Generador de contraseñas
Choose length and character classes. The generator draws from the browser’s cryptographic random source when available.
Esta página traduce el original en inglés. El motor de cálculo es el mismo.
Respuesta rápida
It builds a string from the selected alphabet using secure randomness in the client.
Ejemplo: 16 characters with upper, lower, digits and symbols is a common default; longer is stronger if you can store it.
Los cálculos siguen la fórmula de esta página; el redondeo y las unidades pueden cambiar el último dígito. Trate el resultado como una estimación educativa.
* Estimación. Los importes reales pueden variar según las hipótesis.
Qué hace esta calculadora
It builds a string from the selected alphabet using secure randomness in the client.
Para quién es
Anyone creating a new password who wants the generation to stay on-device.
Cómo funciona el cálculo
A cryptographically strong RNG picks indices into the allowed character set until the requested length is reached.
Fórmula
Uniform draws from the selected alphabet. No password is derived from your name or the page URL.
Supuestos
- The browser provides crypto.getRandomValues or an equivalent.
- You store the result in a password manager.
Limitaciones
- Does not check whether a password has appeared in a public breach.
- A short alphabet reduces strength even at long lengths.
Cómo usar esta herramienta
- 1Set the length.
- 2Toggle character classes.
- 3Copy the result into a password manager — not into email.
Preguntas frecuentes
- Do you store the password?
- Generation is client-side. We do not need the password to render the page.
- Is longer always better?
- Length helps, but a tiny character set or a reused password still fails.