Password Generator Online Free — Strong Random Passwords
Generate strong random passwords online for free with ToolHub. Set length and character sets, exclude look-alikes, and check entropy, all in your browser.
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Password Generator Online Free — Strong Random Passwords
People are bad at inventing passwords. We reuse them, add a 1! at the end, and pick words that mean something to us — which is exactly what makes them guessable.
ToolHub's password generator creates random passwords with your browser's cryptographic random number generator, so there is no pattern to guess.
Generate one now: ToolHub Password Generator.
What You Can Control
- Length from 4 to 128 characters
- Batch size from 1 to 20 passwords at once
- Character sets: lowercase, uppercase, numbers, symbols, and extended symbols
- Your own characters to add, and characters to exclude
- Exclude look-alikes such as
Oand0orland1, and ambiguous symbols - Require every selected set to appear at least once
- Prefix, suffix, and grouping, for example
xxxx-xxxx-xxxx
Each password shows its entropy and a strength rating, with suggestions when a setting weakens it.
How Strong Is Strong Enough?
Strength comes from how many passwords the settings could produce. Entropy measures that in bits: every extra bit doubles the number of guesses an attacker needs.
| Entropy | Rating |
|---|---|
| Under 40 bits | Weak |
| 40–59 bits | Fair |
| 60–79 bits | Strong |
| 80–109 bits | Very strong |
| 110 bits and up | Excellent |
With the default settings, a 16-character password lands in the very strong range. Length helps more than anything else: adding characters raises entropy faster than adding symbol types.
How to Generate a Password
- Open the password generator.
- Set the length and choose the character sets the site accepts.
- Turn on grouping or a prefix if you need a specific format.
- Generate, then copy the password — or the whole batch.
Store it in a password manager. A strong password you cannot remember should live there, not in a notes file.
Private by Design
Passwords are generated in your browser tab with the Web Crypto API. They are never sent to a server, and they are not saved — only your settings are kept in your browser for next time.
A share link carries the settings, not the passwords, so you can give a team the same rules without passing credentials around.
Related Tools
- UUID Generator — random identifiers for systems rather than people
- Random Number Generator — ranges, uniqueness, and seeds
- QR Code Generator — share Wi-Fi credentials without typing them
Pick the rules. Generate. Store it somewhere safe.