Password Generator

“Password123” is not a password — it is a welcome mat. Real security needs length and randomness that no human can invent reliably, which is why a password generator beats your brain every time.

This free password generator creates cryptographically secure passwords (8–64 characters, your choice of character sets) or memorable passphrases made of random words. Every password includes a live strength meter with an entropy rating, one-click copy, and zero network calls — your passwords never leave your browser. Use this password generator for every new account: unique, random passwords mean one leaked database never compromises your other logins. Set your own rules with length sliders, character toggles, and passphrase word counts, then save passwords in a manager — never reuse them. No signup, no watermarks, everything in your browser.

Password Generator

Create strong, random passwords or memorable passphrases — cryptographically secure, generated locally.

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Strength: —

Uses your browser's cryptographically secure random generator (crypto.getRandomValues) — never Math.random. Nothing is sent anywhere; generated passwords exist only on this page.

🔒 100% private — everything runs in your browser, nothing is uploaded.

How to Use the Password Generator

  1. Pick a mode: Password for maximum-strength random strings, or Passphrase for memorable word combinations.
  2. Password mode: drag the length slider (8–64 characters) and toggle character sets — uppercase, lowercase, numbers, symbols. “Exclude ambiguous” removes lookalikes like I, l, 1, O, 0 for passwords you must read or type.
  3. Passphrase mode: choose 3–8 random words and a separator (hyphen, space, dot, underscore, or none).
  4. Watch the strength meter — it rates every generation from Very weak to Very strong with an entropy figure in bits.
  5. Click Copy and paste the result into your account or password manager. Hit Generate for a fresh one any time.

Features That Set This Tool Apart

  • Cryptographically secure randomness — uses crypto.getRandomValues with rejection sampling (no modulo bias), never the predictable Math.random.
  • Two modes in one — brutal random passwords and human-friendly passphrases, switchable with one tap.
  • Live strength meter + entropy — see exactly how strong each result is, in plain labels and bits.
  • Fine-grained controls — length 8–64, four character sets, ambiguous-character exclusion, word count and separators.
  • One-click copy with a clipboard fallback for older browsers.
  • Fully offline — no network calls at all; generated passwords exist only in this page’s memory.
  • Zero tracking — nothing generated is logged, stored, or transmitted.

Password vs. Passphrase: Which to Choose

A 20-character random password like tQ7#mZ!2vLp$9xRn@4wKs carries about 130 bits of entropy — effectively uncrackable — but is impossible to memorize. That makes it perfect for accounts behind a password manager, where you never type it. A 5-word passphrase like coral-drift-harbor-ivory-tide is genuinely typable and memorable, but from a 96-word list it holds only about 33 bits of entropy: fine against casual attacks, not in the same league as the random password.

The rule of thumb: password manager users should use random passwords everywhere and memorize exactly one strong passphrase — the master password protecting the vault, built from 7–8 words (roughly 46–53 bits). If you refuse to use a manager, long passphrases of 7–8 words are your best memorable defense, because they beat any “clever” 10-character password you reuse everywhere. This password generator gives you both modes, so match the tool to the job.

7 Rules for Passwords That Actually Hold

1. Length beats complexity. Each extra character multiplies cracking time by the alphabet size. A 20-character password of mixed sets is effectively uncrackable; an 8-character one is not, symbols or not.

2. Unique per site. Reuse is the number-one way accounts fall — breaches leak passwords, and attackers try them everywhere. A generator makes uniqueness effortless.

3. Use a password manager. Humans cannot remember 100 unique passwords; managers can. Your job reduces to remembering one great passphrase.

4. Turn on two-factor authentication (2FA). Even a perfect password can be phished; 2FA means the stolen password alone is useless.

5. Skip “clever” substitutions. P@ssw0rd! follows patterns crackers know. Randomness has no patterns.

6. Do not change passwords on a schedule. Forced rotation produces weaker passwords (Summer2024! → Autumn2024!). Change them when there is a breach, not a calendar date — this matches current NIST guidance.

7. Never share passwords in chat or email. Use your manager’s sharing feature or a one-time secret link instead.

What the Strength Meter Measures

The meter shows entropy in bits — roughly, how many coin flips an attacker must guess correctly to crack your password. A 20-character password drawn from 90 possible characters has about 130 bits: brute-forcing it is physically infeasible, and the meter rightly calls it Very strong. Each passphrase word from this tool’s 96-word list contributes about 6.6 bits, so 4 words ≈ 26 bits (weak), 6 words ≈ 40 bits (fair), and 8 words ≈ 53 bits (getting serious).

The strength meter in this password generator is calibrated honestly: under 40 bits is guessable with modest resources, 60+ resists offline attacks for years, and 100+ is beyond any brute force that will ever exist. That is why the tool defaults to 20-character passwords — and why passphrase users should slide toward 7–8 words for anything important.

One caveat: entropy measures randomness, not wisdom. A 130-bit password pasted into a phishing site is still compromised. Entropy plus unique-per-site plus 2FA is the complete formula.

Password Generator: Frequently Asked Questions

How does this password generator work?

Choose Password or Passphrase mode, set your options (length, character sets, word count), and click Generate. The tool draws randomness from your browser’s cryptographic generator (crypto.getRandomValues) — the same source operating systems use for keys — and shows a strength rating with entropy in bits for every result. Copy with one click.

Are generated passwords truly random?

Yes. The generator uses crypto.getRandomValues, a cryptographically secure pseudorandom number generator provided by your browser and operating system — never Math.random, which is predictable. Rejection sampling removes modulo bias, so every character and word is chosen with uniform probability. Nothing is sent to any server.

What is a good password length?

Use at least 16 characters for important accounts; 20 is the comfortable default this tool ships with. Each added character multiplies cracking difficulty enormously — a 20-character mixed password is effectively uncrackable by brute force. For passphrases, 6 words is the practical minimum (about 40 bits of entropy); 7–8 words is better for anything important like a master password.

Should I use a passphrase or a random password?

Use random passwords for everything stored in a password manager (you never type them), and memorize one strong passphrase as your master password. If you do not use a manager, passphrases of 6+ words are the best memorable option. Both modes are built into this generator — match the mode to the account.

Is it safe to generate passwords on a website?

On this page, yes: generation happens entirely in your browser with zero network requests, so the password never travels anywhere and cannot be intercepted or logged by us. As a general rule, only trust generators that work offline like this one — never use a password shown to you by a server, in an email, or over chat.

Stop trusting your memory with security. Use this free password generator above, store the result in a manager, and never reuse it — your future self will thank you.