Are these passwords truly random?

Yes. They use the Web Crypto API's getRandomValues, which provides cryptographically secure random numbers suitable for generating high-entropy secrets.

What length should I use?

At least 16 characters for general use, 20+ for high-security accounts. Each additional character multiplies the search space by the alphabet size.

Which character types should I include?

Include uppercase, lowercase, numbers, and symbols for maximum entropy. Some sites reject symbols; in that case, use a longer alphanumeric password.

What does 'exclude similar characters' do?

It removes visually confusable characters: l, 1, I, O, 0. Useful when passwords must be read or typed manually.

Is the generated password stored anywhere?

No. The password exists only in your browser memory. It is not saved to localStorage, history, or sent to any server. Copy it to your password manager immediately.

Why was my generated password rejected by a website?

Some sites restrict certain symbols or length. Check the site's password policy and adjust the character types or length accordingly, then regenerate.

Generador de contraseñas

Generate strong, cryptographically secure random passwords. Gratis, privado y 100% del lado del cliente.

param.lengthparam.uppercaseparam.lowercaseparam.numbersparam.symbolsparam.excludeSimilarparam.minEachType

Entrada

Probar un ejemplo:

Salida

Local only

Historial reciente

Sin historial aún

Uso

Set the desired password length.
Toggle character types: uppercase, lowercase, numbers, symbols.
Optionally exclude similar characters (l, 1, I, O, 0).
Copy the generated password.

Tareas que usan esta herramienta

Generar a cryptographically secure random password

Crear un high-entropy contraseña usando un cryptographically seguro random generator, con control sobre longitud y carácter sets.

TAREA

Usar un cryptographically seguro pseudorandom número generator

CSPRNGs produce salida indistinguishable de verdadero randomness. Aprender el correct APIs y por qué Math.random() es forbidden en seguridad contexts.

TAREA

Preguntas frecuentes

Are these passwords truly random?: Yes. They use the Web Crypto API's getRandomValues, which provides cryptographically secure random numbers suitable for generating high-entropy secrets.
What length should I use?: At least 16 characters for general use, 20+ for high-security accounts. Each additional character multiplies the search space by the alphabet size.
Which character types should I include?: Include uppercase, lowercase, numbers, and symbols for maximum entropy. Some sites reject symbols; in that case, use a longer alphanumeric password.
¿Qué hace 'exclude similar characters'?: It removes visually confusable characters: l, 1, I, O, 0. Useful when passwords must be read or typed manually.
Is the generated password stored anywhere?: No. The password exists only in your browser memory. It is not saved to localStorage, history, or sent to any server. Copy it to your password manager immediately.
Why was my generated password rejected by a website?: Some sites restrict certain symbols or length. Check the site's password policy and adjust the character types or length accordingly, then regenerate.