Security Tool
Password Generator
Strong, random passwords — generated in your browser, never sent anywhere. Set length, character sets, exclude ambiguous chars, or switch to an easy-to-type passphrase.
—Very Strong · 129 bits of entropy
Bulk generate
🔒 Generated entirely in your browser using crypto.getRandomValues() — nothing is sent anywhere. Disconnect from the internet and it still works.
When to use each mode
Random password — for vaults & services
High-entropy character strings are ideal for any account managed by your password manager. You never type them manually, so readability doesn't matter — only strength does.
Passphrase — for things you type by hand
Wi-Fi passwords, disk encryption, SSH passphrases, or your password manager master password. Four random words are easier to remember and type than 20 random characters, and equally strong.
Bulk generate — for teams & batch imports
Generate 5–50 unique passwords at once for employee onboarding, seeding a test database, or creating service account credentials in bulk. Copy as a newline-separated list.
Exclude ambiguous — for visual entry
When a password must be typed from a printed sheet or read aloud (TV remote entry, router admin, device setup), removing 0/O/1/l/I eliminates transcription errors without meaningfully reducing security.
Frequently asked questions
Is this password generator safe to use?
Yes. Every password is generated directly in your browser using the Web Cryptography API (crypto.getRandomValues()), which is the same source of randomness used by password managers. Nothing is sent to a server — you can disconnect from the internet and the tool still works.
How long should my password be?
For online accounts, 16 characters with a mix of upper/lower/digits/symbols gives ~100 bits of entropy — far beyond what any attack can crack today. For high-value accounts (email, banking) go to 20+. For passphrases, 5 words from a large word list gives ~50 bits, which is also strong.
What is a passphrase and when should I use one?
A passphrase is a sequence of random words, like 'Amber-Lake-Forge-Stone'. It's easier to type and remember than a random character string, and it's equally secure when you use enough words. Great for Wi-Fi passwords, disk encryption, and anything you need to type manually.
Why exclude ambiguous characters like 0, O, 1, l, I?
These characters look identical or very similar in many fonts. If you ever need to read or transcribe a password visually (for example, entering it on a TV or smart device), ambiguous characters cause errors. Enabling "exclude ambiguous" removes them from the pool without meaningfully reducing security.
What is entropy and how much do I need?
Entropy (measured in bits) describes how unpredictable a password is. 40 bits means an attacker would need to try 2^40 (~1 trillion) guesses. Modern password crackers can test billions of guesses per second, so 60+ bits is recommended for offline-attack targets and 40+ bits is fine for online accounts with lockouts.
Can I bulk-generate passwords for a team or batch import?
Yes. In Password mode, use the Bulk generate section to create 5, 10, 20, or 50 passwords at once with your chosen settings. Click "Copy all" to copy the list as newline-separated text for pasting into a spreadsheet or secrets manager.
Does this tool store or log my passwords?
No. There is no server, no database, and no logging. The password exists only in your browser's memory and disappears when you close the tab. Even SimpleTool's own servers cannot see what you generate.
Why use this instead of my password manager's built-in generator?
For passwords that go into a vault, your password manager's generator is fine. This tool shines when you need a password on a device where your manager is not installed, for system/service credentials that never go into a vault (database passwords, API keys, .env values), or when you need bulk generation with precise character-set control.
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