Is the password actually random?

Yes — it comes from Web Crypto's getRandomValues, the same CSPRNG used by browsers for TLS. Math.random is never used here.

Does the site see or log the password?

No. Generation happens in your tab. You can disconnect from the internet and it still works.

How long should a password be?

16 is fine for low-stakes sites, 20 for anything you'd hate to have breached, 24+ for a password-manager master password and financial / identity accounts.

Is this password generator safe to use for important accounts?

Yes. The tool uses Web Crypto's crypto.getRandomValues() — the same CSPRNG (cryptographically secure pseudo-random number generator) browsers use for TLS handshakes and encryption. It never uses Math.random() (which is seeded from system time and predictable). Generation runs entirely in your tab; nothing crosses the network. You can disconnect from the internet and confirm via DevTools Network tab. Best practice: generate the password here, paste directly into your password manager, never type it manually or save to a text file. After saving, regenerate to clear the local copy. Even safer: use your password manager's built-in generator (Bitwarden, 1Password, etc.) which combines generation with secure storage in a single step — no copy/paste, no clipboard exposure.

How do I create a strong password manually?

Don't — humans are bad at randomness, and 'random-looking' passwords like 'P@ssw0rd123!' are weak (~25 bits entropy). Better options: (1) Use a password manager's generator — outputs CSPRNG-quality random characters. (2) Use diceware: roll 5 dice five times, look up each 5-digit number on the diceware word list (eff.org/dice has the EFF version), assemble the 5 words. Result: ~64 bits entropy, memorable. Add 1-2 more words for 80+ bits. (3) For typing-into-server-console scenarios where you can't use a manager: passphrase of 6+ random English words (correct-horse-battery-staple style) gives ~77 bits. Avoid: substituting numbers/symbols for letters in dictionary words ('p4ssw0rd!' is still trivially crackable), using personal info, reusing passwords across sites, and any pattern your brain finds 'memorable' (it's predictable to attackers too).

What's the best length for a password in 2026?

Recommended minimums: 12 chars for low-stakes accounts (forums, news sites), 16 for ordinary accounts (email, retail), 20 for high-stakes (banks, brokerages, password manager master), 24+ for critical secrets (server SSH keys, root credentials). Why? Entropy formula: log2(pool_size) × length. With a 94-character pool (a-z, A-Z, 0-9, symbols), 12 chars = 79 bits, 16 chars = 105 bits, 20 chars = 131 bits. Modern attackers can attempt ~10¹⁰ to ~10¹⁴ guesses/second on consumer GPUs against unsalted hashes; 80+ bits is uncrackable for individual targets, 100+ bits is uncrackable even with budget for nation-state attackers. The bigger risk than length isn't brute force — it's reuse and phishing. Use unique passwords per site (manager makes this trivial) and enable 2FA wherever offered (TOTP via Authy / Google Authenticator beats SMS).

Developer Utilities · Free tool

Password Generator

Generate strong random passwords. Choose length, symbols, numbers, and avoid lookalikes. Runs locally.

Updated June 2026

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What it does

A free password generator that runs entirely in your browser — the password never leaves your device. Choose length (8–64), toggle character classes (lowercase, uppercase, digits, symbols), optionally exclude look-alike characters (I, l, 1, O, 0, o), and get a fresh strong password. A built-in strength meter estimates entropy based on the character pool and length.

Longer is better: a 20-character password with mixed classes has more entropy than a complicated 10-character one. For anything you actually care about — email, banking, password manager master password — aim for 16+ characters with all classes enabled. Paired with a password manager, you only need to remember one strong password ever.

Embed this tool on your siteShow snippet

Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.

<iframe src="https://freetoolarena.com/embed/password-generator" width="100%" height="720" frameborder="0" loading="lazy" title="Password Generator" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>

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Example input & output

Input

Length: 20
Classes: a-z, A-Z, 0-9, symbols
Exclude look-alikes: on

Output

v#Kq7n$Mh3RyfXjwTb2P

At length 20 with all four classes, entropy is ~131 bits — comfortably strong for anything short of a nation-state adversary.

How to use it

Slide Length to your target (20 is a solid default).
Toggle character classes — keep all four on unless a site blocks symbols.
Click Regenerate until you get one you like.
Click Copy and paste into your password manager or the signup form.

How it works

Key takeaways

80+ bits of entropy is uncrackable today; 20 random characters from a 94-symbol pool gives ~131 bits — well beyond brute-force range.
“Correct horse battery staple” is only 44 bits and is now crackable. Modern passphrases need 6-7 random words from a long list (diceware) for safety.
Password reuse is a bigger risk than length. One breach compromises every reused account — use a manager with unique 20+ char passwords per site.
Use Web Crypto’s getRandomValues(), never Math.random(). The latter is predictable and entirely unsafe for anything security-relevant.

Reads cryptographically secure random bytes from your browser’s crypto.getRandomValues() Web Crypto API and maps each byte to a character from the enabled pool. No Math.random() — that’s predictable and not safe for passwords. Entropy is calculated as log2(pool_size) × length.

Advanced: passphrases vs passwords + storage

For passwords you must remember, switch to a diceware passphrase (5-7 random words from a 7,776-word list = 65-91 bits entropy). “correct horse battery staple” (XKCD-famous) is 44 bits and crackable today; modern recommendation is 6-7 words. For passwords stored in a manager, this generator (20+ chars, all classes) gives 130+ bits — well beyond cracking range. The password breach checker verifies (via k-anonymity, no transmission of full password) whether a candidate has appeared in known data breaches.

How this compares to alternatives

vs Bitwarden / 1Password generators: identical math; password managers integrate generation with storage. vs openssl rand: same CSPRNG quality, different interface. vs random-words sites: our tool uses Web Crypto; many random sites use Math.random which is predictable. Verify any password generator by checking whether output is reproducible from a seed (good generators are not).

Common mistakes when using this tool

Reusing one strong password across sites. One breach compromises everything. Use a password manager — generate unique 20+ char password per site.
Excluding symbols because of typing friction. Modern phones handle them fine. Excluding symbols cuts pool from ~94 to ~62 characters; need 27 chars instead of 20 for equivalent entropy.
Memorizing the generated password. Use a passphrase (6+ random words) for things you must memorize; generated random for things you store.
Skipping 2FA after setting strong password. Even a 130-bit password is vulnerable to phishing and credential-stuffing. Always enable 2FA where offered (TOTP via Authy / Google Authenticator beats SMS).

Learn more about password security

Password entropy explained — the bits-of-entropy formula, what 80 bits actually means, and why character class diversity matters less than length.
Passphrase vs password — when to memorize a 6-word diceware phrase vs generate a 20-char random string, and why “correct horse battery staple” is no longer enough.
Password managers compared — Bitwarden vs 1Password vs browser-built-in, threat model, and why reusing passwords is the bigger risk.
TLS glossary — how passwords are protected in transit and why HTTPS matters for login forms.

When to use this tool

You need a password and you don't want to use one you'll remember.
You use a password manager and need the thing it stores.
You're setting up infrastructure (DB, SSH key passphrase, etc.).

When not to use it

You need to memorize the password. Use a diceware passphrase (6+ words) instead — still strong, far easier to remember.
You're generating a PIN. Strong passwords aren't the same as strong PINs; a PIN tool is more appropriate.

Common use cases

Creating a new account on any site that doesn't auto-generate for you.
Rotating a password after a breach (check haveibeenpwned.com).
Generating Wi-Fi, database, or API passwords.
Seeding a password manager's vault with strong unique passwords.

Frequently asked questions

Is the password actually random?: Yes — it comes from Web Crypto's getRandomValues, the same CSPRNG used by browsers for TLS. Math.random is never used here.
Does the site see or log the password?: No. Generation happens in your tab. You can disconnect from the internet and it still works.
How long should a password be?: 16 is fine for low-stakes sites, 20 for anything you'd hate to have breached, 24+ for a password-manager master password and financial / identity accounts.
Is this password generator safe to use for important accounts?: Yes. The tool uses Web Crypto's crypto.getRandomValues() — the same CSPRNG (cryptographically secure pseudo-random number generator) browsers use for TLS handshakes and encryption. It never uses Math.random() (which is seeded from system time and predictable). Generation runs entirely in your tab; nothing crosses the network. You can disconnect from the internet and confirm via DevTools Network tab. Best practice: generate the password here, paste directly into your password manager, never type it manually or save to a text file. After saving, regenerate to clear the local copy. Even safer: use your password manager's built-in generator (Bitwarden, 1Password, etc.) which combines generation with secure storage in a single step — no copy/paste, no clipboard exposure.
How do I create a strong password manually?: Don't — humans are bad at randomness, and 'random-looking' passwords like 'P@ssw0rd123!' are weak (~25 bits entropy). Better options: (1) Use a password manager's generator — outputs CSPRNG-quality random characters. (2) Use diceware: roll 5 dice five times, look up each 5-digit number on the diceware word list (eff.org/dice has the EFF version), assemble the 5 words. Result: ~64 bits entropy, memorable. Add 1-2 more words for 80+ bits. (3) For typing-into-server-console scenarios where you can't use a manager: passphrase of 6+ random English words (correct-horse-battery-staple style) gives ~77 bits. Avoid: substituting numbers/symbols for letters in dictionary words ('p4ssw0rd!' is still trivially crackable), using personal info, reusing passwords across sites, and any pattern your brain finds 'memorable' (it's predictable to attackers too).
What's the best length for a password in 2026?: Recommended minimums: 12 chars for low-stakes accounts (forums, news sites), 16 for ordinary accounts (email, retail), 20 for high-stakes (banks, brokerages, password manager master), 24+ for critical secrets (server SSH keys, root credentials). Why? Entropy formula: log2(pool_size) × length. With a 94-character pool (a-z, A-Z, 0-9, symbols), 12 chars = 79 bits, 16 chars = 105 bits, 20 chars = 131 bits. Modern attackers can attempt ~10¹⁰ to ~10¹⁴ guesses/second on consumer GPUs against unsalted hashes; 80+ bits is uncrackable for individual targets, 100+ bits is uncrackable even with budget for nation-state attackers. The bigger risk than length isn't brute force — it's reuse and phishing. Use unique passwords per site (manager makes this trivial) and enable 2FA wherever offered (TOTP via Authy / Google Authenticator beats SMS).

See how this compares

Head-to-head1Password vs Bitwarden1Password vs Bitwarden in 2026: pricing, family plans, business features, security model, polish. Pick by budget and feature needs.

Learn more

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