Strong Password Generator
Generate strong random passwords: length and character control, no ambiguous characters option, generated locally with crypto randomness. Nothing transmitted.
A strong password is long and random — length beats cleverness every time: a random 16-character password is orders of magnitude harder to brute-force than a "complex" 8-character one. This generator uses your browser's cryptographic random source, never sends anything over the network, and never stores what it creates.
Control length and character sets (including a mode without easily-confused characters like 0/O and 1/l for passwords you will type by hand), and generate one at a time or in batches for initial account setup.
100% in-browser · no upload · no signup · nothing you paste or drop here leaves your device
Password & Passphrase Generator
Generate cryptographically-secure passwords or memorable passphrases. 100% local — nothing is sent anywhere.
Uses crypto.getRandomValues — the same CSPRNG your browser uses for TLS.
This tool runs 100% in your browser. All computation happens locally on your device — your input is never uploaded to any server. Results are for reference only.
Why length and word count beat complexity — illustrated
Strength is entropy — the number of equally likely guesses an attacker must try. Each random character adds log₂(alphabet size) bits; each random word from a list adds log₂(list size). Both grow strength exponentially, but only a passphrase stays memorable.
A 12-char random password from 94 symbols ≈ 79 bits. Four random words from a 7,776-word list ≈ 51 bits. Both dwarf a memorable 8-letter word (a few thousand guesses).
A developer needs an admin password (stored in a vault) and a login passphrase (typed often).
- Admin vault:20 random chars, all classes ≈ 130 bits — set once, never typed
- Human login:4-word passphrase like correct-horse-battery-staple ≈ 51 bits
- The trap:Tr0ub4dor&3! looks strong but is 1 memorable phrase ≈ < 30 bits
- Rule of thumb:Longer and random beats weird. Let the generator pick; measure bits, not feel
About this strong password generator
This page covers random password maker secure, create safe password online, password generator no store, memorable strong password — all the same underlying task as strong password generator. The tool above is FreeToolHub's password gen embedded in full: every feature works right here, and nothing you process is uploaded to any server.
Frequently asked questions
What makes a password strong?
Entropy, which comes from length and true randomness — not from substituting @ for a in a dictionary word. A random 16-character mixed-case alphanumeric password has ~95 bits of entropy; "P@ssw0rd!" has effectively none against modern cracking. Pair generated passwords with a password manager and unique-per-site use.
Is it safe to generate passwords online?
Here, yes: generation uses the browser's crypto.getRandomValues API and the result is never transmitted, logged, or stored — you can verify with the network tab. The risk with online generators is sites that log inputs; this one is built and documented so it physically cannot. For maximum paranoia, generate offline with a password manager's built-in generator.