Password Generator
Create strong, random passwords with a live strength meter and entropy readout. Generated locally with crypto-grade randomness.
Generated Password
Entropy: 103 bits — higher is harder to brute-force.
Options
By Vizo ToolLast updated August 20264 min read
Password Generator — Strong, Random Passwords with Entropy
The Password Generator creates cryptographically strong random passwords in your browser. Choose the length and character sets — uppercase, lowercase, numbers, and symbols — and a live strength meter plus entropy readout tell you exactly how secure each password is.
Options like excluding similar characters (1, l, I, 0, O) make passwords easier to type on any keyboard, and because generation uses the browser's crypto API, no password ever leaves your device.
- Entropy calculation
- Strength meter
- Exclude similar chars
- Cryptographic randomness
Why Use Password Generator?
Crypto-Grade Randomness
Uses the browser's cryptographic random generator — not Math.random().
Live Strength Meter
See weak-to-strong feedback with a color-coded meter as options change.
Entropy Readout
Bits of entropy quantify exactly how resistant the password is to brute force.
100% Private
Passwords are generated on your device and never transmitted anywhere.
Features
Length Control
Adjust password length from 4 to 64 characters with a slider.
Character Sets
Toggle uppercase, lowercase, numbers, and symbols independently.
Exclude Similar
Remove easily confused characters like 1/l/I and 0/O.
Strength Meter
Color-coded weak/fair/good/strong feedback based on character pool and length.
Entropy Display
Shows bits of entropy so you can compare password strength objectively.
One-Click Copy
Copy the generated password with a single click.
How to Generate a Strong Password
Create a secure password in three steps.
Set the options
Choose the length and toggle the character sets you want included.
Check the strength
Review the strength meter and entropy — aim for at least 60–80 bits.
Copy & use it
Copy the password and use it in your accounts. Consider a password manager.
Frequently Asked Questions
Got questions? We've got answers.
How does the password generator work?▼
It uses the browser's cryptographically secure random number generator to pick characters from the enabled sets — no pattern, no predictability.
Is it free?▼
Yes, completely free with no sign-ups or limits.
Are generated passwords sent anywhere?▼
No. Generation happens locally on your device; passwords are never transmitted.
What is entropy?▼
Entropy measures unpredictability in bits. Each bit doubles the guesses needed, so 80+ bits is generally considered strong.
How strong should my password be?▼
Aim for at least 12–16 characters across multiple character sets, which this tool typically rates 80+ bits.
Should I use symbols?▼
Symbols expand the character pool and raise entropy, but length matters more. Many password managers recommend passphrases instead.
What does 'exclude similar characters' do?▼
It removes characters like 1, l, I, 0, and O that are easy to confuse, making the password easier to type.
Can I choose the length?▼
Yes, from 4 to 64 characters via a slider.
Is this password safe to reuse?▼
Never reuse passwords across sites. Generate a unique password for every account and use a password manager.
Does it work offline?▼
Yes — once the page is loaded, generation works entirely offline in your browser.
Does it work on mobile?▼
Yes, the tool is fully responsive.
Why is my short password rated weak?▼
Short passwords with few character sets have low entropy, so they're rated weak — lengthen it or add character sets.
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