Password Generator
Generate strong, random passwords with custom length, complexity and character sets.
What Is a Password Generator?
A password generator creates cryptographically random passwords that are much harder to crack than anything a human would invent. Weak or reused passwords are the leading cause of account breaches — using a random, unique password for every account significantly reduces your risk.
This tool uses the browser's crypto.getRandomValues() API, which produces true cryptographic randomness — not Math.random(). Your passwords never leave your device.
How to Use This Tool
1. Set the length — drag the slider between 8 and 64 characters. Longer passwords are exponentially stronger.
2. Choose character sets — enable uppercase, lowercase, numbers, and symbols for maximum complexity. Enable "Exclude Ambiguous" to avoid characters like 0, O, and l that look similar in some fonts.
3. Set the count — generate up to 20 passwords at once to pick the most memorable one.
4. Click Generate — review the strength meter and entropy estimate, then click the copy icon next to any password.
When Do You Need Strong Passwords?
Every account deserves a unique, strong password — especially email, banking, social media, cloud storage, and password manager master passwords. Use a dedicated password manager (Bitwarden, 1Password, etc.) to store the generated passwords securely so you only need to remember one master password.
Frequently Asked Questions
How long should a password be?
At minimum, 12–16 characters for everyday accounts. For sensitive accounts (email, banking), aim for 20+ characters. A 20-character password with all character sets has over 130 bits of entropy — effectively uncrackable with current technology.
Is it safe to generate passwords in a browser?
Yes — this tool generates passwords entirely in your browser using window.crypto.getRandomValues(). No data is ever sent to any server. You can even use it offline once the page is loaded.
What does "Exclude Ambiguous Characters" do?
It removes characters that look alike in certain fonts: 0 and O (zero vs capital O), l, 1, and I (lowercase L, one, capital I), and S vs 5. Useful if you ever need to type a password manually rather than paste it.
What is password entropy?
Entropy measures unpredictability in bits. It is calculated as log₂(pool_size) × length. Higher entropy means more possible combinations, making brute-force attacks infeasible. 60+ bits is good; 80+ is excellent; 100+ is considered extremely strong.
Should I use symbols in passwords?
Yes, symbols dramatically increase the character pool from ~62 to ~95 characters per position. However, some older systems or certain fields don't accept all symbols — if a password is rejected, try regenerating without symbols or limit the custom character set.
Why shouldn't I create passwords myself?
Humans are predictable. Studies show people gravitate toward keyboard patterns, dictionary words, birthdates, and common substitutions (like @ for a). Attackers use these patterns in dictionary and rule-based attacks. Truly random passwords sidestep all of these vulnerabilities.