What Makes a Strong Password in 2026?

With credential stuffing, rainbow tables, and GPU-accelerated brute force attacks becoming more sophisticated every year, password security is more important than ever. Here's what actually matters.

Length is King

The single most important factor in password strength is length. Each additional character exponentially increases the time needed to brute-force a password.

• 8 characters — Can be cracked in hours with modern GPUs
• 12 characters — Takes months to years
• 16+ characters — Effectively uncrackable by brute force
• 20+ characters — The gold standard for sensitive accounts

Character Diversity

Using a mix of character types increases the "search space" an attacker must cover:

• Lowercase letters (a-z): 26 characters
• Uppercase letters (A-Z): 26 characters
• Numbers (0-9): 10 characters
• Symbols (!@#$%...): ~30 characters

A 16-character password using all four types has a search space of 92^16 ≈ 4.4 × 10^31 combinations. That's 44 nonillion possibilities.

What to Avoid

• Dictionary words— "sunshine", "password123", "iloveyou" are in every attacker's wordlist
• Personal information — Birthdays, pet names, and addresses are trivially discoverable
• Common substitutions— "p@ssw0rd" is just as weak as "password" — attackers know these tricks
• Reusing passwords — If one service is breached, every account sharing that password is compromised

The Best Approach: Generated + Manager

The most secure workflow is:

1. Generate a unique, random password for every account using a password generator
2. Store all passwords in a reputable password manager (1Password, Bitwarden, etc.)
3. Rememberonly your master password — make it a long passphrase like "correct horse battery staple"
4. Enable 2FA on every account that supports it

How Entropy Works

Password strength is measured in bits of entropy. The formula is:

entropy = length × log2(charset_size)

A 20-character password with all character types (92 chars) has about 130 bits of entropy. For reference, 128 bits of entropy is the same security level as AES-128 encryption.

Generate a Strong Password Now

Use our Password Generator to create a cryptographically strong password in one click. It uses the Web Crypto API for true randomness — not Math.random().