Secure Password Generator
Generate cryptographically strong, random passwords with full control over length and character sets. Uses the browser's built-in crypto.getRandomValues() API — no patterns, no server logging. Suitable for account passwords, API keys, database credentials, and secret tokens.
Password Options
Advanced Options
Password Security Tips
- Use a unique password for every account
- Aim for 16+ characters — length is the strongest factor
- Mix uppercase, lowercase, numbers, and symbols
- Store in a password manager (Bitwarden, 1Password)
- Enable 2FA on every account that supports it
- Never reuse passwords across multiple accounts
Password Strength Guide
Entropy & Randomness
Password strength is measured in bits of entropy. More entropy = longer to brute-force.
• 8 chars (a-z): ~38 bits — crackable in minutes
• 12 chars (mixed): ~72 bits — years of cracking time
• 16 chars (full set): ~99 bits — functionally uncrackable
• 20+ chars: ~124 bits — astronomically secure
Recommended Length by Use Case
Account Passwords
16+ chars, mixed types. Use a unique password per service.
API Secrets
32+ chars, all character types. Store in env vars, never in code.
Database Creds
24+ chars. Exclude ambiguous characters for config file readability.
Wi-Fi Passwords
20+ chars. Avoid symbols hard to type on mobile keyboards.
Frequently Asked Questions
Related Tools
Understanding Password Security in the Modern Era
Password security remains one of the most critical aspects of digital safety. Despite advances in biometric authentication and passkeys, passwords continue to be the primary line of defence for billions of online accounts. A truly secure password must be long, random, and unique to each service — qualities that are impossible to achieve through human memory alone. This is why cryptographically generated passwords are essential for anyone serious about protecting their digital identity.
How Entropy Determines Password Strength
Password strength is measured in bits of entropy — the mathematical uncertainty an attacker faces when trying to guess your password. Each additional bit of entropy doubles the number of possible combinations. An 8-character lowercase password has roughly 38 bits of entropy and can be cracked in minutes by modern hardware. A 16-character password using the full ASCII character set provides approximately 99 bits of entropy, making brute-force attacks computationally infeasible. Our generator uses the browser's crypto.getRandomValues() API — the same cryptographic randomness source used by security software and operating systems — ensuring every generated password is truly unpredictable.
Best Practices for Password Management
The single most important rule is: never reuse a password across multiple accounts. When a data breach exposes credentials from one service, attackers immediately test those same credentials against hundreds of other services — a technique called credential stuffing. Using a unique, randomly generated password for every account eliminates this risk entirely. Pair strong passwords with a reputable password manager such as Bitwarden or 1Password to store them securely, and enable two-factor authentication (2FA) wherever possible. For API keys, database credentials, and infrastructure secrets, use passwords of 32 characters or more and store them in environment variables — never hardcode secrets in source code. DailyUtil provides a suite of complementary security tools: use the JWT Decoder to inspect authentication tokens, the UUID Generator for unique identifiers, and the Base64 Encoder for encoding credentials in HTTP headers. For encoding URL parameters securely, see the URL Encoder. Explore all available utilities on our homepage, learn more about DailyUtil, or get in touch with our team.