Password Generator
Generate secure random passwords
Features
Cryptographically secure generation
Generate hard-to-predict random numbers with the browser's standard crypto API
Generate up to 100 at once
Specify the length and count to create them in bulk
Fine control of character types and symbols
Freely choose uppercase and lowercase letters, numbers, symbols, and which symbols to use
Exclude easily confused characters
Exclude confusing characters such as IJl1jiOo0 at once
How to Use
Specify the length and count
Enter 4–64 characters using preset buttons or numeric field, and specify the number of passwords to generate in the numeric field
Select the characters to include
Toggle the uppercase, lowercase, numbers, and symbols checkboxes; symbols can also be specified individually
Set exclusion conditions
Adjust precision by turning off easily confused characters or entering characters to exclude
Generate and use the results
Display the list with the generate button, then copy each password or download them all at once
Use Cases
New account registration
Instantly prepare a high-strength password when registering for various services
Periodic password changes
Carry out the recommended updates against leaks without hassle
Generate values for development and testing
Mass-produce initial passwords and API-key-like random strings
Use different passwords per account
Assign a different string per service with bulk generation
Basic Knowledge
Characteristics of Strong Passwords
Password strength relies more on length than complexity. Using 12 or more characters with mixed character types exponentially increases the number of attempts required for brute-force attacks. It's also important to avoid including guessable elements such as names or birth dates.
What is Cryptographic Randomness
Cryptographic randomness is a type of random number that guarantees the next value cannot be predicted. Browsers provide crypto.getRandomValues for this purpose. Ordinary random numbers used in games (Math.random) are predictable and therefore should not be used for password generation.
Why Reusing Passwords is Dangerous
ID and password pairs leaked from a service can be used for automated login attempts to other services (credential stuffing attacks). Since a breach at one service can compromise all accounts, it is essential to use a different password for each service.
Safety and Privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
password generation is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
the generated password and input suggestions are not stored on the server.
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Updates
- update #149
Move password generator reset button to top right of form
- update #138
Easily identify copied passwords in the password generator list
- update #122
Password Generator: Checked character types now guaranteed in all generated passwords
The default generation count has been increased from 8 to 100. Results now display with scrolling within the frame.
- update #105
Password generator now supports bulk selection/deselection of symbols and custom symbol input
- update #96
Improved to prevent spaces from being included when pasting into the symbols field in password generator