Generador de Contraseñas

Genera una contraseña criptográficamente aleatoria. Elige la longitud y qué clases de caracteres incluir. Todo se ejecuta en tu navegador — nada se sube, sin inicio de sesión, sin rastreo.

Haz clic en el campo y luego Ctrl/⌘+C para copiar, o usa el botón Copiar.

Fuerza — bits
Opciones
Clases de caracteres
Extras

Las contraseñas se generan en tu navegador con crypto.getRandomValues y muestreo por rechazo, así cada carácter se elige de forma uniforme del conjunto seleccionado. La barra de fuerza muestra la estimación de entropía en bits; es un cálculo, no una garantía.

About this tool

Password Generator creates high-entropy passwords using the browser's CSPRNG. You choose the length (8 to 128 characters) and which character classes to include: lowercase, uppercase, digits, and a curated set of symbols. The generator avoids ambiguous pairs (l and 1, O and 0, etc.) when the toggle is on, and reports the entropy in bits alongside the password so you can see how strong the result is. The page never stores or transmits the password — it is rendered in the textarea and disappears on refresh.

When to use it

  • Creating a master password for a password manager — 20+ characters, all classes, ambiguous-pairs off
  • Generating a unique password for an account you are signing up for right now
  • Producing a high-entropy passphrase-style token for a CI/CD secret
  • Auditing an existing password's entropy (paste it in, see the bit count, decide whether to rotate)

When not to use it

  • You need a memorable passphrase — switch to the diceware tool on the site for word-based passwords
  • You need an API key with a specific format — generate here, then adapt to the format the service expects
  • You need to share the password over an insecure channel — paste it into your password manager, never email it

Frequently asked questions

Is the password sent anywhere?

No. The generator runs in your browser using crypto.getRandomValues. The password appears in the textarea and is not transmitted, logged, or stored. Refresh the page and it is gone.

How many bits of entropy do I need?

For a password protecting a single account against online guessing attacks, 60 bits is comfortable. For a master password or a high-value secret, aim for 100 bits or more. The page reports the bits next to the password so you can see the math.

Why avoid ambiguous characters?

When you have to read the password aloud or type it from a screenshot, characters that look alike (l / 1 / I, O / 0) cause copy errors. The toggle trades a small amount of entropy for a much lower chance of a typo. Turn it off for machine-only passwords.

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