Password Generator
Create strong, random passwords with a cryptographically secure generator that runs entirely in your browser.
Reviewed by the WorldCalcs team · Methodology · Last reviewed: June 2026
Password
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Characters
Your password is generated locally in your browser. We never see, store, or send it.
What is a password generator?
A password generator creates a random string of characters to use as a password. Random passwords are far harder to guess or crack than words, names, or dates, because they follow no pattern an attacker can predict. The longer the password and the wider the mix of characters, the stronger it is.
How it works
You choose a length and which character types to include — uppercase letters, lowercase letters, numbers, and symbols. The generator builds a pool from those sets and picks each character at random using your browser's cryptographically secure random number generator. Strength is measured in bits of entropy, roughly length × log₂(pool size): a longer password drawn from a bigger pool has more possible combinations and takes far longer to break.
Example
A 16-character password using uppercase, lowercase, numbers, and symbols draws from about 94 possible characters. That is roughly 16 × log₂(94) ≈ 105 bits of entropy — about 94¹⁶ possible combinations, which is far beyond what brute force can search. Dropping to an 8-character lowercase-only password gives only about 38 bits, which is weak.
All calculations happen in your browser. Nothing is sent, stored, or tracked.
Results are estimates and may contain errors — for general information only, not professional advice. Always verify before relying on them. Disclaimer
How to use
Pick a length, choose which character types to include, and optionally exclude visually similar characters. A new password is generated automatically — click Generate for another, or Copy to put it on your clipboard.
For most accounts, aim for 16+ characters with all four character types. Use a unique password per site and store them in a password manager.