Password Generator

A strong password resists guessing — by humans and by machines. Attackers use brute force (try every combination), dictionary attacks (common words and mutations), and credential stuffing (passwords leaked from one site tried everywhere). Your defense is making the search space so large that guessing your password is impractical. Two levers matter most: length and character variety.

Length usually wins. An 8-character password using all character types has about 95⁸ ≈ 6.6 quadrillion possibilities. A 16-character password from the same alphabet has 95¹⁶ ≈ 4.4 × 10³¹ — astronomically harder. A 20-character password using only lowercase letters still carries roughly 94 bits of entropy, often beating a short password that looks complex like P@ssw0rd1! because predictable patterns shrink the effective search space.

Entropy in plain language

Entropy measures randomness in bits. Each extra bit doubles the number of guesses required. Our strength meter estimates entropy as log₂(pool size) × length — how many characters you can pick from, raised to the power of password length. Sixty bits is a practical “strong” threshold for everyday accounts; 128 bits is “very strong” and comparable to serious cryptographic keys.

Common password mistakes

• Using dictionary words or names — cracked in seconds with wordlists
• Predictable substitutions — Password1! and Welcome2026! appear in attack databases
• Reusing one password across sites — one breach compromises every account
• Personal information — birthdays, pets, addresses are easy to research

Best practices

• Use a password manager (Bitwarden, 1Password, etc.) — unique random passwords per site
• Enable two-factor authentication (2FA) wherever offered
• For memorable secrets, use a passphrase: four to six unrelated random words beats an 8-character “complex” password
• Use our ambiguous character option only when you must type passwords by hand

Why this generator is safe

SuperTextTools runs entirely in your browser. Passwords come from crypto.getRandomValues() — never predictable Math.random(). Nothing is uploaded, logged, or stored. The privacy banner at the top states this explicitly because trust matters for security tools.