Secure Password / Passphrase Generator

Generate strong credentials locally. Nothing is uploaded. Uses secure randomness (window.crypto) with a PHP fallback on this page.

Length

Character sets

a–z A–Z 0–9 !@#$…

Options

require ≥1 of each set exclude ambiguous (O0Il1|…) avoid 3× repeats

Custom characters (optional)

Exclude characters

Pool size: 0

Entropy (length × log₂(pool)): 0 bits

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Batch generator (create many at once)

Count

#	Password

Words

Mode

Separator

Casing

Extras

add a random digit add a random symbol

Word space: —

Entropy estimate: —

Custom wordlist (optional upload)

Upload a simple .txt with one word per line. Your file never leaves this browser.

Loaded words: 0

About, tips & privacy

Generation happens entirely in your browser using window.crypto.getRandomValues(). If unavailable, this page uses a minimal PHP fallback (random_bytes()) on demand.
Entropy approximation for passwords is length × log₂(pool). Passphrase entropy is words × log₂(list size) (plus small extras for digits/symbols if added).
Suggested targets: ≥80 bits for strong; ≥100 bits for long-term.
Batch tab lets you mint many credentials at once for app seeds, API tokens, etc.
No storage, no tracking, no uploads. Copy your secrets somewhere safe (prefer a password manager).