field (or generate one).
- See the strength meter — color-coded from red (very weak) to green (very strong).
- Review checks — length, uppercase, lowercase, numbers, symbols, entropy.
- Check warnings — common password detection, repeated/sequential characters.
- See crack time — estimated time to brute-force your password.
What Is the Password Strength Checker?
The Password Strength Checker is a free, privacy-first tool for analyzing the security of your passwords. It evaluates multiple strength factors including length, character variety, entropy, and pattern detection — all without sending your password anywhere.
Key Features
- Visual Strength Meter — Color-coded bar from red (very weak) to green (very strong).
- Entropy Calculation — Measures password randomness in bits.
- Crack Time Estimation — How long it would take to brute-force at 10 billion guesses/second.
- Common Password Detection — Flags the 25 most commonly used passwords.
- Pattern Detection — Warns about repeated characters and sequential patterns.
- Strong Password Generator — Generate 20-character passwords with one click.
- Security Checklist — Visual checks for length, uppercase, lowercase, numbers, symbols.
- 5-Language Support — EN, AR, ES, PT, ZH.
Privacy & Security
This tool is designed with privacy as its core principle. Your password is NEVER sent to any server. All analysis happens entirely in your browser using JavaScript. No data is transmitted, stored, or logged.
Comparison
| Feature | Serverless Tools | haveibeenpwned | password.kaspersky |
|---|---|---|---|
| No Server Upload | 100% local | Hash sent | Password sent |
| Entropy | Yes | No | No |
| Crack Time | Yes | No | Yes |
| Generator | Yes | No | No |