Generate a strong 16-character password
Generate cryptographically secure 16-character passwords with mixed case, digits, and symbols. Uses crypto.getRandomValues() — no logging.
Generate a strong 16-character password
16 characters with all four character classes (upper, lower, digits, symbols) is the current NIST-suggested baseline for a strong password — assuming you're storing it in a password manager and never typing it by hand. The entropy is more than enough to make offline brute-force impractical even with specialised hardware. This preset pre-configures the generator for that shape; each click gives a fresh password, never logged.
What is Generate a strong 16-character password?
Generate cryptographically strong passwords that respect your specific requirements: length, character classes (lowercase, uppercase, digits, symbols), and whether to exclude ambiguous characters (like O and 0). Uses the browser's Web Crypto API (crypto.getRandomValues), not Math.random — so the output is genuinely unpredictable, not just pseudo-random. Generate multiple at once for a whole rotation.
How do I use Generate a strong 16-character password?
- Set the length (12-64 recommended).
- Toggle character classes: lowercase, uppercase, digits, symbols.
- Click Generate for a fresh password.
- Copy or download the output.
Generate a strong 16-character password by the numbers
- RNG
- crypto.getRandomValues()
- Length range
- 4–128 characters
- Character classes
- Upper, lower, digits, symbols, ambiguous exclusion
- Entropy meter
- Live zxcvbn score
- Storage
- None — in-memory only
Common use cases for Generate a strong 16-character password
- Generating a 20-character Wi-Fi password for a small-office router.
- Creating a unique password per site for use in a password manager.
- Producing a memorable 5-word diceware passphrase for a master password.
- Spinning up 50 user seeds for a staging database.
- Getting a numeric PIN of exact length for a device lock.
Common pitfalls and how to avoid them
- Same password appears twice — Each click produces a fresh generation. If you see duplicates, you copied the old buffer — click Regenerate and copy again.
- Site rejects the password — Check the site's allowed characters. Toggle off symbols (or specific ones) to match their policy.
- Forgot the password after closing — We never store passwords. Paste into a password manager (1Password, Bitwarden, KeePass) before leaving the page.
When should I use Generate a strong 16-character password?
Password Generator is for creating new passwords. To check the strength of an existing password, use Password Strength. For hashing rather than generating, use Hash Generator.
Is 16 characters overkill?
For everyday accounts, possibly — 14 mixed characters is also solid. For banking, admin, or encryption keys, 16+ is the safer default.
Some sites reject my password.
Check the site's allowed characters. Toggle off specific symbols (e.g. & or ") that some sites forbid.
Is my file uploaded anywhere?
No. Everything runs in your browser — the file never leaves your device, and there is no server component for this tool.