Features

More than just random characters.

Most password generators stop at a length slider and a copy button. PassGen gives you the tools professionals actually need.

Entropy scoring

See exact bit-entropy and four crack-time scenarios — online throttled, online fast, offline fast hash, and bcrypt. Not just "Strong" or "Weak."

94.7 bits · billions of years offline

Custom word embedding

Embed a meaningful word — a name, year, or team code — hidden inside a cryptographically random password. Only you know it's there.

e.g. "Luna" → X9kLunaw!P3m#

Preset profiles

One-click presets for real-world use cases: WiFi passwords, API keys, master passwords, PINs, and memorable passphrases.

WiFi · Master · API Key · PIN · Memorable

Cryptographic randomness

Every password uses the Web Crypto API (crypto.getRandomValues()), not Math.random(). Unpredictable by design.

CSPRNG · runs entirely in browser

Bulk generation

Generate five passwords at once with the same settings and pick the one that feels right. One-click copy on any of them.

5 alternatives · instant copy

Fine-grained control

Exclude visually similar characters, exclude ambiguous symbols, set minimum requirements per type, choose word separators — controls for every edge case.

min uppercase / numbers / symbols

Privacy first

Your passwords never leave your device.

PassGen runs entirely in your browser. No server calls, no telemetry, no account sign-up. The only code that runs is the code you can inspect in DevTools.

Try the generator

How it works

Strong passwords in three steps.

Pick a mode.

Choose between a fully random password, a human-readable passphrase, or a numeric PIN — whichever suits the site.

Tune the settings.

Set length, toggle character types, use a preset, or dial in minimum requirements. The preview updates live as you adjust.

Copy and use it.

Copy with one click. Press Space to regenerate without touching your mouse.

FAQ

Common questions.

The best password generator is one that uses cryptographic randomness, runs entirely in your browser with no server involvement, and gives you real security metrics — not just a color badge. PasswordGeneratorX uses the Web Crypto API (crypto.getRandomValues()), shows exact entropy in bits, and provides crack-time estimates across four real-world attack scenarios. It is free, requires no account, and works offline.

A password generator is a tool that automatically creates a random, secure password for you. Instead of thinking up a password yourself — which tends to produce predictable patterns — a password generator uses an algorithm (ideally a cryptographically secure one) to pick characters at random from a defined set. The result is a password that is practically impossible to guess, brute-force, or find in a dictionary attack.

A strong password has four properties: length (16+ characters), randomness (no dictionary words or keyboard patterns), character diversity (uppercase, lowercase, numbers, and symbols), and uniqueness (never reused across sites). The easiest way to guarantee all four is to use a strong password generator like this one. Set the length to at least 16, enable all character types, and copy the result directly into your password manager.

You can, but with caution. A password that simply contains your name — like "John@2024" — is weak because attackers run targeted wordlists that include names, birth years, and common substitutions. However, PasswordGeneratorX's "embed custom word" feature lets you hide your name inside a cryptographically random password — e.g., "k#7Johnm!Xp2" — so the surrounding characters are still fully random and the overall entropy remains high.

Strong password examples include: a 16-character random string like "Xk9#mP2!wL5@nQ8v", a 20-character alphanumeric key like "R7tN2mK8pJ4vQ9xL3wB6", or a 4-word passphrase like "Coral-Timber-Wave-49". All three score above 80 bits of entropy. Avoid examples you have seen published — including these — since any publicly listed password should be considered compromised. Always generate a fresh one.

Yes. PassGen uses the Web Crypto API (crypto.getRandomValues()) — a cryptographically secure pseudo-random number generator (CSPRNG) built into every modern browser. This is the same primitive used by browsers for TLS and encryption. It is not predictable like Math.random().

Never. The entire generator runs in your browser as client-side JavaScript. No network request is made during or after generation. You can even turn off your internet connection and the generator keeps working.

For most accounts, 16+ characters is a solid baseline (~94 bits of entropy with all character types). For high-value accounts — email, banking, password manager master password — use 24–32 characters or a 5-word passphrase. The entropy meter in the tool shows you exactly how strong your chosen length is.

A passphrase is a sequence of random dictionary words (e.g. "correct-horse-battery-staple"). Four random words from a 400-word list gives ~34 bits of entropy per word — a 4-word passphrase reaches ~136 bits, which is stronger than most random passwords under 20 characters. Passphrases are easier to type and remember while remaining cryptographically strong.

Entropy measures the information content — and therefore the unpredictability — of your password in bits. A password with 60 bits of entropy requires on average 2^59 guesses to crack by brute force. Each additional character roughly adds log₂(charset_size) bits: ~6.6 bits per character for a 94-character charset. PassGen calculates and displays this number live.

No. Even a perfect password becomes worthless if the site storing it is breached and the leaked hash is cracked. Use a unique password for every account. A password manager (Bitwarden, 1Password, KeePassXC) stores them so you only remember one master passphrase.

The Best Free Password Generator — Strong, Random & Secure

A password generator is the fastest way to protect your online accounts. Instead of reusing the same weak passwords across dozens of sites, a good online password generator creates a unique, cryptographically random string every time — one that no attacker can guess, no dictionary can crack, and no pattern can predict. PasswordGeneratorX is a free, browser-based tool that does exactly that, with no sign-up, no server, and no data ever leaving your device.

Why You Need a Strong Password Generator

Cybercriminals use automated tools that can test billions of password combinations per second against leaked credential databases. A simple 8-character word like sunshine falls in under a second. Even password generator 8 characters output built from random uppercase, lowercase, numbers, and symbols can withstand trillions of guesses. Scale up to a password generator 12 characters output and you're into territory that would take a modern GPU cluster millions of years to exhaust. At 15 characters — recommended for anything critical — a password generator 15 characters result delivers entropy well above 90 bits, making brute-force attacks practically impossible.

How Our Random Password Generator Works

Our random password generator uses the browser's built-in crypto.getRandomValues() API — the same cryptographic randomness used by banks and security software — not the predictable Math.random() function. Every character is selected independently, so there is no detectable pattern, no bias, and no way to predict the output even if an attacker knows the algorithm. The password is generated entirely inside your browser. Nothing is transmitted to any server.

Modes: Random, Passphrase & PIN

The secure password generator on this page offers three distinct modes to match your exact use case:

  • Random mode — full control over length (4–128 characters), character sets (uppercase, lowercase, numbers, symbols), exclusion filters, and a custom-word embedding feature that hides a meaningful word inside a random password.
  • Passphrase mode — generates memorable multi-word phrases like Coral-Timber-Wave-49 that are both strong and easy to type. Ideal for master passwords and disk encryption keys.
  • PIN mode — creates numeric codes from 4 to 12 digits for devices, ATMs, and apps that only accept numbers.

Entropy Scoring & Crack-Time Analysis

Unlike most password generator free tools that show a vague "weak / medium / strong" badge, PasswordGeneratorX displays the exact entropy in bits and four real-world crack-time estimates: online throttled (10 guesses/sec), online fast (1,000/sec), offline fast hash (10 billion/sec), and bcrypt/slow hash (10,000/sec). This lets you make an informed decision about whether a password is actually strong enough for your threat model — not just strong enough to pass a form validator.

Best Free Password Generator — Privacy First

The best free password generator is one you can trust completely. PasswordGeneratorX is fully open about how it works: all logic runs in your browser as plain JavaScript, there is no backend API, no analytics that capture your passwords, and no account required. You can even save the page for offline use. The tool works identically on desktop and mobile, so you can generate a strong password from any device at any time.

How to Use the Password Generator

  1. Choose a mode: Random, Passphrase, or PIN.
  2. Set your desired length — at least 12 characters for most accounts, 16+ for email and banking.
  3. Select character types (uppercase, lowercase, numbers, symbols).
  4. Apply any filters — exclude visually similar characters like 0 and O to avoid typos.
  5. Click Copy and paste directly into your password manager.

You can also press Space to regenerate instantly without reaching for your mouse. The security score, entropy, and crack-time panel update in real time as you adjust settings.

Frequently Recommended Settings

Not sure where to start? Use one of the built-in presets:

  • Strong (20 chars) — all character types, great for social media and shopping accounts.
  • Master password (32 chars) — maximum strength for your password manager vault.
  • API key (48 chars) — alphanumeric only, no symbols, ideal for developer tokens.
  • Wi-Fi password (20 chars) — excludes similar-looking characters so guests can type it easily.
  • Memorable passphrase — four capitalized words with a number, easy to remember and type.

Stop reusing weak passwords. Generate a unique, strong, random password for every account right now — it takes less than five seconds and costs nothing.