Why Strong Passwords Matter
In today’s digital world, strong passwords are your first line of defense against unauthorized access to your accounts and personal information. Weak passwords are one of the most common causes of security breaches, with attackers using automated tools that can test billions of password combinations per second.
A strong password protects your email, banking, social media, and other critical accounts from unauthorized access. Using unique, complex passwords for each account ensures that if one password is compromised, your other accounts remain secure.
Understanding Password Strength
Length vs Complexity
Both length and complexity contribute to password strength, but length is generally more important. A 20-character password using only lowercase letters is typically stronger than an 8-character password using all character types.
Every additional character exponentially increases the time needed to crack a password. A password that might take seconds to crack at 8 characters could take centuries at 16 characters.
Entropy Explained
Entropy measures the randomness or unpredictability of a password, expressed in bits. Higher entropy means a more secure password. Our tool calculates entropy based on the character set size and password length.
- 40-60 bits: Reasonable for low-security accounts
- 60-80 bits: Good for most applications
- 80-100 bits: Strong for sensitive accounts
- 100+ bits: Very strong, suitable for critical systems
Common Password Attacks
Brute Force: Trying every possible combination. Longer passwords with diverse characters resist this attack.
Dictionary Attacks: Using common words and phrases. Avoid real words, names, and predictable patterns.
Credential Stuffing: Using leaked passwords from other sites. Never reuse passwords across accounts.
Social Engineering: Guessing based on personal information. Don’t use birthdays, names, or other personal data.
How to Use This Tool
Step 1: Choose a mode - Select from random, pronounceable, passphrase, or PIN depending on your needs.
Step 2: Set the length - Longer passwords are more secure. We recommend at least 16 characters for important accounts.
Step 3: Configure character types - Include uppercase, lowercase, numbers, and symbols for maximum strength.
Step 4: Generate - Click the generate button to create secure passwords using cryptographic randomness.
Step 5: Copy and save - Store your password in a password manager—never write it down or save it in plain text.
Password Modes Explained
Random Passwords
The most secure option for computer-generated passwords. Uses cryptographically secure randomness to create passwords with no patterns or predictable elements. Best for accounts where you’ll copy/paste the password.
Pronounceable Passwords
Creates passwords that alternate consonants and vowels, making them easier to type and remember while still maintaining reasonable security. Good for situations where you might need to type the password manually.
Passphrases
Combines multiple random words with separators and numbers. Passphrases are long, making them very secure, while being easier to remember than random character strings. Example: “Falcon-Harbor-Crystal42”
PIN Mode
Generates numeric-only passwords for situations that require PINs, such as phone lock screens or banking apps. While less secure than alphanumeric passwords, a sufficiently long PIN provides adequate protection for most uses.
Password Best Practices
Use unique passwords: Never reuse passwords across different accounts. If one account is breached, others remain protected.
Use a password manager: Tools like 1Password, Bitwarden, or LastPass securely store your passwords and help generate new ones.
Enable two-factor authentication: Even the strongest password benefits from an additional layer of security.
Change passwords after breaches: If a service you use reports a data breach, change that password immediately.
Avoid personal information: Don’t use names, birthdates, addresses, or other information that could be guessed or found online.
Don’t share passwords: If you must share account access, use built-in sharing features or create a separate account.
Character Set Details
Our password generator uses these character sets:
Uppercase Letters (26): A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Lowercase Letters (26): a b c d e f g h i j k l m n o p q r s t u v w x y z
Numbers (10): 0 1 2 3 4 5 6 7 8 9
Symbols (32): ! @ # $ % ^ & * ( ) _ + - = [ ] { } | ; : , . < > ?
Using all character types provides the largest character set (94 characters), maximizing password entropy.
Excluding Ambiguous Characters
Some characters look similar in certain fonts, which can cause problems when reading or typing passwords:
Ambiguous: l (lowercase L), 1 (one), I (uppercase i), O (uppercase o), 0 (zero)
Enable “Exclude ambiguous” when you might need to manually type or read the password from a printed document.
Security and Privacy
This password generator runs entirely in your browser using JavaScript’s crypto.getRandomValues() API, which provides cryptographically secure random numbers. Your passwords are never sent to any server—they’re generated and displayed locally.
You can verify this by monitoring your browser’s network tab while using the tool. No network requests are made during password generation.
Frequently Asked Questions
How secure are these passwords?
Extremely secure. The tool uses cryptographic randomness (the same type used for encryption) and generates passwords with high entropy. A 16-character password with all character types would take longer than the age of the universe to crack by brute force.
Should I write down my password?
No. Store passwords in a reputable password manager. If you must write it down, keep it in a secure location separate from the device or service it protects.
How long should my password be?
For important accounts, use at least 16 characters. For critical accounts like banking or primary email, consider 20-24 characters or a 4+ word passphrase.
Are passphrases as secure as random passwords?
Yes, when sufficiently long. A four-word passphrase provides roughly 50-60 bits of entropy, which is comparable to a 10-12 character random password. Longer passphrases are even more secure.
Why does my password sometimes not include all character types?
When you select multiple character types, the tool guarantees at least one character from each selected type, then fills the rest randomly. For very short passwords, there may not be room for variation.
Start Generating
Use the tool above to create secure passwords for all your accounts. With cryptographic security and customizable options, you can generate passwords that are both secure and suited to your specific needs.