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Password Generator

100% Free

Generate strong, secure and random passwords instantly. Keep your accounts safe with our advanced password generator.

Cryptographic
Never Stored
Instant
Strength Score

Password Length

Your Generated Password

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Add Password Generator to your website or blog in seconds.

  • Responsive design
  • Lightweight & fast
  • No backend required
  • Always up-to-date 
<iframe
  src="https://tools.town/embed/password-generator/"
  width="100%"
  height="600"
  style="border:none; border-radius:12px;"
  loading="lazy"
  title="Password Generator">
</iframe>

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How to Use

  1. 1 Set your preferred password length using the slider (16+ is recommended)
  2. 2 Toggle the character sets you want — uppercase, lowercase, numbers, symbols
  3. 3 Optionally exclude ambiguous characters (I, l, 1, O, 0) for easier transcription
  4. 4 Click Generate Password — the strength meter shows entropy in bits
  5. 5 Copy with one click and use it to secure your account

Features

  • Generate cryptographically random passwords via Web Crypto API
  • Customize length from 4 to 128 characters
  • Include uppercase, lowercase, numbers and symbols
  • Exclude similar characters to avoid transcription confusion
  • Real-time strength meter with entropy calculation
  • 100% client-side — nothing is ever sent to a server

Why it Matters

Strong passwords are your first defence against brute-force attacks and credential stuffing. A unique, high-entropy password for every account dramatically reduces your attack surface — even if one site is breached.

★★★★★

Use Cases

Personal Accounts

Secure your email, social media and personal accounts

Online Banking

Protect your banking and financial accounts

Work & Business

Keep work accounts and company data safe

Developer Keys

Secure API keys, databases and developer tools

How to use

  1. Pick a length — 16+ characters is the modern minimum.
  2. Toggle the character sets you want (upper, lower, numbers, symbols).
  3. Optionally exclude ambiguous characters (I, l, 1, O, 0) for easier transcription.
  4. Click Generate — the strength meter shows entropy in bits.
  5. Copy with one click.

How strength is measured

We use Shannon entropy: bits = log₂(charset) × length. The threshold guidelines:

BitsStrengthMeaning
< 40WeakTrivially crackable; use only for low-stakes throwaways.
40–60FairOK for low-value accounts, not for anything you care about.
60–80StrongResistant to most attacks short of state-actor budgets.
80+ExcellentPractically uncrackable.

Privacy

The password is generated using crypto.getRandomValues — the same cryptographic randomness your operating system provides. Nothing is transmitted, logged, or saved. Reload the page and the password is gone.

Frequently Asked Questions

Are the passwords stored anywhere?
No. Generation happens entirely in your browser using Web Crypto. Nothing is sent to a server, logged, or stored.
What makes a password strong?
Length and unpredictability. Aim for at least 16 characters drawn from a mix of upper, lower, numbers, and symbols. The strength meter shows the entropy — anything above 80 bits is excellent.
How is entropy calculated?
Entropy = log₂(charset size) × length. A 20-character password from an 88-symbol charset has ~129 bits of entropy.
Why exclude ambiguous characters?
I, l, 1, O, and 0 look similar in many fonts. Excluding them helps when you have to read or type a password from a screen.
Should I use this for password manager fill?
Yes, but it's also fine to let your password manager generate them — the math is the same. This tool is for one-off needs and quick comparison.
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Want to learn how this works?

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