Password Strength Checker
Check how strong a password is. See its estimated strength, entropy, and an estimated time to crack — all checked privately in your browser.
🔒 Checked entirely in your browser — your password is never uploaded.
About the Password Strength Checker
Estimate strength from password length and the character pools detected. The entropy and cracking-time figures are simplified estimates, not a security assessment. Repeated words and predictable patterns can be weaker than the displayed rating; no breach database is checked.
Features
- Character-type and length checks
- Simplified entropy estimate
- Local suggestions
How to use this tool
The Password Strength Checker works right in your browser — no signup, no installation. Follow these steps:
- Type or paste a password into the field.
- See its strength rating, entropy, and estimated crack time update live.
- Read the tips and adjust the password to make it stronger.
- Use a strong result, or generate one with the Password Generator.
Frequently asked questions
How does this tool work?
Estimate strength from password length and the character pools detected. The entropy and cracking-time figures are simplified estimates, not a security assessment. Repeated words and predictable patterns can be weaker than the displayed rating; no breach database is checked.
Using the results
Developers and power users need tools that are exact and private. The Password Strength Checker runs its logic locally in your browser, returns results instantly, and never transmits your input — handy when you are working with keys, hashes, or data you would rather not paste into a remote service.