Free Secure Password Generator
Create strong, customized passwords and memorable passphrases securely in your browser. All generation is done locally on your device using a cryptographically secure RNG — nothing is ever sent to a server.
Session History
- No passwords generated in this session yet.
How it works
When you press Generate New, the tool uses your browser’s cryptographically secure random number generator to draw unpredictable values directly on your device. No data is sent over the network, so your credentials stay invisible to any server or third party.
For Standard Passwords the generator builds a pool from the character sets you enable, guarantees at least one character from each selected set, then fills the remaining length and shuffles with a Fisher–Yates pass. For Passphrases it draws distinct words from a curated local dictionary and joins them with your chosen separator and casing. Entropy in bits is computed instantly and shown beside the strength meter.
What you get
- Single live output — large, readable mono display with eye-toggle and one-click copy.
- True 4-stage strength — 4-segment bar and bit count that update instantly from entropy math.
- Two modes in one toggle — Standard Password (length + character sets) or Memorable Passphrase (words + separator + casing).
- Private generation — uses
crypto.getRandomValueslocally; works offline after load. - Session history — reuses the clean list-row pattern with per-item copy, no clutter.
Frequently Asked Questions
No. All calculations run in your browser sandbox. The generator works offline after the page loads — we never store, view, or log any credentials you generate.
We keep a static dictionary of over 600 clear English words. The generator picks words with secure random indexes and concatenates them with your chosen divider — hyphen, underscore, dot, space, or none — applying the casing you select.
Ordinary Math.random() is predictable. A CSPRNG draws entropy from hardware sources so outputs cannot be modelled from previous values. We use window.crypto.getRandomValues with rejection sampling and a secure shuffle for every generation.