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- At least 8 characters
- Uppercase letter (A–Z)
- Lowercase letter (a–z)
- Number (0–9)
- Special character (!@#$…)
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Password Generator
Generate a strong password instantly. Optionally enter a base word (e.g. Dog) and the tool will complete it with extra characters to make it secure.
Your password is never stored or transmitted. All calculations happen locally in your browser.
Why Password Strength Matters
Weak Passwords Are Easily Hacked
Simple or short passwords can be cracked in seconds using brute-force or dictionary attacks. Hackers use automated tools that can test millions of combinations per second.
Length Makes a Big Difference
Every additional character exponentially increases the number of possible combinations. A 12-character password is astronomically harder to crack than an 8-character one.
Character Variety Boosts Security
Mixing uppercase, lowercase, numbers, and symbols dramatically expands the search space for attackers, making your password far more resistant to automated cracking.
5 Tips for a Stronger Password
Use at least 12 characters
Longer passwords provide exponentially more security. Aim for 16+ characters for sensitive accounts.
Avoid common words
Dictionary words, names, and predictable patterns are the first things hackers try. Be creative and unpredictable.
Never reuse passwords
Using the same password across multiple sites means one breach can compromise all your accounts at once.
Mix numbers and symbols
Combining letters with numbers and special characters like !@#$% makes your password far harder to guess or crack.
Use a password manager
A good password manager generates and stores unique, complex passwords for every site — so you only need to remember one master password.
How This Password Checker Works
This tool evaluates your password in real time using four key factors:
- Length — Longer passwords are exponentially harder to crack. Every extra character multiplies the number of possible combinations an attacker must try.
- Character variety — Mixing uppercase, lowercase, numbers, and symbols expands the possible character set, making brute-force attacks far less effective.
- Randomness — Passwords with repeated characters or predictable patterns score lower, since attackers exploit common sequences first.
- Entropy — Measured in bits, entropy quantifies unpredictability. Higher entropy means more possible passwords and a stronger defence against guessing attacks.
All analysis runs entirely in your browser — no data is ever sent to any server.
Password Security FAQ
What makes a password strong?
A strong password combines length (12+ characters), character variety (uppercase, lowercase, numbers, symbols), and unpredictability. Avoid dictionary words, names, or obvious substitutions like "p@ssw0rd" — automated tools account for these patterns.
How long should a secure password be?
Security experts recommend at least 12 characters for general accounts and 16 or more for sensitive ones like banking or email. Each additional character dramatically increases the time required to crack it through brute force.
How do hackers crack passwords?
The most common methods are brute-force attacks (trying every possible combination), dictionary attacks (testing common words and known passwords), and credential stuffing (reusing passwords leaked in data breaches). A long, unique, random password defeats all three approaches.
Is a long password better than a complex one?
Both matter, but length generally has the bigger impact. A 20-character password of random lowercase letters is harder to crack than an 8-character mixed-character password. The ideal password is both long and varied — combining length with character diversity gives you the strongest protection.