100% Client-Side

Random Password Generator

Free online random password generator. Generate strong, cryptographically secure passwords with custom length, uppercase, lowercase, numbers, and symbols. — runs 100% in your browser, client-side only. No data is sent to any server. Free to use, no account required.

Free Client-Side No Login No Storage
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How to Use the Random Password Generator

  1. Set length and select character sets.
  2. Click Generate for a cryptographically secure password.

Uses crypto.getRandomValues(). Shows password entropy in bits for strength estimation.

What is a Secure Password Generator?

A cryptographically secure password generator uses the browser's Web Crypto API (crypto.getRandomValues) to generate truly random passwords. Unlike Math.random() which is pseudorandom and predictable, Web Crypto produces randomness suitable for security-sensitive applications.

Why Use This Tool

Human-chosen passwords are predictable and reused. A generator creates truly random, high-entropy passwords that resist dictionary attacks, brute force, and credential stuffing from breached databases.

When to Use It

Use a password generator when creating new accounts, generating API keys, setting up service accounts, creating temporary passwords for onboarding, or making passphrases for encrypted archives.

Common Uses

  • Generating strong passwords for new accounts
  • Creating API keys and service account passwords
  • Generating temporary passwords for user onboarding
  • Creating passphrases for encrypted archives or vaults

Frequently Asked Questions

How long should a secure password be?

NIST guidelines recommend at least 12 characters, with 16+ being better. Length matters more than complexity — a 20-character random lowercase string is stronger than an 8-character mixed-case string with symbols.

Is it safe to generate passwords in a browser?

CipherKit uses the Web Crypto API (crypto.getRandomValues) which provides cryptographically strong randomness and runs entirely in your browser. No generated password is ever transmitted or stored.

What characters should a strong password include?

A combination of uppercase letters, lowercase letters, numbers, and symbols maximises the character space. For a 16-character password with 94 possible characters, there are 94¹⁶ ≈ 3.7×10³¹ possible combinations.