Password Generator

Generate strong, secure passwords, memorable passphrases, and PINs, then check password strength. Shows true entropy in bits and estimated crack time — free, local only, nothing stored.

A password generator and strength checker in one. Create cryptographically random passwords up to 64 characters, memorable passphrases (word-based), or numeric PINs — then see the exact entropy in bits and how long a modern attacker would take to crack it. Everything runs in your browser using the Web Crypto API, so no password is ever sent, logged, or stored.

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Category
Calculators & Converters
Includes
8 features
Access
Free · No sign-up
Privacy
Runs in your browser
Password Generator

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How to use

How to use Password Generator

  1. 01

    Pick a mode

    Choose Password for random character strings, Passphrase for memorable word chains (easier to type and remember), or PIN for numeric codes.

  2. 02

    Set length and character sets

    Drag the length slider and toggle uppercase, lowercase, numbers, and symbols. Enable 'No look-alikes' to drop easily confused characters like O/0 and l/1.

  3. 03

    Generate and read the strength telemetry

    Click Generate. The panel shows entropy in bits, a strength label, and an estimated crack time assuming a fast modern GPU attacker.

  4. 04

    Copy and store it safely

    Use the copy button, then paste the password into your password manager. Use a unique password for every account so one breach can't compromise others.

Use cases

Common use cases

  • Creating a unique, strong password for a new online account
  • Generating memorable passphrases for logins you type by hand
  • Producing numeric PINs for devices, cards, or app locks
  • Auditing an existing password's strength before reusing it
  • Making Wi-Fi or router admin passwords that resist brute force
  • Generating credentials for shared team or service accounts
Overview

Generate strong passwords and test their strength

Create random, high-entropy passwords with control over length and character sets, then check any password's strength against length, variety, and common-pattern weaknesses. It's two essential security tasks — creation and evaluation — in one place.

Privacy-first by design

Passwords are generated and analyzed entirely in your browser and are never transmitted or stored, so nothing you type is logged. Pair a unique generated password with a password manager for each account to shut down credential-stuffing and reuse attacks.

Features
01
Three modes: random password, memorable passphrase, and numeric PIN
02
Cryptographically secure RNG (Web Crypto), not Math.random
03
True entropy shown in bits + real crack-time estimate
04
Exclude look-alike characters (O/0, l/1, I) for error-free typing
05
Guarantees at least one of each selected character set
06
Adjustable length up to 64 chars and passphrase word count
07
Live strength analyzer, mask/reveal, one-click copy
08
Session history of recent passwords (never leaves your device)
FAQ

Frequently asked questions

How do I create a strong password?+

A strong password should be: at least 12 characters long, include uppercase and lowercase letters, numbers, and symbols, and not contain dictionary words or personal info. This generator creates cryptographically random passwords following all these rules.

What makes a password secure?+

Password security comes from entropy (randomness). A 16-character password using letters, numbers, and symbols has over 95^16 possible combinations — taking billions of years to crack by brute force with current computers.

How long should my password be?+

Minimum 12 characters for personal accounts, 16+ for financial and work accounts. Longer is always better. A 12-character complex password takes centuries to crack; a 6-character password can be cracked in minutes.

Does this password generator store my passwords?+

No. All password generation runs locally in your browser's memory. The generated passwords are never sent to any server, logged, or stored anywhere. When you close the page, the passwords are gone.

Is using a password manager better than remembering passwords?+

Yes. Password managers let you use a unique, strong password for every site without memorizing them. This is far safer than reusing the same password — if one site is breached, your other accounts stay safe.

How do I check if my current password is strong?+

Type your password into the output field. It calculates the entropy in bits from length and character variety, then shows a strength label (Vulnerable / Standard / High-Grade / Fortified) and an estimated time to crack by brute force.

What is a passphrase and is it more secure?+

A passphrase strings together random words (like 'Cable-River-Oak-Mint-42'). It's easier to remember and type than a random string, and a 5–6 word passphrase can exceed 70 bits of entropy — stronger than most manually-created passwords, while staying human-friendly.

What does entropy in bits mean?+

Entropy measures unpredictability. Each bit doubles the number of guesses an attacker must make. 40 bits is weak, 60–70 bits is good, and 80+ bits is effectively uncrackable with today's hardware. This tool shows the exact bit count for whatever you generate or type.

Should I exclude look-alike characters?+

Enable 'No look-alikes' when a password will be typed or read aloud — it removes easily confused characters (O vs 0, l vs 1, I). It slightly lowers entropy per character, so bump the length up a little to compensate. For manager-stored passwords you can leave it off.

Does this store my passwords?+

No. Generation and strength checking happen entirely in your browser; nothing is saved or transmitted.

How long should a password be?+

Aim for at least 12–16 characters. Length adds more security than complexity, so longer passphrases are both stronger and easier to remember.