Strong Password Generator: How to Create Secure Passwords (2026)

Most advice about passwords is a decade out of date: mix in a symbol, swap an "o" for a zero, change it every 90 days. Modern guidance from bodies such as NIST has moved in a different direction — favour length, favour randomness, stop forcing arbitrary rotation, and screen against known-breached passwords. This guide explains what actually makes a password hard to guess, and how to produce one with our Password Generator.

What makes a password strong

Randomness comes first

A password is only as strong as the process that produced it. A human-chosen password follows human patterns — a word, a capital at the front, a number and an exclamation mark at the end — and cracking tools model those patterns directly. A password drawn character by character from a random source has no pattern to model, which is the whole point of using a generator rather than your imagination.

Length beats complexity

Adding one character to a random password multiplies the number of possibilities by the size of the alphabet. Adding one more symbol type to a short password only widens the alphabet slightly. Given a choice between a 10-character password with every character class and a 20-character lowercase-and-digit password, the longer one is dramatically harder to brute force.

Entropy, in plain terms

Entropy is a measure, in bits, of how many equally likely possibilities a random password was drawn from. Each extra bit doubles the search space. For a password of L characters chosen uniformly from an alphabet of N symbols, the entropy is L × log₂(N).

The practical takeaway: anything above roughly 80 bits of true entropy is beyond offline brute force with any foreseeable hardware, and the generator's default of 20 characters across all four sets comfortably exceeds that. Beyond that point the weak link is never the password's maths — it is reuse, phishing, and where the password is stored.

Never reuse a password

This is the single most important rule, and it is why generated passwords need a manager rather than a memory. When any site is breached, the leaked credentials are replayed against other services automatically — an attack known as credential stuffing. A unique password per account turns one site's bad day into one account's problem. A reused password turns it into all of them.

The rest of the checklist

• Use a password manager so every account can have a different long random string you never need to type from memory.
• Turn on two-factor authentication wherever it is offered; an app-based or hardware key factor is stronger than SMS.
• Change a password when there is a reason to — a breach notice, a shared device, a suspicion — rather than on a fixed schedule.
• Keep a handful of memorable passphrases only for the secrets that unlock everything else, such as your password manager and your device login.
• Never send a password over email or chat; share credentials through your manager's sharing feature instead.

How to use the EasyFileMagic Password Generator

The generator uses crypto.getRandomValues, the browser's cryptographically secure random number generator — not Math.random. Everything happens on your device: the password is never transmitted, logged or saved, and reloading the page discards it.

1. Open the Password Generator. A password appears immediately, at the default length of 20 characters with all four character sets enabled.
2. Drag the length slider to anything from 4 to 64 characters. Longer is stronger; match the site's maximum if it enforces one.
3. Tick the character sets you want: lowercase, uppercase, digits and symbols. The generator guarantees at least one character from every set you enable, then fills the rest from the combined pool and shuffles the result.
4. Enable exclude ambiguous characters if the password will be read aloud or typed by hand — it removes the easily confused I, l, 1, O, 0 and o at a small cost in entropy.
5. Watch the strength meter update as you change options. It scores length and the variety of character classes present.
6. Press New for a different password, or Copy to put it on your clipboard — then paste it straight into your password manager before you navigate away.

After you generate

Save the password into a manager immediately; the tool deliberately keeps no history. If you need a one-way fingerprint of a string rather than a secret to store, our Hash Text tool computes SHA hashes locally, and UUID Generator is the right tool for random identifiers that are not secrets.

Why an in-browser generator matters here

A password generated on someone else's server is a password that existed, however briefly, on someone else's machine. There is rarely any reason to accept that risk: generating random characters needs no server-side capability at all. Our generator runs in the page, works offline once loaded, requires no account, and produces nothing that is stored anywhere — which is exactly the standard you should hold any password tool to.