Free Password Generator

Generate a random password on this page with cryptographically secure randomness. Nothing is stored, and the password is not sent to analytics.

How to use

Choose a length. Sixteen characters is a practical default for a generated password.
Enable the character types you can paste or type (letters, numbers, symbols).
Generate, then copy the password into a password manager — not a notes app you sync everywhere.
Leave or refresh the page when you are done. The result is discarded.

How it works

A password is only as hard to guess as the set it was drawn from and how long it is.

This generator builds a character set from the types you enable (uppercase, lowercase, numbers, symbols) and can drop ambiguous lookalikes such as 0, O, I, l, 1 and |. Each character is chosen with crypto.getRandomValues() and rejection sampling so shorter sets are not biased.

Strength guidance is estimated entropy in bits — length times log2 of the set size — not a made-up score. Refreshing the page discards the result. Generation is local: there is no signup, and MultiConvers does not store the password.

Formula

charset = selected types minus optional ambiguous characters
password[i] = unbiased random character from charset
entropy bits ≈ length × log2(charset size)

Worked examples

Default strong password
Length 20, upper, lower, numbers, symbols → A 20-character password and an entropy estimate in bits
No lookalikes
Length 16, exclude ambiguous characters → A password with 0, O, I, l, 1 and | removed from the set

Useful notes

Do not reuse the same password on multiple sites.
This is not a password manager and does not save anything.
Math.random() is not used.
Generated passwords stay in your browser. They are not uploaded and are not sent to analytics.

FAQ

Is this password generator free?: Yes. There is no signup, no payment and no account.
Are generated passwords uploaded or stored?: No. Generation runs in your browser. The password is not sent to MultiConvers, is not stored, and is not sent to analytics.
How is the password randomized?: The page uses the Web Crypto API (crypto.getRandomValues), not Math.random().
What makes a generated password strong?: Length and an unpredictable character set. A long random string beats a short one with a couple of symbols. Use a unique password per site.
Read more: How to create a strong password
How long should the password be?: For a random generated password, 16 characters is a practical starting point. Longer is stronger if you can store it in a manager.
Read more: How long should a password be?
Is length more important than symbols?: Usually yes. Extra length on a random password adds more possibilities than swapping a letter for a symbol on a short one.
Read more: Password length vs complexity
What does the entropy number mean?: It is an estimate of how many bits of unpredictability the length and character set give you. Longer passwords and larger sets raise the number. It is not a vendor “security score”.
Should I exclude ambiguous characters?: Useful if you will type the password from a printout. Leaving them in keeps the set larger, which adds a little entropy at the same length.

Guides

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