Free Strong Password Generator
For the accounts that matter most — email, banking, cloud storage, domain registrars — an ordinary password isn't enough. The Strong Password Generator produces maximum-entropy passwords up to 64 characters long, or memorable multi-word passphrases that stay strong while being easier to type. Generate up to 20 at once, each with its entropy rating, so you can secure a whole batch of accounts in one sitting.
How to Use the Strong Password Generator
- Pick a mode: random characters for maximum entropy, or a memorable passphrase.
- Tune the options — length, character sets, word count, separator.
- Click Generate to create several strong passwords at once.
- Copy them individually or all at once, and save them in a password manager.
Features
Random-character mode with lengths from 12 to 64; passphrase mode with 4–10 words, separators and capitalization styles; bulk generation of up to 20 passwords; per-password entropy ratings; ambiguous-character exclusion; individual copy buttons.
Benefits & Use Cases
Ideal for securing high-value accounts, creating credentials for family members, provisioning test users, or generating secrets for self-hosted services. Passphrase mode is handy when a password must occasionally be typed by hand, such as a disk-encryption passphrase.
Tips
For master passwords you must remember, a 6-word passphrase is a good balance of strength and memorability. For everything else, use the longest random password the site allows and store it in a password manager. Enable two-factor authentication wherever it is offered.
Frequently Asked Questions
What makes this different from the regular password generator?
It defaults to longer lengths, supports bulk generation of up to 20 passwords at once, and adds a passphrase mode for memorable-but-strong credentials.
Are passphrases really secure?
Yes, when they are long and random. A 6-word passphrase drawn from a large word list carries roughly 78 bits of entropy — far beyond brute force — while being easier to type correctly.
How many passwords can I generate at once?
Up to 20 per click. Each is generated independently with fresh cryptographic randomness, and every one shows its own entropy rating.
Can I use these for production systems?
Yes. The randomness comes from your device's cryptographic generator, suitable for real credentials. Store them in a password manager and never share them.
Why exclude ambiguous characters by default?
To prevent transcription errors. Similar-looking characters like 0/O and 1/l cause mistakes when passwords are read aloud or copied by hand.
Related Tools
Password Generator
Generate strong, random passwords free with NToolHub. Set length and character sets, check entropy live — everything runs 100% in your browser.
Open tool →Password Strength Checker
Test your password strength free with NToolHub. Entropy scoring, common-password detection and crack-time estimates — analyzed 100% in your browser.
Open tool →Bcrypt Hash Generator
Hash passwords with bcrypt free with NToolHub. Adjustable cost factor, plus password verification against hashes — 100% in your browser, nothing uploaded.
Open tool →Secure Token Generator
Generate secure random tokens free with NToolHub. API keys and session IDs in hex, Base64 or URL-safe form — 100% in your browser, nothing uploaded.
Open tool →Random String Generator
Generate random strings free with NToolHub. Custom charsets, hex mode and bulk output with secure randomness — 100% in your browser, nothing uploaded.
Open tool →