Random Password Generator

Generated Password

Password Length 16

4 32 64 96 128

Character Types

Uppercase Letters A–Z Lowercase Letters a–z Numbers 0–9 Symbols !@#…

Advanced Options

Exclude Confusing Characters 0O1lI No Repeated Characters

Use Custom Character Set When enabled, passwords are generated only from the characters entered here, ignoring character type options

Batch Generate

Quantity:

📖 About Password Security

Weak (Entropy < 40 bits)

Easily cracked by brute force, usually all digits or very short passwords.

Medium (Entropy 40–59 bits)

Basic security, but not suitable for protecting important accounts; increasing length is recommended.

Strong (Entropy 60–79 bits)

Suitable for most scenarios with good resistance to cracking.

Very Strong (Entropy ≥ 80 bits)

High security level, recommended for important accounts and encryption keys.

Password EntropyThe core metric for measuring password strength:Entropy = log₂(character set size ^ password length)

The larger the character set (uppercase + lowercase + numbers + symbols), the higher the entropy per character.
The longer the password, the higher the total entropy, making cracking exponentially harder.
This tool uses the browser's built-in crypto.getRandomValues password generator for stronger randomness.
Passwords are never uploaded to the server; everything is done locally.

⚠️ Recommendations:For important accounts, use passwords with length ≥ 16, including uppercase, lowercase, numbers, and symbols, and use a password manager.