Generate strong, random passwords with full control over length and characters.
Generated locally with your browser’s secure random generator — never sent anywhere.
How do you generate a strong password?
This generator picks characters at random from your selected sets (letters, numbers, symbols) using crypto.getRandomValues, which is suitable for security-sensitive use, and guarantees at least one character from each chosen set. Longer passwords with more character types are stronger. A 16-character password using all four sets has a vast number of combinations, making it extremely hard to brute-force.
Understanding your result
Longer passwords with more character types are stronger. Use a unique password for every account and store them in a password manager.
Formula and method
Characters are chosen at random from your selected sets using crypto.getRandomValues, which is suitable for security-sensitive use. At least one character from each selected set is guaranteed.
Assumptions and limitations
Generation happens entirely in your browser using its secure random source, and nothing is transmitted or stored here. A strong password still cannot protect an account on its own: it must be kept private, never reused, and paired with safe habits. This tool creates passwords but does not manage or remember them.
Worked example
A 16-character password using all four sets has a vast number of combinations, making it extremely hard to guess or brute-force.
How to use this tool
- Set the password length.
- Choose which character types to include.
- Press Generate, then copy your password.
Common mistakes to avoid
- Reusing the same password across multiple sites.
- Choosing very short passwords to make them easier to remember.
About the Strong Password Generator
Create strong, unpredictable passwords using your browser’s cryptographically secure random generator. Choose the length and character types to match any site’s rules.
Who should use this tool
Anyone signing up for a new account, replacing a weak or reused password, or generating credentials for Wi-Fi, devices or shared logins.
Benefits
- Uses a cryptographically secure random source, not a predictable one.
- Lets you tune length and which character sets are included.
- Can exclude look-alike characters to avoid typos.
- Generates locally and never stores or transmits the password.
Practical use cases
- Creating a strong password for a new account.
- Replacing passwords that are weak or reused across sites.
- Generating a Wi-Fi or device password to store in a manager.
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Frequently asked questions
Are these passwords stored?
No. They are generated locally in your browser and never transmitted or saved by Toolzio.
How long should my password be?
Longer is stronger, because each extra character sharply increases the number of possible combinations. Choose a length that meets or exceeds the site's minimum and use as many character types as the site allows. A password manager makes long passwords practical to store and use.
Does the same settings always create the same password?
No. Each generation draws fresh random characters from your browser's cryptographic random source, so running the tool twice with identical settings produces different passwords. This unpredictability is what makes the output hard to guess, which is why you should save any password you intend to keep.