IconVault's Password Strength checker measures how hard your password really is to crack using entropy math, not guesswork. Type any password and get its entropy in bits, a 5-bar strength meter from Very weak to Very strong, and a breakdown of your character-class pool (lowercase, uppercase, digits, symbols) so you can see exactly what adds strength.

It also shows estimated crack times for three realistic attackers: an online attack with rate limits, a stolen bcrypt hash database, and a stolen fast-hash database attacked with a GPU rig, plus personalized tips on how to make your password stronger. It is free and runs fully in your browser, so your password is analyzed in this tab only and is never sent, stored or logged. The honest caveat: estimates assume random guessing against the full pool, while real attackers try dictionaries, leaks and common patterns first, so a common word falls far faster than the math suggests.