Password Generator
Generate cryptographically secure passwords using window.crypto. Configure length and character sets, exclude ambiguous chars. Includes strength meter.
Character Sets
Quick Presets
Bulk Generate
Password Entropy Guide
Disclaimer: Free tool provided “as is” by MonitorGiant. No warranty or liability for any data loss, security issues, or infrastructure problems arising from use of this tool. Results are for informational purposes only. · A Free Tool by MonitorGiant
What is Password Generator?
The Password Generator creates cryptographically secure random passwords using your browser's built-in Web Crypto API (window.crypto.getRandomValues). This is the same source of randomness used by operating systems for security-sensitive operations — not a pseudo-random number generator. Passwords are generated entirely in your browser and never transmitted anywhere.
How to use this tool
- 1 Set the password length using the slider — 16 characters or more is recommended for most accounts.
- 2 Toggle the character sets you want: uppercase letters, lowercase letters, numbers, and symbols.
- 3 If needed, enable 'Exclude ambiguous characters' to avoid 0/O and 1/l/I confusion.
- 4 Click 'Generate' (or use the auto-generate on load) to create a new password.
- 5 Click the copy icon to copy the password to your clipboard, or use 'Generate Multiple' for a bulk list.
When would you use this?
- Creating a new account on any website and you want a password that can't be guessed or brute-forced with a dictionary attack.
- Rotating credentials for a server, database, or API key where entropy and uniqueness are critical.
- Generating a master password for a password manager, where the password must be both strong and memorable enough to type occasionally.
Frequently asked questions — Password Generator
Is this password generator secure?
Yes. All passwords are generated using window.crypto.getRandomValues(), which is your browser's cryptographically secure pseudo-random number generator (CSPRNG). This is the same source of randomness used by operating systems for security-critical operations. The generated passwords are never transmitted to any server — they exist only in your browser's memory.
What makes a strong password?
A strong password has high entropy — meaning it is long, uses a large character set, and has no predictable patterns. Aim for at least 16 characters combining uppercase letters, lowercase letters, numbers, and symbols. Avoid dictionary words, names, dates, or keyboard patterns like 'qwerty'. A password's strength is measured in bits of entropy: each additional character from a larger character set multiplies the number of possible combinations an attacker must try.
Does this tool store my password?
No. This tool runs entirely in your browser and generates passwords locally using the Web Crypto API. No password is ever sent to a server, logged, or stored anywhere. Once you close or refresh the page, the generated password is gone — which is why you should copy it immediately and store it in a password manager.
How Password Generator works
- 1
Choose your settings
- 2
Use a preset
- 3
Generate and copy
Passwords are generated using window.crypto.getRandomValues() — a cryptographically secure RNG. Nothing leaves your browser.
Need a secure random password generator with a custom length, no special characters, or a specific character set? Current security guidance recommends at least 16 characters combining uppercase, lowercase, numbers, and symbols. This tool uses window.crypto.getRandomValues() — a cryptographically secure RNG — ensuring every password is truly random, not pseudo-random. The entropy readout tells you exactly how hard the password is to brute-force: 128 bits is considered computationally infeasible with any hardware available today.
Comments & Feedback
Found a bug? Have a suggestion? We'd love to hear from you.
Related Tools
From the makers of this tool
Need deeper observability?
MonitorGiant tracks real-time AI performance, infrastructure health, and system reliability — far beyond what free utilities can show.