Online Tool Store
Passphrase Generator
Generate multi-word passphrases with adjustable word count, separators, optional numbers, and an entropy estimate.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
How the passphrase generator works
- Set how many words you want, a separator, and whether to add a number or capitalize words.
- The tool randomly picks that many words from a curated word list.
- Press Generate new for a fresh passphrase anytime, and copy it with one click.
The method
entropy (bits) = log2(word list size) × word count + log2(100) if a number is added
FAQ
Why is a passphrase better than a short complex password?
A random passphrase of several unrelated words has far more entropy (possible combinations) than a short password, while staying much easier to remember and type than a jumble of symbols.
How is randomness generated?
Each word is chosen using JavaScript's standard random number generator to pick uniformly from the word list, and the words are combined with your chosen separator and options.
What does "bits of entropy" mean?
It measures how many guesses an attacker would need on average to find your passphrase by brute force - higher is stronger. Adding more words or a number increases it substantially.
Is my generated passphrase sent anywhere?
No. Every passphrase is generated locally in your browser and never leaves the page.
How we compare
| Feature | Online Tool Store | Random symbol password generators | Password manager built-in generator |
|---|---|---|---|
| Easy to remember and type | ✓ | ✗ | Varies |
| No account or install | ✓ | ✓ | ✗ |
| Entropy estimate shown | ✓ | ✗ | Varies |
For a strong passphrase you can actually type without a manager, Passphrase Generator strikes a practical balance.