Password Generator
Create strong, secure random passwords with customizable options. Choose length, include uppercase, lowercase, numbers, and special characters.
Create strong, secure random passwords with customizable options. Choose length, include uppercase, lowercase, numbers, and special characters.
FAQ
How to Use the Password Generator
-
Set your password length
Drag the slider or type a number to choose between 4 and 64 characters. For most accounts 16+ characters is recommended. -
Choose character types
Toggle uppercase (A-Z), lowercase (a-z), numbers (0-9), and symbols (!@#$). Enabling more types increases entropy significantly. -
Optionally exclude ambiguous characters
Check "Exclude Ambiguous Characters" to remove visually similar glyphs (0, O, l, 1, I). Useful for passwords you need to transcribe manually. -
Generate, copy, and store
Click Generate Password. Use the clipboard button to copy, then save it in a password manager — never in a plain text file.
Example Output
Sample passwords generated with different settings:
| Settings | Length | Example |
|---|---|---|
| All types | 16 | mX7!qR2@nL5#kP9$ |
| Letters + numbers | 20 | aB3cD4eF5gH6iJ7kL8mN |
| Symbols excluded | 12 | T4jKmR8xNpQv |
| No ambiguous | 16 | Kp7nQx2mTr8wYv3e |
Common Use Cases
Online Accounts
Create unique passwords for each email, social media, or banking account. Reusing passwords across sites is one of the most common security mistakes.
Wi-Fi Networks
Generate strong passphrases for home and office wireless networks that are hard to brute-force yet easy to share via QR code.
Database & API Credentials
Secure database users, API tokens, and service account passwords with long, fully random strings that no dictionary attack can crack.
SSH & VPN Keys
Use strong generated passwords for SSH passphrases or VPN pre-shared keys, adding an extra layer to your server access.
Development & Testing
Populate staging environments with realistic credential sets for integration tests, CI pipelines, and demo databases.
How It Works
All password generation happens inside your browser. No data ever leaves your device.
The tool calls window.crypto.getRandomValues() — the same cryptographic API used by your browser for TLS. It produces true randomness, unlike Math.random().
Based on your selected options the tool builds a pool of allowed characters, then independently samples from it for each position using the secure random source.
Strength is estimated from length × character-type diversity. Each additional character type expands the keyspace exponentially, displayed in the progress bar.
Who This Tool Is For
Everyday Users
Anyone who wants a quick, trustworthy password without installing software.
Developers
Generate secrets, tokens, and credentials for projects and CI/CD pipelines.
System Administrators
Create secure credentials for servers, databases, and network devices.
Security Professionals
Quickly produce high-entropy passwords for penetration testing scenarios.
Businesses
Enforce a strong password policy by standardising generation across your team.
Tips for Better Password Security
- Always store generated passwords in a reputable password manager (Bitwarden, 1Password, KeePass) — never in a spreadsheet.
- Use a unique password for every account. Credential-stuffing attacks rely on people reusing the same password.
- Length matters more than complexity. A 20-character all-lowercase password has more entropy than a 10-character mixed-case one.
- Pair strong passwords with two-factor authentication (2FA) for critical accounts like email and banking.
- Rotate passwords for shared or admin accounts periodically, and immediately after any suspected breach.
Why Strong Passwords Matter
- Over 80% of hacking-related breaches involve weak or stolen credentials (Verizon DBIR).
- Brute-force attacks can crack an 8-character lowercase password in under an hour with modern GPUs.
- A 16-character mixed password has 95^16 ≈ 4.4 × 10^31 possible combinations — practically unbreakable.
- Password managers paired with long random passwords are the single most effective personal security measure.
Performance & Privacy
The generator runs entirely in your browser using vanilla JavaScript and the Web Crypto API. No password, setting, or usage data is transmitted to our servers — ever. The tool loads in milliseconds and requires no registration, no cookies, and no external dependencies. You can even use it offline after the first page load.
Educational Note: Password Entropy
What is Entropy?
Password entropy is measured in bits and represents how unpredictable a password is. Higher entropy = harder to crack.
Entropy Formula
Entropy (bits) = log₂(N^L), where N is the character pool size and L is the password length. A 16-char password from a pool of 95 chars has ~104 bits.
NIST Guidelines
NIST SP 800-63B recommends at least 8 characters, but modern guidance suggests 15+ characters with no mandatory complexity rules.
Passphrases vs Passwords
Long passphrases (e.g., "correct-horse-battery-staple") can rival random passwords in entropy while being easier to remember.
Troubleshooting
Did You Know?
The "Have I Been Pwned" database contains over 10 billion compromised passwords from public breaches. Using a random generator virtually eliminates the chance of generating a password that appears in breach lists, since each output is statistically unique.
Your Security Starts Here
A strong, unique password is the first line of defense for every account you own. This free tool makes it effortless to generate cryptographically secure passwords in seconds — no signup, no tracking, no server calls. Combine it with a password manager and two-factor authentication, and your digital accounts become exponentially harder to compromise. Generate yours now and stay secure.