A password generator lets you create strong, random passwords instantly. This tool runs in your browser, uses cryptographic randomness, and allows you to customize length, character sets, and strength. You can include lowercase letters, uppercase letters, numbers, and symbols, and even avoid similar characters for readability. Every password is generated locally, so nothing leaves your device.
Password Generator
Create strong passwords with instant entropy estimate and a simple strength meter.
- Use at least 12 characters for accounts
- Use symbols only if the site allows them
- Do not reuse a password across sites
Do not get lost! Hit Ctrl+D (Windows) or Command+D (Mac) to bookmark this tool for instant access.
Why Use a Password Generator
Weak passwords are the main reason accounts get hacked. People often reuse the same password across multiple websites or create predictable ones like Password123. Attackers use brute force tools and leaked password lists, which makes simple passwords unsafe.
Using a random password generator ensures your password is:
- Unpredictable: no dictionary or pattern
- Unique: different from every other account
- Strong: high entropy makes it nearly impossible to crack
Instead of relying on your memory, you can generate secure passwords and store them in a password manager.
How to Use This Password Generator Step by Step
- Choose the length of the password (default is 16 characters)
- Select character sets: Lowercase letters (a–z), Uppercase letters (A–Z), Digits (0–9), Symbols (!@#$% and more), Avoid similar characters (no confusing l, I, 1, 0, O)
- Click Generate to create a new random password
- Copy the password with one click
- Check the entropy estimate and strength bar to see how secure it is
Example 1: Generate a 12-Character Password
Settings:
Length: 12
Character sets: lowercase + uppercase + digits
Password: D7fWk2aR9mLs
Entropy: 71
This is strong enough for most website accounts, as brute force would take centuries.
Example 2: Generate a 20-Character Password With Symbols
Settings:
Length: 20
Character sets: include all sets
Password: pR!aK&y3Z4^qW1*Vt8G
Entropy: 118
This is extremely strong and suitable for banking, crypto wallets, or admin panels.
Example 3: Generate a Simple 8-Character Password Without Symbols
Settings:
Length: 8
Character sets: lowercase + digits
Password: z7k9q2mb
Entropy: about 41 bits
This is weaker, but may be required for older systems that do not accept special characters. You should only use short passwords like this when forced by a site’s restrictions.
Features of This Password Generator
- Customizable length (4 to 128 characters)
- Multiple character sets (letters, digits, symbols)
- Option to avoid similar characters for readability
- Entropy estimate shows how secure the password is
- Strength bar visualizes complexity
- One-click copy button
- All work happens locally in your browser
What Makes a Strong Password
A strong password has two main qualities:
- Length: The longer, the better. Each extra character multiplies the number of possibilities.
- Entropy: A measure of unpredictability, usually expressed in bits.
For example:
- A 12-character password with letters and numbers has around 71 bits of entropy
- A 16-character password with full sets (letters, numbers, symbols) has over 100 bits of entropy
- Attackers cannot brute force passwords above 80–90 bits with current technology
Common Use Cases
- Website accounts: Unique passwords for each account prevent credential stuffing
- Admin dashboards: Protect sensitive systems with high-entropy passwords
- API keys: Generate random strings for authentication tokens
- Wi-Fi networks: Replace default router passwords with strong ones
- Encryption keys: Create random inputs for file or data encryption
Why Entropy Matters
Entropy measures how many guesses an attacker would need to crack a password.
- 40 bits: breakable within hours by a determined attacker
- 60 bits: safe for low-risk accounts
- 80+ bits: strong security against brute force
- 100+ bits: effectively unbreakable with current computing
This tool shows entropy so you can choose strength based on your needs.
Best Practices for Password Security
- Use at least 12 characters for regular accounts
- Use 16+ characters with all sets for sensitive accounts
- Never reuse passwords across multiple sites
- Store passwords in a password manager instead of memory
- Enable two-factor authentication (2FA) wherever possible
Frequently Asked Questions
Q: What does this password generator do
A: It creates random, cryptographically secure passwords using the browser’s Web Crypto API.
Q: Is my password safe
A: Yes. All generation happens locally in your browser. Nothing is sent to servers.
Q: How long should my password be
A: At least 12 characters for everyday accounts, and 16+ for high-value accounts.
Q: Why does the tool show entropy
A: Entropy shows how difficult it would be for an attacker to guess your password. Higher is better.
Q: Can I use symbols
A: Yes, but only if the website allows it. Some old systems restrict special characters.
Q: What does avoid similar characters mean
A: It removes confusing characters like l, I, 1, 0, O, making the password easier to type or read.
Q: Do I need a password manager
A: Yes. A manager lets you store all generated passwords securely, so you do not have to memorize them.
Real-World Examples of Password Use
- Banking and financial accounts: Generate a 20-character password with all sets. Example: R3m@qX9y!Vt4K7p*Za2L
- Work accounts: Generate a 16-character password with letters and digits only if symbols are restricted. Example: Qf9rU7pT2yDb4xLm
- Wi-Fi networks: Generate a 14-character password with mixed case and numbers. Example: kW9tH7jL2vF5pZ
Each of these is unique, strong, and avoids easy patterns.
Thank You Note
I know if you made it this far, you probably really needed this tool. I hope it saved you time and maybe even a bit of frustration. I keep building new tools every week, some small and some surprisingly powerful. You can check out all our free tools here and make sure to bookmark CodeForGeek so you never lose us.
If you have an idea for improvement or something is not working right, just email me at [email protected]. I actually read those messages, and if your suggestion makes sense, I will add it.
Thanks for sticking around till the end. Now go try out your result before you forget why you came here.
