UUID Generator
Generate unique UUIDs for your applications.
Secure Password Generator
Generate strong random passwords and passphrases in one click. Everything runs in your browser.
(1-50)
What is a Strong Password?
A strong password is one that is difficult for both humans and computers to guess. It achieves this through high entropy, which is a measure of randomness. The more characters a password uses and the larger the pool of possible characters (uppercase, lowercase, numbers, symbols), the higher its entropy and the harder it is to crack by brute force. A truly strong password is randomly generated rather than based on dictionary words, birthdays, or other predictable patterns.
How to Use This Tool
- Choose between password mode (random characters) and passphrase mode (random words)
- Adjust length with the slider or type a value directly (6-64 characters)
- Toggle character sets on or off to meet specific site requirements
- Switch to passphrase mode for memorable yet strong credentials
- Use the count field to bulk-generate up to 50 passwords at once
- Check the entropy-based strength meter to verify your configuration is secure
- Click Copy to send any password to your clipboard instantly
Common Use Cases
- Creating unique passwords for each online account
- Generating API keys and secret tokens for development
- Producing temporary passwords for new employee accounts
- Building passphrases that are easy to type on mobile devices
- Bulk-generating credentials for test environments or demos
Tips
- Use at least 16 characters (or 5+ words for passphrases) for strong security
- Never reuse passwords across different accounts
- Store generated passwords in a reputable password manager
- Enable two-factor authentication wherever possible for added protection
- This tool uses
crypto.getRandomValues(), a cryptographically secure random number generator -- your passwords never leave your browser
FAQs
What makes a password strong?
A strong password has high entropy — meaning it is long (16+ characters), uses a mix of uppercase, lowercase, numbers, and symbols, and is randomly generated rather than based on dictionary words or personal information.
Why use crypto.getRandomValues() instead of Math.random()?
Math.random() is a pseudo-random number generator that is predictable and not suitable for security. crypto.getRandomValues() uses a cryptographically secure random number generator (CSPRNG) provided by the operating system.
What is a passphrase and is it better than a password?
A passphrase is a sequence of random words like "correct horse battery staple". Passphrases are easier to remember while maintaining high entropy. A 4-6 word passphrase from a large wordlist can be as strong as a 20+ character random password.
What is password entropy?
Entropy measures password strength in bits. It is calculated as log2(characters^length). For example, a 16-character password using 72 possible characters has about 98 bits of entropy. 80+ bits is considered strong for most uses.
How many passwords should I generate to find a good one?
With a properly configured generator, every password it produces is equally strong. Generate one and use it. If you need multiple passwords (e.g. for different accounts), use the bulk generation feature.
Is Free Secure Password Generator Online — Random, Strong Passwords free to use?
Free Secure Password Generator Online — Random, Strong Passwords is completely free and runs in your browser.
Does Free Secure Password Generator Online — Random, Strong Passwords send my data to a server?
No. Free Secure Password Generator Online — Random, Strong Passwords processes input directly in your browser.
Do I need to create an account to use Free Secure Password Generator Online — Random, Strong Passwords?
No account is required to use Free Secure Password Generator Online — Random, Strong Passwords.
Privacy-first by design
Tool inputs are processed in your browser. Review the Privacy Policy and Terms for full details.
Related Tools
All ToolsOpen Tool →
Hash Generator
Generate MD5, SHA1, SHA256 hashes securely.
HMAC Generator
Generate HMAC digests using SHA-1/256/512.
Color Palette Generator
Generate Tailwind palettes, CSS variables, and WCAG contrast checks.