Loading…
lock Security Tool
Strong Password Generator
Create cryptographically secure passwords instantly — right in your browser. Nothing is ever sent to our servers.
What Is a Password Generator?
A password generator is a tool that creates random character strings for use as account passwords. Unlike human-chosen passwords — which tend to follow predictable patterns — a generator draws from a configurable character set using a random number algorithm, producing passwords that are statistically resistant to guessing attacks, dictionary attacks, and brute-force cracking.
How It Works
- You choose a length — drag the slider to set the number of characters, from 8 to 64. Longer is always stronger.
- You select character types — check uppercase, lowercase, numbers, symbols, or any combination. Each checked type expands the character pool.
- Click Generate — the tool calls
crypto.getRandomValues(), a browser-native cryptographic API, to select random characters from your pool. This is the same randomness standard used in TLS and cryptographic key generation. - Copy and store — click Copy to send the password to your clipboard, then paste it directly into your password manager or account settings page.
Password Strength by the Numbers
Password strength is measured in entropy — the number of bits of randomness. Higher entropy means more possible combinations, which means more time needed to crack. Here's how length and character set interact:
| Length | Characters Used | Possible Combinations | Strength |
|---|---|---|---|
| 8 | Lowercase only (26) | ~208 billion | Weak |
| 8 | Mixed + symbols (95) | ~6.6 trillion | Fair |
| 12 | Mixed + symbols (95) | ~540 quadrillion | Good |
| 16 | Mixed + symbols (95) | ~44 sextillion | Strong |
| 20 | Mixed + symbols (95) | ~3.6 octillion | Very Strong |
Modern GPUs can attempt hundreds of billions of hashed password guesses per second. An 8-character password can fall in minutes; a 16-character random password would take thousands of years at current computational speeds.
Why Use GlintKit's Password Generator?
Cryptographically Secure
Uses crypto.getRandomValues() — the Web Cryptography API — not Math.random(). The difference matters: Math.random is predictable; crypto is not.
Zero Data Transmission
Every password is generated locally in your browser tab. No network request is made. No server ever sees your password. We have no logs, no database.
Fully Configurable
Control length (8–64 characters) and character set (uppercase, lowercase, numbers, symbols) to match any site's password requirements.
Instant Results
No loading, no signup, no ads between you and your password. Click once, copy, done. Works offline after initial load.
What to Do After Generating a Password
A generated password is only as safe as where you store it. Here's what to do immediately after generating:
- Paste it into a password manager — Bitwarden (free, open source), 1Password, or Dashlane. Never copy it into a note-taking app or spreadsheet. Password managers encrypt your vault and autofill credentials, so you never need to type or remember the password.
- Set it as your account password right now — don't wait. Passwords sitting in your clipboard are accessible to any app that reads the clipboard. Copy → paste → done.
- Enable two-factor authentication (2FA) — a strong password plus 2FA means an attacker would need both your password and your physical device to log in. Use an authenticator app (Google Authenticator, Authy, or the built-in options on iOS/Android) rather than SMS.
- Use a unique password per site — if one site is breached, credential stuffing attacks try the leaked password on thousands of other sites. Unique passwords per account contain the blast radius of any single breach.
Frequently Asked Questions
How long should a strong password be? expand_more
Security researchers recommend a minimum of 16 characters for most accounts, and 20+ characters for high-value accounts like email, banking, and password managers. Length is the single most important factor in password strength — a 20-character random password is billions of times stronger than an 8-character one, even if the 8-character version uses symbols.
Is this password generator safe to use? expand_more
Yes. GlintKit's password generator runs entirely in your browser using the Web Cryptography API (
crypto.getRandomValues), which produces cryptographically secure random numbers. No passwords are ever sent to our servers, logged, or stored anywhere outside your device. You can verify this by opening your browser's network tab while generating — you'll see zero network requests.Should I use a password manager? expand_more
Absolutely. A password manager lets you use a unique, strong password for every account without having to memorize them. You only need to remember one strong master password. Top options include Bitwarden (open source, free), 1Password, and Dashlane. Using a password manager is the single biggest improvement most people can make to their personal security posture.
What makes a password strong? expand_more
A strong password is long (16+ characters), random (not a dictionary word, name, date, or keyboard pattern), and unique (not reused from another site). Including uppercase letters, lowercase letters, numbers, and symbols increases the character set size from 26 to 95, which multiplies the number of possible combinations an attacker must try. Randomness matters more than complexity rules — "Tr0ub4dor&3" is weaker than "correcthorsebatterystaple" because it follows a predictable pattern.
How often should I change my passwords? expand_more
NIST (the US National Institute of Standards and Technology) no longer recommends mandatory periodic password changes. You should change a password if: you suspect it was compromised, you reused it on a site that was breached (check haveibeenpwned.com), or someone else knew it. Unnecessary changes often lead to weaker passwords as users cycle through predictable increments ("password1", "password2") rather than generating truly new ones.