---
title: "Password generator — free, runs in your browser"
description: "Generate strong random passwords in your browser, with the entropy shown. Free, no sign-up, and nothing you enter leaves your browser."
url: https://atoneplace.net/tools/password-generator/
site: "At One Place"
---

# Password generator

Generate strong random passwords in your browser, with the entropy shown.

## How it works

Passwords are generated in your browser using the operating system's cryptographic random number generator. Nothing is transmitted, logged or stored, and the page works with the network disconnected.

The strength figure shown is entropy in bits, calculated as length × log₂(alphabet size). This measures how much work a brute-force search would take against a password generated exactly this way. It is the honest measure for random passwords, and it is meaningless for passwords a human invented — "P@ssw0rd!" scores well on naive strength meters and is among the first things any real attack tries.

For context: 60 bits is adequate for low-value accounts, 80 bits is comfortable for most purposes, and 128 bits is beyond any foreseeable brute-force attack. Length buys entropy far more cheaply than character variety does — adding four characters to a lowercase-only password gains more than adding symbols to a short one.

> This tool runs entirely in your browser. Nothing you enter is sent to a server, logged or stored, and the page keeps working with the network disconnected.

## Common questions

### Are these passwords safe to use?

They are generated locally using your browser's cryptographic random number generator and never leave your device. Whether that is appropriate for a given account is your judgement; a dedicated password manager is better practice for anything important.

### How long should a password be?

Long enough to reach 80 bits of entropy or more, which is about 13 characters from a mixed alphabet or about 17 lowercase letters. Length matters more than symbol variety.

### Is a passphrase better than a password?

Often yes, because a passphrase of several random words reaches high entropy while remaining memorable. The words must be chosen randomly — a phrase you thought of yourself carries far less entropy than it appears to.

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