Strong Password Generator

Weak and reused passwords are behind the majority of hacked accounts, yet inventing a strong one in your head is surprisingly hard; humans pick patterns. Our free strong password generator builds genuinely random passwords using cryptographic randomness, with the length and character mix you choose: lowercase, uppercase, digits and symbols. A live strength meter estimates how hard each password would be to crack. Generation happens entirely in your browser, so the passwords are visible only to you and are never transmitted or stored anywhere.

Quick Answer: Set a length (16 or more is a strong default), tick the character types you want, and generate. Every password uses cryptographic randomness and is created locally, never uploaded.

Free Online Tool

Strong Password Generator

Random passwords generated locally. They are never stored or sent anywhere.








How to Use the Strong Password Generator

  1. Set the password length with the slider; 16 to 20 characters suits most accounts, 24+ for high-value ones.
  2. Choose character sets: lowercase and uppercase letters, numbers and symbols. Keep all four for maximum strength where the site allows them.
  3. Click Generate Password; a fresh password appears with its strength rating.
  4. Generate a few and pick one, or regenerate until you see ‘Excellent’.
  5. Copy the password straight into your password manager or the sign-up form; never reuse it on another site.

Key Features

  • Cryptographic randomness via the Web Crypto API for genuinely unpredictable passwords.
  • Length control from 8 to 64 characters.
  • Toggleable character sets, with ambiguous characters (0/O, 1/l) optionally excluded for passwords you must type.
  • Strength meter based on character pool and length, expressed in estimated bits of entropy.
  • Generated locally: no server ever sees, logs or stores your passwords.

Best Practices and Tips

  • Use a unique password for every account, stored in a reputable password manager; one breach then cannot cascade.
  • Length beats complexity tricks: a 20-character password of letters and digits is stronger than an 8-character one full of symbols.
  • For passwords you must memorise, like a master password, use a passphrase of several random words instead, and a manager for everything else.
  • Change passwords immediately after any breach notice involving a service you use, starting with email and banking.

Common Mistakes to Avoid

  • Reusing the generated password across multiple sites ‘temporarily’ and forgetting; that habit is exactly what credential stuffing attacks exploit.
  • Shortening the password because a form seems fussy, instead of checking its real maximum length.
  • Storing generated passwords in a notes app or spreadsheet rather than a password manager with proper encryption.

Frequently Asked Questions

How long should a password be?

For most accounts, 16 characters or more generated randomly is excellent. Longer is always better: each additional character multiplies the time needed to brute-force the password.

What does the strength meter measure?

It estimates entropy: the size of the character pool raised to the password length, expressed in bits. Above roughly 60 bits is strong for online accounts protected by rate limits; above 100 bits is extremely strong.

Are passwords generated here really private?

Yes. The generator runs entirely in your browser tab using local cryptography. Nothing is sent over the network, and closing the tab erases everything.

Why exclude ambiguous characters?

Characters like 0 and O, or 1, l and I, look alike in many fonts. Excluding them slightly reduces the pool but hugely reduces typing errors when you must enter a password manually, for example on a TV or console.

Should I include symbols?

Include them when the site accepts them; symbols enlarge the character pool and strengthen the password. A minority of sites restrict certain symbols, so if a form rejects your password, regenerate without symbols rather than weakening the length.

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