Free online password generator. Set a length from 4 to 128, turn uppercase, lowercase, numbers and symbols on or off, then copy a strong password. No sign-up.
Security tools by OnlinePCApps since 2013
A password a person invents follows a pattern an attacker can guess. The free online password generator makes one from true randomness, strong by the numbers rather than by feel.
A password thought up by a person leans on names, dates and common swaps that a cracker tries first. Drawing every character from a cryptographic random source removes that pattern, so the online password generator gives strength that is real rather than a guess.
A throwaway forum login and a bank account do not need the same strength. Set a short length for a low-stakes sign-up and 24 or more for an account that holds money or mail, then turn on all four character sets in the online password generator to reach the Strong label.
Open the online password generator, leave the start values and select Generate Password. The result is 16 characters of uppercase, lowercase and numbers, ready to copy. No account, no install and no setup stand between the page and a new password.
Move the slider or type a number from 4 to 128 in the length field of the online password generator. It starts at 16. The buttons 8, 12, 16, 24, 32 and 64 jump to a common length. A longer password is a stronger one.
Turn Uppercase, Lowercase, Numbers and Symbols on or off. The first three start on and Symbols starts off. At least one set must stay on, or a note asks for a selection.
Select Generate Password in the online password generator. The result shows in the box with a Weak, Good or Strong label and a bar. Select Copy to put it on the clipboard. Reset returns the length and the sets to their start values.
To generate a password is to draw random characters into a strong secret. The online password generator does that from a length and four toggles.
The slider and the number field of the online password generator take 4 to 128 characters and start at 16. The buttons 8, 12, 16, 24, 32 and 64 jump to a common length. Length counts for as much as the character mix.
Uppercase, Lowercase, Numbers and Symbols are four toggles. The first three start on and Symbols starts off. With all four off, a note asks for a selection and Generate Password stays disabled.
After the online password generator makes a password, a label and a bar show Weak, Good or Strong. The label counts a length of 12 and of 16, mixed case, numbers and symbols. Strong needs 16 characters or more with all four sets on.
Copy puts the password on the clipboard and shows Copied for two seconds. Reset sets the length back to 16, restores the start toggles and clears the box.
To generate a password, to make a strong random one and to create a secure login all name one job. A search for password generator or strong password lands on the online password generator above.
A strong password comes down to randomness and length. The cases below show what the online password generator sets and what it leaves out.
| The case | Result | What happens and why |
|---|---|---|
| Length | 4 to 128 | A slider and a number field in the online password generator that start at 16, with buttons for 8, 12, 16, 24, 32 and 64. |
| Uppercase | A to Z | A toggle that starts on. It adds capital letters to the pool. |
| Lowercase | a to z | A toggle that starts on. It adds small letters to the pool. |
| Numbers | 0 to 9 | A toggle that starts on. It adds digits to the pool. |
| Symbols | off at start | A toggle that adds marks like ! @ # and $. Turn it on for a stronger result. |
| Strength label | Weak, Good, Strong | A label and a bar show after a password is generated. |
| Strong | 16 plus all four | Strong needs 16 characters or more with all four sets on. |
| Copy | Copied | One click puts the password on the clipboard and the button shows Copied. |
| Reset | start values | Length goes back to 16 and the toggles go back to their start state. |
| Passphrase | not offered | The page makes one string of random characters. For words, roll dice against the EFF list. |
| Look-alike characters | not a setting | No switch removes O and zero. Check the result by eye when it will be read aloud. |
| Entropy in bits | not shown | Only the label shows. Work it out by hand as length times the base-two log of the pool. |
| Several at once | one at a time | Every press of Generate Password makes one password and replaces the last. |
| Storage | a manager | Save what the online password generator makes in a password manager and never reuse it across accounts. |
| Where it runs | on the device | The password is generated in the browser, so nothing is uploaded. |
How a Strong Password Is Made
The strength of a password rests on two things, and neither is the trick a person reaches for. The first is real randomness. A generator worth using draws every character from a cryptographically secure random source rather than Math.random, which is predictable and unfit for a secret. The second is entropy, the number of bits that measures how hard a password is to guess, worked out as the length times the base-two log of the character pool. This is why length carries so much weight. Adding one character to a password buys about as much entropy as switching to a much larger set of symbols, and two extra characters buys more. A useful floor is eighty bits, with a hundred and twenty-eight very strong, and there is little point pushing far past that, since other risks like phishing take over. Modern guidance from NIST agrees, having dropped forced symbols and forced periodic changes in favor of length and randomness. A passphrase of several random words is the friendly form of the same idea, since every word from the EFF list adds close to thirteen bits. The online password generator above builds a character string with a Weak, Good or Strong label, and the references below set out the details.
Both make a strong password. The split is a quick one-off against a tool that also stores it.
| Point of comparison | This tool Online password generator On the device | A password manager A separate stored vault |
|---|---|---|
| Where it is made | In the browser | On the device too |
| Price and caps | Free with no sign-up | Free tier often capped |
| Stores and fills it | Copy it out by hand | Saves and autofills it |
| Sync across devices | This one page only | Shared across a vault |
| A quick one-off | Open and generate, no account | Set-up and a vault first |
A password manager is the right home for passwords used every day, since it stores, fills and syncs them across a vault. The online password generator is for a quick strong password with no account, and a manager is where to keep it. Online file tools and whether yours uploads covers where a web tool sends its input.
Every password is built inside the browser by its own secure random generator, so the work is client-side and the result stays on the machine that made it. Nothing is passed to a server, which is the entire point of generating a secret this way.
A password only stays secret if it is never sent anywhere, so a generator that made one on a server would defeat itself the moment it did. Here the secret is created and shown on the device, and it lives only where it is copied and saved afterward.
All of these make a password. They differ from the online password generator in reach, in storage and in how random the result is.
A manager, the browser, code and dice all make a password, yet every one means an account, a script or a slow roll. The online password generator makes a strong one in a click, with a strength label and no set-up.
A little context gives a safer password.
A longer password is stronger than a short one loaded with symbols, and adding a character helps about as much as widening the pool. Reach for length first in the online password generator, which is the change modern guidance now leans on.
A password reused across sites turns one breach into many. Give every account its own password from the online password generator and keep them in a password manager, so a leak on one site cannot open the rest.
A random 16 character password is not one to memorize, so save it in a password manager right after copying. For the one master password a person has to recall, a passphrase of several random words is easier to remember, and it comes from a separate source like dice and the EFF list.
The online password generator makes a strong one-off password, which suits a quick need. A password used and filled on every login, or an entire set of accounts, belongs in a password manager, which generates, stores and syncs every one and fills it where it is needed.
A manager saves every generated password and fills it on the right site, so a unique password per account is no burden to use.
A vault syncs, so a password made on one device is there on a phone or a laptop, filled the same way everywhere.
A manager can flag a reused or a leaked password, so a weak one is caught and replaced before it is a way in.
No sign-up needed. Open the online password generator, set the length and select Generate Password.