Password Generator
Create strong, random passwords. Everything runs in your browser — nothing is uploaded or stored.
Select at least one character setGenerated locally using your browser's cryptographically-secure random generator. Passwords never leave your device.
About the Password Generator
Generate random passwords drawn from your browser's cryptographically secure random number generator — the same class of entropy trusted for key material — with modulo bias engineered out so every character in your chosen pool is equally likely. Set a length up to 64 characters, pick your character sets, optionally exclude look-alike glyphs like I, l, and 1 for readability, and watch the live strength meter recalculate as you adjust. Nothing is transmitted, logged, or stored anywhere.
Length beats cleverness
Every extra character multiplies the search space an attacker must brute-force, which makes length the lever that matters most. With all four sets enabled — upper, lower, digits, symbols — the pool holds roughly ninety characters, so each added position multiplies guesses about ninety-fold. A twelve-character draw lands near eighty bits of entropy; sixteen clears one hundred bits, beyond anything brute force can realistically touch. Substitution rules that demand a symbol in position three mostly add memorization pain for humans while barely moving the mathematics for attackers.
Randomness you can trust
The usual Math.random is fine for games and hopeless for credentials: its sequence is technically predictable given enough observed output. This generator draws from crypto.getRandomValues, the operating system's cryptographically secure source, and applies rejection sampling to eliminate modulo bias — the subtle skew you get when a random range is not evenly divisible by the character-pool size, which quietly makes some characters more frequent than others. That uniformity is not pedantry; a skewed pool shrinks effective entropy below what the length alone suggests, so even draws are the entire security claim. The result: every position independently picks from the full pool you selected, with no character favored over any other.
Random strings versus passphrases
Four genuinely random dictionary words deliver comparable entropy to a shorter random string while staying pronounceable enough to read aloud or type on a phone keyboard. Random strings win wherever software does the typing — API keys, database credentials, Wi-Fi pre-shared keys, service accounts. For passwords you personally enter daily, weigh whether a passphrase from a dedicated method beats a symbol-studded string; the worst option is a memorable-looking pattern invented by a human, because human-chosen structure is exactly what cracking dictionaries model.
One password per account
Reuse is how a single breached forum password becomes a compromised email inbox, and from there everything else. Generate a unique credential per account and let a reputable password manager remember them all — you only ever memorize the manager's master passphrase. Copying from this page straight into a manager entry keeps the loop tight. And since generation happens entirely in transient browser memory with no transmission, the strongest password this tool produces never has a chance to leak in transit.
Video slot: password-generator-walkthrough.mp4
Adjusting the length slider and character sets while the entropy meter updates, then copying the generated password.
Coming soonHow to Use Password Generator Online
Follow these simple steps to use Password Generator securely in your web browser.
- 1
Choose and Configure Options
Select password length (8 to 64 characters) and check character set checkboxes.
01-password-generator-choose-and-configure-options.png
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- 2
Generate Password
Click generate to produce a cryptographically random password instantly.
02-password-generator-generate-password.png
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- 3
Copy and Save Password
Click copy to save the generated password securely to your clipboard.
03-password-generator-copy-and-save-password.png
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Features & Specifications
RNG Engine
crypto.getRandomValues (CSPRNG)
Character Sets
Uppercase, Lowercase, Numbers, Symbols
Entropy Calculation
Log2(Charset^Length) bits
Privacy Status
100% In-Browser Local Processing
100% Free & Private In-Browser Processing
Rupix operates on a zero-upload architecture. All computations, file parsing, and transformations occur locally inside your web browser. No document bytes, sensitive text, or personal data are ever uploaded or transmitted to remote servers.
Why use Rupix Password Generator?
CSPRNG Randomness
Uses window.crypto.getRandomValues for true cryptographic unpredictability.
Entropy Strength Meter
Real-time bit-entropy score calculating resistance against brute-force attacks.
Zero Logging
Passwords exist only in transient browser memory and are never saved.