Generate strong, cryptographically random passwords. All generation happens in your browser - passwords are never transmitted anywhere.
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Generated Passwords
About the Password Generator — Strong Random Password Generator
Every password this tool creates uses your browser's built-in crypto.getRandomValues() API — the same cryptographic randomness used by password managers and security software. Generation happens entirely on your device. Nothing is stored, logged, or sent anywhere. Set your length, pick your character types, and generate as many passwords as you need.
The 2024 Verizon Data Breach Investigations Report found compromised credentials in over 80% of hacking-related breaches. Brute-force attacks, credential stuffing, dictionary attacks — they all fall apart against truly random passwords that are long enough. That's what this generator gives you. Not predictable pseudorandom math, but real cryptographic randomness that can't be replicated even with millions of guesses per second.
How to Use the Password Generator
Drag the length slider to set the desired password length (4–128 characters). For most accounts, 16–20 characters is the recommended minimum.
Check or uncheck character sets: uppercase letters (A–Z), lowercase letters (a–z), numbers (0–9), and symbols (!@#$%^&* etc.).
Optionally enable Exclude Ambiguous Characters to remove visually similar characters (0, O, l, 1, I) — useful if you ever need to type the password manually.
Choose how many passwords to generate simultaneously — useful for creating multiple account passwords in one batch.
Click Generate New to refresh all passwords, or use the copy button next to any individual password to copy it directly.
How the Random Password Generator Works
Random bytes are generated using window.crypto.getRandomValues() — the same cryptographically secure API used by password managers and security tools. Characters are selected uniformly from the enabled character set using rejection sampling (discarding values that would introduce statistical bias), ensuring each character position is equally likely to be any character from the set. This is meaningfully different from Math.random(), which is a predictable pseudorandom generator that should never be used for security purposes.
Password Strength Guidelines
Weak: < 8 characters. Fair: 8–11 characters with mixed types. Strong: 12–15 characters with uppercase, lowercase, and numbers. Very Strong: 16+ characters with all character types including symbols. For maximum security (banking, email, password manager master password), use 20+ characters with all options enabled.
Tips for Creating and Managing Strong Passwords
Use a different password for every account: The biggest risk from a breach isn't the one compromised account — it's credential stuffing, where attackers try the same username and password across dozens of other services. One reused password can cascade into many takeovers. Generating unique passwords takes seconds here.
Store passwords in a password manager: A 20-character random password isn't meant to be memorised. Use a reputable password manager (Bitwarden, 1Password, KeePass) to store them all, securely encrypted. You only need to remember one strong master password.
Generate at least 16 characters for any account that matters: A 16-character password using all character types has roughly 105 bits of entropy. At a billion guesses per second — a realistic speed for offline attacks against weak hashes — it would take longer than the age of the universe to crack. Shorter passwords are dramatically more exposed.
Enable symbols for maximum entropy: Adding symbols expands the character set from 62 to 94 characters. For a 16-character password, that pushes possible combinations from 47 quadrillion to 475 quadrillion — about 10× harder to brute-force.
Use the ambiguous character exclusion for manually-typed passwords: If you have to type a password by hand — on a TV, console, or device without clipboard access — enable "Exclude Ambiguous Characters" to drop visually similar characters (0/O, l/1/I, S/5, B/8). At 16+ characters, this doesn't meaningfully reduce security.
Frequently Asked Questions about Password Generator
Yes. This generator uses crypto.getRandomValues() — a cryptographically secure pseudorandom number generator (CSPRNG) from the browser's Web Crypto API. Unlike Math.random(), which is predictable and never suitable for security use, crypto.getRandomValues() draws randomness from operating system entropy sources. A 16-character password with all character types has around 105 bits of entropy — well beyond what current or foreseeable hardware can brute-force.
No. Generation happens entirely in your browser tab. Nothing touches localStorage, session storage, or cookies. Nothing goes to any server. There's no analytics capturing generated values. Once you close or refresh the page, the passwords are gone — so copy what you need into a password manager before you navigate away.
NIST recommends at least 16 characters for important accounts. For critical ones — banking, primary email, your password manager's master password, work accounts — go to 20 or more. Length matters more than character variety: a 20-character lowercase-only password is harder to crack than a 10-character password using every character type. When in doubt, go longer.
Entropy measures how unpredictable a password is, expressed in bits. Each added bit doubles the number of combinations an attacker needs to try. A 16-character password using all character types (94 possible per position) has roughly 105 bits of entropy — considered extremely strong. Both password length and character set size determine entropy, which is why this tool shows the entropy value as you adjust the slider.
Yes, if the site allows it. Symbols push the character pool from 62 (letters + numbers) to 94, making each position about 1.6× harder to guess. Some older systems reject certain symbols or have strict character restrictions — if a site rejects your generated password, try regenerating with symbols off, or adjust which sets you've enabled.
Yes — completely free, no account, no download, no limits. Works in Chrome, Firefox, Safari, and Edge on desktop and mobile. Everything happens in your browser tab with no server round-trip. Generate as many passwords as you want.
A random password like "Kx9#mL2!vQpR4@nZ" has maximum entropy for its length but can't be memorised. A passphrase like "correct-horse-battery-staple" uses common words but achieves high entropy through sheer length. For anything stored in a password manager, use long random passwords — they're stronger. Reserve passphrases for the one password you actually have to remember, like your password manager's master password.
Yes — the slider, checkboxes, and copy buttons all work on touchscreens. The layout adapts to smaller screens without losing any functionality. Works on iOS Safari and Android Chrome. Tap the copy icon next to a password to copy it to your clipboard, then paste it straight into your password manager or sign-up form.