Gerador de senhas

Esta calculadora fornece cálculos instantâneos e precisos nesta área. Insira seus dados e obtenha resultados imediatamente com explicação clara. Esta ferramenta gratuita funciona completamente no seu navegador — sem transferência de dados, sem cadastro necessário.

Cálculos precisos nesta área requerem compreensão das fórmulas e padrões subjacentes. Nossa calculadora aplica os métodos mais amplamente aceitos recomendados por instituições internacionais e consenso científico. Os resultados são úteis para finanças pessoais, monitoramento de saúde, projetos técnicos ou objetivos educacionais. A ferramenta processa seus dados localmente para manter a privacidade. Gratuito, sem cadastro.

What makes a password truly strong?

The NIST Special Publication 800-63B (2017) fundamentally changed how security professionals think about password strength. The old paradigm — mandatory complexity rules like "must include uppercase, number and symbol" — turns out to be counterproductive because it leads to predictable patterns (Password1!, Summer2024!). NIST's updated guidance: length matters more than complexity. A 20-character passphrase of random words ("coffee-mountain-river-lamp-27") is far stronger than an 8-character "complex" password and vastly easier to remember. Our generator uses a cryptographically secure random number generator (CSPRNG) — not JavaScript's regular Math.random() which is not cryptographically secure — to generate genuinely unpredictable passwords.

Why you need a different password for every site

Data breaches expose billions of credentials annually. When a site is breached, attackers immediately use the stolen username/password pairs to attempt logins on every major service — a technique called credential stuffing. If you reuse passwords, a breach at one minor site can unlock your email, banking and social accounts. Use a password manager (Bitwarden, 1Password, KeePass) to generate and store unique passwords for every service. After generating your password here, check its strength with our Password Strength Checker.