Secure Random Password Generator – Strong Passwords in Your Browser
Random passwords from `crypto.getRandomValues`, custom length 8–64, optional character classes. Local only.
Pattern tips (illustrative only)
K7#mQ2vL9nR4wX8!correct-horse-battery-staple-92vN4!kR8@zL1#qW5aB3dE6fG9hJ2kM5Prefer a password manager for storage. Regenerate above until the strength bar and character rules match what your service requires.
About Password Generator
Builds a charset from toggles (upper, lower, digits, symbols), fills length slots with indices from `crypto.getRandomValues` modulo charset length. No password leaves the page.
How it works (technical)
API: `crypto.getRandomValues(new Uint32Array(length))`; each byte picks `charset[i % charset.length]`.
Strength bar: heuristic score from length and character-class presence—not a formal entropy meter.
Requires at least one character class selected or generation aborts with on-screen message.
When to use it
One-off logins
Generate a random string when a site asks for a new password.
Test data
Produce arbitrary alphanumeric strings for fixtures (not for production secrets without review).
WiFi or device defaults
Long random strings when replacing factory passwords—store them in a password manager.
How to Use Password Generator
- 1Set your desired password length using the slider (8-64 characters).
- 2Select which character types to include (uppercase, lowercase, numbers, symbols).
- 3Click "Generate Password" to create a new secure password.
- 4Click "Copy" to copy the password to your clipboard.
Key Features
- `getRandomValues` index into combined charset
- Length slider 8–64
- Optional A–Z, a–z, 0–9, symbol sets
- Copy to clipboard
Benefits
- •Cryptographic RNG in modern browsers
- •No server sees the string
- •Adjust length to match site rules
Frequently Asked Questions
How secure are the generated passwords?
Our passwords are generated using the Web Crypto API, which provides cryptographically secure random values. This means the passwords are truly random and virtually impossible to predict or crack through brute force.
What is a good password length?
We recommend at least 16 characters for important accounts. For maximum security, use 20+ characters. Longer passwords are exponentially harder to crack.
Are my generated passwords stored anywhere?
No. All password generation happens entirely in your browser. We never see, store, or transmit your passwords. Once you leave the page, the password is gone unless you saved it.
Should I use symbols in my password?
Yes, including symbols significantly increases password strength. However, some websites restrict certain symbols. If a password is rejected, try generating one without symbols.