Web Tools · Free · No signup

Generate Strong, Random Passwords Offline

Passwords are only as strong as their randomness — this generator uses your browser's cryptographic random number generator (crypto.getRandomValues), not a math formula a cracking tool could guess. Pick a length, choose which character sets to include, optionally exclude look-alike characters (I, l, 1, O, 0) for passwords you will read off a screen, and generate one or a batch of ten. A live strength meter shows the estimated entropy in bits. Nothing is transmitted, logged or stored — the password exists only in your tab until you copy it.

Entropy shown after generating

Length 16Quantity

🔒 100% private: everything runs inside your browser — nothing is uploaded, stored or logged.

How it works

Set the length (16+ recommended) and choose the character sets to include.
Optional: exclude look-alike characters (I l 1 O 0) if you will type or read the password by hand.
Press Generate — one password, or a batch of 5/10 with the same rules.
Copy the password into your password manager — the strength meter shows the bits of entropy.

Features

Cryptographic randomness

Built on crypto.getRandomValues with unbiased rejection sampling — the same class of randomness used for session tokens.

Any combination of sets

Uppercase, lowercase, digits and symbols — require each set so complexity rules are always satisfied.

Look-alike exclusion

Remove I, l, 1, O, 0 (and more) for passwords that stay readable on phones and paper.

Batch generation

Ten passwords per click for onboarding lists, Wi-Fi networks or team accounts.

Live strength estimate

Entropy in bits, from weak (< 40) to military-grade (100+), computed from length and charset size.

100% offline

Generated in your browser with zero network access. No password ever touches a server, log or analytics script.

Input & output. Input: length (8–64), charset checkboxes, quantity. Output: one or more passwords as plain text — copy them straight into a password manager. Nothing is saved or transmitted.

Common use cases

Creating unique passwords for every account instead of reusing one.
Generating strong Wi-Fi keys (WPA2/WPA3 pre-shared keys) for home or office networks.
Producing initial credentials for onboarding, then forcing a change at first login.
Making admin and service-account passwords that meet strict complexity policies.

Limitations (honest ones)

Entropy estimates assume the password is truly random — reusing it across sites, emailing it, or shortening it destroys that strength regardless of what the meter says. A random password is hard to memorize by design: store it in a password manager, not on a sticky note. The generator cannot check if a password has already been leaked in a breach — a manager with breach monitoring adds that layer.

Frequently asked questions

How long should a password be?

16 characters with all four sets (~100 bits) is a strong default for accounts; 12 is the practical minimum; 20+ for Wi-Fi keys, master passwords and anything guarding money. Length beats complexity: a long password with three sets outperforms a short one with four.

Is this generator really random?

It uses crypto.getRandomValues — your browser's cryptographic RNG — with rejection sampling to avoid modulo bias. This is the same source browsers use for session keys. The code runs locally and can be audited in page source.

Can anyone see the passwords I generate?

No. Generation happens in your tab; there is no server component, no logging, no analytics on the values. If you are paranoid (good), load the page, go offline, and generate.

Why exclude look-alike characters?

I, l, 1 and O, 0 are routinely confused when a password is read from a screen, printed or dictated. Excluding them costs a little entropy but removes most human transcription errors — worth it for Wi-Fi keys and onboarding.

Should I use a passphrase instead?

For things you must remember, yes: a 5–6 word random passphrase is memorable and strong. This tool makes character passwords; use a passphrase generator or diceware for memorable secrets — or memorize only your password-manager master passphrase.

Keep going

Related tools

Base64 Converter

Encode or decode Base64 text with full Unicode and URL-safe support.

Use Tool →

JSON Formatter

Format, validate and minify JSON with clear error locations.

Use Tool →

Lorem Ipsum Generator

Generate lorem ipsum placeholder text by paragraphs, sentences or words.

Use Tool →

URL Encoder

Encode or decode URLs and query components with proper percent-encoding.

Use Tool →

Slug Generator

Turn titles into clean, SEO-friendly URL slugs — batch mode included.

Use Tool →

On mobile?

Working from your phone?

This tool runs in any mobile browser — no app needed. And for the image & PDF side of the toolbox, the CompressoPanda Android app ships 36 tools that run with no connection at all: compression to target size, editing and PDF essentials included.

Explore the Android App Google Play ↗