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Free • CSPRNG • Zero Tracking

Password Generator

Cryptographically secure passwords, passphrases & PINs — powered by Web Crypto API. Nothing leaves your browser, ever.

0 bits
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20
4128
Character Sets
Exclusions

Quick Templates

One-click presets optimized for common use cases

What makes a generated password actually strong?

Password strength comes from unpredictability, not cleverness. A truly strong password is drawn at random from a large character pool and long enough that exhaustive guessing (brute-force attacks) is computationally infeasible. This generator uses the browser's Web Crypto API — the same cryptographically secure random number generator (CSPRNG) used to create TLS encryption keys.

Every password is generated locally using crypto.getRandomValues() with rejection sampling to eliminate modulo bias. The tool guarantees at least one character from every enabled set, then shuffles with a Fisher-Yates algorithm for uniform distribution. The resulting entropy is calculated and displayed so you can assess the password's strength mathematically rather than relying on subjective criteria.

Because everything runs client-side, your passwords exist only in your browser tab until you copy them. No network requests are made, no data is logged, and no cookies track your usage. This makes it safe for generating credentials for banking, corporate accounts, and sensitive infrastructure.

Why use this password generator?

CSPRNG Powered

Uses crypto.getRandomValues() with rejection sampling — true randomness, no modulo bias.

100% Offline

Zero network requests. Works offline. Your passwords never leave your device.

Live Entropy Display

See exact entropy bits and estimated crack time. Judge strength mathematically.

3 Generation Modes

Random passwords, memorable passphrases, and numeric PINs — all in one tool.

Bulk Generation

Create up to 50 unique passwords at once. Copy all or download as a file.

Preset Templates

Banking, Wi-Fi, API keys, master passwords — optimized presets in one click.

Frequently Asked Questions

Is this password generator safe to use online?
Yes. Passwords are created entirely in your browser using the Web Crypto API (crypto.getRandomValues) — the same cryptographically secure random number generator browsers use for TLS encryption. Nothing you generate is transmitted, logged, or stored on any server. The page works offline once loaded.
What is a passphrase and is it more secure than a password?
A passphrase is a sequence of random words (like "vivid-kite-manual-poem-salsa") that creates a long, high-entropy credential that is also easier to type and remember. A 5-word passphrase from a 7,776-word list provides approximately 64 bits of entropy — equivalent to a 10-character fully random password. For most people, passphrases offer the best balance of security and usability.
Why should I exclude look-alike characters?
Characters like 0/O, 1/l/I are visually identical in many fonts. Excluding them prevents confusion when reading passwords aloud, typing from a printout, or sharing over the phone. The entropy reduction is minimal (typically 1-2 bits) but the usability improvement is significant for shared or transcribed credentials.
What is a CSPRNG and why does it matter?
CSPRNG stands for Cryptographically Secure Pseudo-Random Number Generator. Unlike basic Math.random() which uses predictable algorithms, a CSPRNG produces output that is computationally indistinguishable from true randomness. This tool uses the browser's crypto.getRandomValues() — the same source used for generating encryption keys in HTTPS connections.
How do the preset templates work?
Templates are one-click configurations optimized for common scenarios: banking (24 chars, all character types), WiFi passwords (20 chars, no ambiguous characters), API keys (32 chars, alphanumeric), memorable passphrases (4-5 words), and device PINs (6 digits). Each template sets the ideal length, character mix, and exclusions for its use case.
How long should my password be in 2025?
Security researchers and NIST guidelines recommend: • 12 characters minimum for everyday accounts (social media, forums) • 16 characters for important accounts (email, cloud storage) • 20+ characters for high-value targets (banking, password manager master password) • 24+ characters for admin and root credentials Length is the single biggest factor in password strength. A 20-character random password is exponentially harder to crack than a 12-character one, regardless of complexity.
What does the entropy number mean?
Entropy measures how unpredictable your password is, expressed in bits. It is calculated as length × log₂(pool size). Higher entropy means exponentially more guesses are needed: • Under 40 bits: Weak — crackable in minutes to hours • 40–59 bits: Fair — adequate for low-value accounts • 60–79 bits: Strong — suitable for most accounts • 80–99 bits: Very Strong — appropriate for sensitive credentials • 100+ bits: Excellent — beyond brute-force for decades
Can I generate multiple passwords at once?
Yes. Use the Bulk Generate feature to create up to 50 unique passwords simultaneously. Each password is independently generated using the Web Crypto API. You can copy all results at once or download them as a text file. This is ideal for provisioning team accounts, setting up test environments, or rotating multiple credentials.
Should I use the same password for multiple accounts?
Never. Password reuse is the leading cause of account takeovers. When one site is breached, attackers automatically try those credentials on thousands of other services (credential stuffing). Generate a unique password for every account and store them in a password manager like Bitwarden, 1Password, or KeePass.
Is a password with symbols always stronger than one without?
Not necessarily. Strength comes from entropy (length × pool size). A 20-character alphanumeric password (62-char pool = 119 bits) is stronger than a 12-character password with symbols (95-char pool = 79 bits). Symbols help when length is constrained, but adding length is always more effective than adding complexity to a short password.

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