Password Generator
Create strong, random passwords instantly.
About Password Generator
Create strong, random, and secure passwords online for free with a single click. This password generator uses your browser's cryptographically secure random number generator to build passwords that are extremely hard to guess or brute-force, and you can customize the length and mix of uppercase letters, numbers, and symbols to match any site's requirements. Nothing is ever sent over the internet - passwords are generated locally on your device and never stored or logged - making this a safe way to create unique passwords for every account you own.
How to use this tool
- 1Choose your desired password length using the slider.
- 2Toggle uppercase letters, numbers, and symbols on or off.
- 3Click Generate to create a new random password.
- 4Click Copy to copy the password to your clipboard.
How password length affects cracking time
Every character you add multiplies the number of guesses an attacker must make. The table below shows rough offline brute-force times for a random password using letters, numbers, and symbols (≈94 possible characters), assuming a powerful attacker testing 100 billion guesses per second.
| Length | Combinations | Time to crack |
|---|---|---|
| 8 characters | ≈ 6 × 10¹⁵ | Under a day |
| 10 characters | ≈ 5 × 10¹⁹ | Around 17 years |
| 12 characters | ≈ 5 × 10²³ | Over 150,000 years |
| 14 characters | ≈ 4 × 10²⁷ | Over a billion years |
| 16 characters | ≈ 4 × 10³¹ | Longer than the age of the universe |
This is why length beats cleverness: a 16-character random password is effectively uncrackable by brute force, while a short 'complex' one like P@ssw0rd! falls instantly to dictionary attacks. Note these numbers assume truly random passwords - human-chosen patterns are dramatically weaker.
Frequently asked questions
Are these passwords safe to use?
Yes. Passwords are generated locally in your browser using the cryptographically secure Web Crypto API and are never sent to any server.
How long should my password be?
For most accounts, 16 characters with a mix of letters, numbers, and symbols is a strong choice. Use longer passwords for high-value accounts.
Related guide
5 min readHow to Create Strong Passwords (and Actually Remember Them)
A practical guide to strong passwords: what makes them secure, common mistakes to avoid, and how to generate and remember them.