This strong password generator creates random passwords and passphrases on your device. It uses the Web Cryptography API method crypto.getRandomValues, which draws from your browser’s cryptographically secure random number generator — not Math.random(), which is not meant for secrets. The result is not sent to Impulsblog, stored in a cookie, or submitted in a form. If you close the tab, it is gone unless you copied it.
This page contains no affiliate links. See our affiliate disclosure and how we review. By Impulsblog Editorial. Updated: November 2026
Bottom line: generate secrets here, store them in a password manager
- Passwords and passphrases are created locally with crypto.getRandomValues.
- A 16-character mixed password, or a five-word EFF passphrase, is a solid starting point.
- Copy the result into a password manager and use a different secret for every account.
- To see whether an existing password has appeared in a known breach, use the password strength checker.
Generate a password or passphrase
Generated secret
Generated on this device only. Copy it into a password manager — this page does not save it.
How a strong password is made
A password is strong when it is long, unpredictable, and unique. This tool picks each character, or each passphrase word, from the options you selected, using secure randomness. The strength label is an entropy estimate based on length and the size of the character set or word list. It is a useful guide, not a guarantee that a password cannot be guessed or that a website will accept every symbol.
Random passwords work best when you will store them in a manager and never type them from memory. A passphrase of several unrelated words is often easier to enter by hand — for example on a TV, a friend's computer, or a device with a painful keyboard. This tool's passphrases are drawn from the Electronic Frontier Foundation's large wordlist, published under a Creative Commons Attribution license.
How to use what you generate
Copy the result into a password manager, then save an entry for the site or app you are protecting. Use a different password for every account. Do not paste generated passwords into email, chat, or a notes app that syncs in plain text. If you need to check whether an existing password has appeared in a known breach, use our password strength checker, which can compare a hash prefix against the Have I Been Pwned range API without sending the password itself.
What this tool does not do
It is not a password manager, and it does not remember anything after you leave. It does not test whether a password has been breached, and it cannot see whether a website will accept the characters you selected. Some sites reject symbols or cap length; if that happens, adjust the options and generate again, still aiming for at least 16 random characters or a five-word passphrase. For help choosing a manager, start with our best password managers guide.
FAQ
Does this password generator send my password to a server?
No. The password or passphrase is created in your browser with crypto.getRandomValues. Impulsblog does not receive, store, or log it.
Is a 16-character random password strong enough?
A 16-character password drawn from mixed letters, numbers and symbols is a solid default for most accounts, because the search space is very large. Longer is better if a site allows it. Reusing any password, even a long one, is still a risk.
What is the difference between a password and a passphrase?
A random password is a string of mixed characters. A passphrase is several unrelated words from a large word list, which is often easier to type by hand. Both can be strong when they are long enough and unique.
Can I use this instead of a password manager?
No. This tool only creates a secret. A password manager stores unique passwords, fills them in, and helps you avoid reuse. Use this generator, then save the result in a manager.
Where do the passphrase words come from?
Passphrases use the Electronic Frontier Foundation's large wordlist (7,776 words), published under a Creative Commons Attribution 3.0 license. That list is designed for memorable, randomly chosen phrases.
Related guides: Password strength checker · Best password managers (2026) · Bitwarden vs 1Password · Bitwarden vs Proton Pass