01
Choose random or passphrase mode
Switch between high-entropy random strings and readable Diceware passphrases depending on whether you need to type the password by hand.
Strong Password Generator Online
Create secure, memorable passphrases or generate multiple high-entropy passwords in bulk. View live entropy stats and crack time calculations.
Strong Passwords
Strong Password & Passphrase Generator
Entropy0 bits
Brute Force TimeMilliseconds
Length0 chars
3 words (36 bits)4 words (48 bits)5 words (60 bits)6 words (72 bits)8 words (96 bits)
100% Secure & Private
Processed locally in your browser. No data is sent to our servers.
How to use
Use this diceware passphrase generator in three simple steps
Our workflow is designed to be straightforward, allowing you to complete your task in seconds.
02
Set complexity and batch size
Dial in length, character sets, or word count, then choose how many passwords to generate at once for bulk credential creation.
03
Review entropy and copy all
Check the entropy in bits and estimated crack time, then copy a single result or export the whole batch in one click.
Passphrase Mode
Generates readable word-based sequences like 'correct-horse'.
Bulk Generation
Create up to 50 unique passwords simultaneously in one click.
Strength Metric
Rates your password strength dynamically to ensure safety.
Zero Data Logging
No network requests are made, protecting your credentials.
Use cases
Useful for different workflows
Bulk Provisioning
Create list catalogs of secure passwords for migrations.
High Entropy Setup
Custom character pools and length scales for servers.
Safe Passphrases
Create memorable but strong passphrase collections.
Tool guide
What is a Passphrase?
A passphrase is a sequence of random words that functions as a highly secure password. The concept was popularized by Diceware. Because it uses full words instead of random character jumbles (e.g. correct-horse-battery-staple vs 9#kL!p2$q), it is much easier to visualize and remember, dramatically reducing the habit of writing passwords on sticky notes.
This tool focuses on memorable passphrases, live entropy scores, and bulk generation. If you just need one quick character-based password for a single signup, the Random Password Generator is the faster choice.
Understanding Password Entropy
In cybersecurity, password strength is not just about characters; it is about entropy (calculated in bits). Entropy represents the number of attempts a computer would have to make to guess the combination. Every extra word or character multiplies the search space exponentially, pushing crack times from milliseconds to trillions of years.
Generating Passwords in Bulk
When launching new services, databases, or API clients, you often need multiple high-entropy credentials. Our bulk generation tool allows you to create up to 15 unique, high-complexity passwords at once. Each password includes uppercase letters, lowercase letters, numbers, and special symbols to satisfy the strictest security policies.
FAQ
Frequently asked questions
What is a Diceware passphrase?
A Diceware passphrase is a security code composed of random, readable English words. It is designed to be highly secure from hackers yet easy for a human to memorize without writing it down.
How is entropy calculated?
Entropy measures the randomness of a password in bits. Higher bits represent exponential complexity. A password with >60 bits of entropy is considered highly secure for standard online usage.
Why should I generate passwords in bulk?
Bulk generation allows developers and sysadmins to create dozens of unique, secure keys for config files, database connections, or bulk user enrollments quickly.
Should I use a passphrase or a random password?
Use a memorable Diceware passphrase for logins you type often, like your device or password manager, and random strings for accounts you rarely enter by hand.
Are the generated passwords sent anywhere?
No. Every password and passphrase is generated locally in your browser and never transmitted, so nothing is logged or stored on our servers.
From our blog
Generate Passwords in Bulk, Fast
Read the full guide behind the Strong Password Generator Online and get the most out of it.
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