Local derivation
PwdSeed combines your master seed with the site label, username, counter, length, and character options in your browser. The seed and generated password are not uploaded or saved by this page.
Seed Password Generator
Generate a repeatable password from a master seed, website name, username, and counter. The same inputs create the same password, and everything runs locally in your browser.
Just need a one-time random password? Use the random password generator.
How seeded password generation works
Enter a private master seed
The master seed is the secret input. PwdSeed does not save it, so you must remember or store it safely yourself.
Add the site and account label
The website name and optional username keep passwords different across accounts even when the same master seed is used.
Use the counter for password changes
Keep counter set to 1 for the first password. If a site requires a reset later, increase it to 2 and generate again.
Seeded vs random passwords
Seeded passwords repeat
The same inputs create the same output, which can be useful when you need to regenerate a password without saving the password itself.
Random passwords change
A normal random password generator creates a new password each time. That is the better default for most people using a password manager.
The seed is critical
If someone gets your master seed and knows the other inputs, they may be able to generate the same passwords.
How PwdSeed derives seeded passwords
Master seedprivate phrase
Site labelgmail.com
Username[email protected]
Counter1, 2, 3...
Repeatable passwordsame inputs, same output
Inputs that change the result
Changing any input changes the password. For example, gmail.com, Gmail, and mail.google.com are different site labels. The same rule applies to the username and counter.
Why the counter matters
The counter gives you a stable way to rotate a password without changing your master seed. Use 1 for the first password, 2 for the next password, and keep the other inputs consistent.
Safety rules for seed passwords
Use a long private seed
A short word, name, date, or reused password is not a safe master seed.
Never enter wallet seed phrases
Do not use crypto wallet recovery phrases, backup phrases, or recovery codes as the master seed.
Keep the inputs consistent
Changing the site label, username, counter, length, or character options changes the generated password.
Use the counter for rotation
When changing a password, increase the counter instead of changing your master seed.
Seed password generator FAQ
What is a seed password generator?
A seed password generator creates the same password again when you enter the same master seed, website name, username, counter, length, and character options.
Is this the same as a random password generator?
No. A random password changes every time it is generated. A seeded password is deterministic, so the same inputs produce the same output.
Does PwdSeed save my seed?
No. The seed password generator runs in your browser and does not save your master seed or generated password.
What happens if I forget one input?
You will not get the same password back. The master seed, website name, username, counter, length, and character options must match.
Should I enter a wallet recovery phrase?
No. Do not enter cryptocurrency seed phrases, wallet recovery phrases, or any other recovery secret into a password generator.
Need a repeatable password now?
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