Test your password strength against common attacks.
0 characters
Your password is analyzed locally in your browser and never sent to our servers.
Estimated time to crack: —
Our Password Strength Analyzer evaluates your password based on several security factors
Our analyzer scores your password out of 100 using a combination of length, character variety, and resistance to known attack patterns. It also estimates how long a modern offline attack would take to crack it. The analysis focuses on:
Your password is the single key that protects your email, banking, social media, cloud storage, and everything else you do online. When it fails, everything behind it fails with it. Yet most people still use passwords that can be cracked in seconds.
Attackers rarely sit at a keyboard guessing your password. They run automated tools on GPUs that try billions of combinations per second. Three techniques dominate:
Entropy measures how unpredictable a password is — how many guesses an attacker would need on average. A 12-character password using mixed character classes has roughly 78 bits of entropy. A 16-character one has about 104 bits. Security experts consider 80 bits effectively uncrackable with today's technology.
The math is simple: every extra character multiplies the search space by the size of your character set. That's why 16 lowercase letters (tqxnbfhrwzcplsm) beats 8 mixed characters (Ax7#pQz!) — even though the second one "looks" more complex.
Weak passwords are behind the majority of account takeovers. Once an attacker has access to your email, they can reset the passwords for nearly every other account you own — banking, shopping, work systems, cloud backups. The damage isn't limited to a single service; it cascades.
For businesses, a single compromised employee password can lead to a full network breach, ransomware, data loss, and regulatory fines. Password hygiene isn't optional — it's the first line of defense.
This tool gives you a fast way to see where your current password stands. Combine it with a strong password generator and a password manager, and you'll be safer than 99% of users online.
Yes. The analysis runs entirely in your browser using JavaScript. Your password is never transmitted to our servers or any third party. You can verify this by opening your browser's Developer Tools → Network tab — no requests are made when you type.
Aim for a score of 80 or above (shown as "Strong"). But remember: score is only a rough heuristic. A 20-character lowercase passphrase that scores 70 is often stronger than a shorter password that scores 90.
We assume an offline attack running 10 billion guesses per second — a realistic figure for a modern GPU cracking a weakly-hashed password. Real attackers may be faster or slower depending on the site's hashing algorithm.
It's safe — nothing leaves your device. That said, the strongest habit is to stop reusing passwords entirely and switch to a password manager.
Modern guidance (NIST SP 800-63B) says you don't need to rotate passwords on a schedule. Change them only when there's a reason: after a data breach, if you suspect compromise, or if you've shared one with someone who shouldn't have it.
