Password security best practices
A strong password generator helps you pick secrets that are hard to guess and hard to brute-force. Length matters: each extra character multiplies the search space when attackers try every combination. Combining uppercase, lowercase, numbers, and symbols increases the size of the “alphabet” your password draws from, which raises entropy — a measure of unpredictability. Our tool estimates entropy as length × log₂(pool size), which assumes every character is chosen uniformly at random from the allowed set (after your exclusions).
Why use unique passwords?
Reusing one password across sites means a single breach elsewhere can put your other accounts at risk. Prefer a unique strong password per important account, or use a reputable password manager to store and fill them. This page is a random password generator that runs entirely in your browser: we do not receive your passwords, log them, or store them on a server.
Ambiguous characters and readability
Characters like 0, O, l, 1, and I are easy to misread when you type them from a screenshot or handwritten note. Optional exclusion reduces confusion when you must read a password manually — at a small cost to pool size and entropy, which you can offset with slightly longer passwords.
Quick checklist
- Use long passwords (16+ characters) for email, banking, and work accounts.
- Enable multi-factor authentication (MFA) wherever offered.
- Avoid personal words, dates, and keyboard walks (e.g. qwerty) even if they look complex.
- Change passwords after a confirmed breach or if you suspect they were shared.