Test password strength with entropy calculation and crack time estimates. All processing done locally.
Type or paste a password into the checker. It runs entirely in your browser — your password is never sent to any server.
The tool evaluates your password against common patterns, dictionary words, length, and character diversity. See an instant strength rating from Weak to Very Strong.
If your password scores low, the tool will tell you why — too short, no symbols, common word detected. Edit your password manager entry to strengthen it.
Use our Password Generator to create a strong, random password that scores Very Strong, then update your stored password.
The Password Strength Tester is part of LaiUse's growing collection of password generator, hash generator, security tools. Like every tool on LaiUse, it runs entirely in your browser — meaning your data, files, and inputs stay on your device throughout the entire process.
LaiUse offers Security tools alongside embed jwt decoder, embed password generator, embed password strength tester. The entire platform is free to use with no signup required, making it a popular choice for developers, designers, and everyday users who need a quick tool without the overhead of a SaaS subscription.
Whether you need the password strength tester for a one-off task or as part of your regular workflow, LaiUse is designed to be fast, reliable, and private. Bookmark this page to come back anytime, or explore the rest of the Security category for related tools.
Nowhere. Passwords are generated in your browser and never sent to any server. The moment you close or refresh the page, the password is gone.
Length is the most important factor. A 16-character password with mixed case, numbers, and symbols is computationally infeasible to crack with current technology.
Yes. Use this tool to generate strong passwords, then store them in a reputable password manager like Bitwarden, 1Password, or KeePass. Never reuse passwords across sites.