Alphanumeric password generator
Letters and digits only — no symbols that some systems do not accept.
Everything runs in your browser: your input and files are never uploaded.
How to use
- Pick a length: 16 characters is enough for most sites.
- Keep only the character sets the site allows.
- Click “Copy” and store the password in a password manager.
- Need to remember it? Switch to a passphrase made of several words.
FAQ
When do I need a password without symbols?
When a system rejects symbols or they are awkward to type, for example on a TV or in older software.
Is it secure?
Slightly weaker than a password of the same length with symbols; add 2–3 characters to compensate.
Are passwords stored on a server?
No. Passwords are generated in your browser with the cryptographically secure crypto.getRandomValues and are never transmitted.
How long should a password be?
At least 12 characters with all character sets. For email, banking and work accounts use 16 or more.
Why exclude similar characters?
To make the password easy to type by hand: 0 and O, 1, l and I are easy to confuse.
What is a passphrase?
Several random words in a row, like “Lake-Moon-Rich-Tune”. It is easier to remember, and with 5–6 words it is as strong as a long password.
What are “bits of entropy”?
A measure of unpredictability. Each extra bit doubles the number of guesses needed. 64+ bits is strong, 100+ bits is very strong.