Strong Password Generator
Strong random passwords, created on your device with your browser’s cryptographic generator.
- Never leaves your device
- No sign-up
Strength: Very strong · 100 bits of entropy
Generated on your device with your browser’s cryptographic generator. Never stored or sent.
Quick answer: To generate a strong password, choose a length (16 or more is recommended) and the character types: the password appears instantly with its strength rating. Copy it and save it in a password manager. Nothing is stored or sent.
How to do it in 3 steps
- 1Choose the password length.
- 2Select letters, numbers and symbols.
- 3Copy the generated password.
Why use Pronto Arquivo
Truly random
Uses crypto.getRandomValues, the same generator used in cryptography.
Strength meter
Shows the entropy in bits and the password’s strength level.
No look-alike characters
Option to skip 0/O and 1/l/I when you’ll be typing the password by hand.
Never leaves your device
The password is never stored or sent.
Guides
How long should it be?
With letters, numbers and symbols, 12 characters already exceed 75 bits; 16 characters exceed 100 bits, out of reach for brute-force attacks.
One password per site
Data breaches happen. Use a different password for every account and keep them in a password manager.
Frequently asked questions
What makes a password strong?
Length (12+ characters), randomness, and a mix of uppercase, lowercase, numbers and symbols.
Is the generated password saved?
No. It only exists on your screen until you copy it.
How many characters should a password have?
At least 12; 16 or more is ideal.
Can I generate a password without symbols?
Yes. Uncheck symbols and increase the length to keep it strong.