'password123' and 'P@ssw0rd' are in every breach wordlist. Humans are terrible at creating random passwords — we use patterns, dictionary words, and predictable substitutions. Cryptographic random password generation removes human bias entirely.
What Is Password Generator?
A secure password generator uses a cryptographically secure random number generator (CSPRNG) to select characters from defined sets — uppercase, lowercase, digits, and symbols. Our Password Generator creates passwords with measurable entropy, entirely in your browser.
How to Use Password Generator on DevToolHub
- Open the Password Generator tool on DevToolHub — no signup required.
- Paste or enter your input data in the left panel.
- See the result instantly in the output panel.
- Copy the result or download it as a file.
Password Entropy Comparison
Not all passwords are created equal:
// Weak: 8 chars, lowercase only (38 bits entropy)
"kittenpaw" → cracked in seconds
// Medium: 12 chars, mixed case + digits (71 bits)
"xK9mR2pL4nWq" → cracked in years
// Strong: 20 chars, all character types (131 bits)
"aX#9kM$2pL&4nWq!8zBv" → cracked in centuries
// Best: passphrase (high entropy, memorable)
"correct-horse-battery-staple" → 99 bits, easier to typePro Tips
- Use at least 16 characters for important accounts — length beats complexity
- A random passphrase (4+ dictionary words) is both strong and memorable
- Never reuse passwords across services — one breach exposes all your accounts
- Store generated passwords in a password manager — don't try to memorize random strings
When You Need This
- Creating secure credentials for new accounts and services
- Generating API keys and secret tokens for applications
- Creating temporary passwords for user onboarding flows
- Building password generation features into your own applications
Free Tools Mentioned in This Article