Humans are terrible at randomness. If asked to pick a random number, most will pick 7. If asked to pick a password, we pick names, dates, or "P@ssw0rd".

Computers guess these in milliseconds.

Entropy Explained

Entropy is a measure of "randomness" or "disorder." In passwords, it translates to how hard it is to guess.

Tr0ub4dor&3 (28 bits of entropy) - Hard for humans to remember, easy for computers to guess (common substitutions).
correct horse battery staple (44 bits of entropy) - Easy for humans to remember, hard for computers to guess.

The Power of Passphrases

Using 4 randomly selected words is often more secure than a short, complex jumble of characters.

Using Snapsend's Generator

The Snapsend Password Generator tool has a specific "Passphrase" mode.

It selects words from a dictionary of 2000+ words.
It uses crypto-secure randomness (CSPRNG) in your browser.
It generates a string like bucket-light-railway-jump.

This uses the "Diceware" method. It's high entropy, but you can actually visualize a bucket on a light railway jumping, making it memorable.

Manage It With a Manager

Don't memorize everything. Memorize one master passphrase for a password manager (like Bitwarden or 1Password), and let it handle the rest.