Best Tools · Seguridad
Mejores Generadores de Contraseñas Gratuitos 2026
Las contraseñas fuertes son la primera línea de defensa contra el hacking. Revisamos los mejores generadores de contraseñas gratuitos para ayudarte a crear contraseñas irrompibles al instante.
#1
Contraseña Generador
General-purpose strong password generation
Genera contraseñas seguras online gratis. Longitud personalizable, tipos de caracteres, excluir ambiguos, indicador de fortaleza, copiar al portapapeles. 100% privado.
✅ Pros
- Custom length 4-64
- All character types
- Strength meter
- 100% private
#2
Aleatorio Cadena Generador
Generating random strings and keys
Genera cadenas aleatorias con longitud y caracteres personalizables. Generador online gratuito en tu navegador.
✅ Pros
- Custom character sets
- Multiple strings
- Copy to clipboard
#3
UUID Generador
Developers needing unique identifiers
Genera identificadores únicos universales (UUID) versión 4. Generador UUID online gratuito en tu navegador.
✅ Pros
- UUID v1 and v4
- Batch generation
- Instant
#4
Hash Generador
Generating cryptographic hashes
Genera hashes MD5, SHA1, SHA256 y más. Generador de hash online gratuito en tu navegador.
✅ Pros
- MD5, SHA-1, SHA-256
- Batch support
- Fast
#7
AES Encryptor
Encrypting sensitive data
Cifra y descifra texto usando el algoritmo AES. Herramienta online gratuita para protección segura de datos.
✅ Pros
- AES-256 encryption
- Text and files
- Private
#8
Contraseña Fortaleza Verificador
Checking password strength
Comprueba la fortaleza de tus contraseñas con análisis en tiempo real. Verificador online gratuito en tu navegador.
✅ Pros
- Real-time analysis
- Detailed report
- Tips
#9
Aleatorio Número Generador
Generating random numbers
Generate random numbers within a custom range for lotteries and sampling. Free online random number generator for games.
✅ Pros
- Custom range
- Multiple numbers
- Free
#10
Dado Rodillo
Gaming and random selection
Roll virtual dice with customizable sides and count. Free online dice roller for board games, RPGs, and random generation.
✅ Pros
- D4 to D20
- Multiple dice
- Visual
Frequently Asked Questions
Are these password generators safe to use?
Yes. The best generators create passwords locally in your browser using the Web Crypto API — nothing is ever sent to a server.
What makes a password strong?
Length matters most. A 16+ character password mixing upper and lowercase letters, numbers, and symbols would take centuries to brute-force.
Do these tools store the passwords they generate?
No. A trustworthy generator never stores or transmits generated passwords — always save yours in a password manager.
How to Choose the Best Tool
When choosing a tool, consider your specific needs: file size limits, processing speed, privacy guarantees, and batch processing capabilities. All recommended tools have been tested by our team.