Random Password Generator
Generate secure random passwords with customizable options for length and character types.
Password Strength
None
Password Length: 12
6-30 password length
Character Types
How to use Random Password Generator
- 1
Set the length
Choose how long the password should be using the password length control.
- 2
Pick character types
Enable uppercase, lowercase, numbers, and symbols, and optionally exclude similar-looking characters like i, l, 1, O, and 0.
- 3
Generate the password
Click Generate to create a random password and watch the strength meter rate it.
- 4
Copy the password
Use Copy Password to place the generated password on your clipboard.
A Practical Guide to Strong Passwords
Why length beats complexity
The single most important property of a password is its length. A password's resistance to guessing is measured in bits of entropy, and every character you add multiplies the number of possibilities an attacker must try. A 16-character password drawn from a large character set has far more entropy than an 8-character one bristling with symbols, because doubling the length squares the search space rather than just widening it.
This is why a longer password using only lowercase letters can be stronger than a short one that mixes uppercase, digits, and punctuation. When you set the length control on this tool, treat 16 characters as a sensible floor for important accounts and push toward 20 or more for anything that protects email, banking, or a password vault.
How entropy is estimated
Entropy in bits is roughly the password length multiplied by the base-2 logarithm of the pool size. With lowercase only the pool is 26, so each character contributes about 4.7 bits; add uppercase and the pool becomes 52 (about 5.7 bits each); enable all four sets and the pool jumps to roughly 94 printable characters, worth about 6.55 bits per character. A 16-character all-sets password therefore carries around 104 bits, comfortably beyond brute-force reach.
The strength meter on this page reflects the same idea: it rises as you increase length and as you enable more of the uppercase, lowercase, numbers, and symbols sets. Excluding similar characters slightly shrinks the pool, but the security cost is negligible compared with the readability you gain.
Why client-side generation is safe
This generator runs entirely in your browser using JavaScript. Nothing you produce is sent over the network, logged, or stored on a server, so the password exists only on your device until you copy it. That is a meaningful security advantage over sites that generate secrets remotely, where the value travels across a connection you cannot fully audit.
Because the work happens locally, you can even disconnect from the internet before generating a critical password and reconnect afterward. The only place your new password should travel is straight into the account it protects and into your password manager.
When to exclude similar characters
The Exclude Similar Characters option removes the glyphs that are easy to confuse: lowercase i and L, the digit 1, uppercase L, lowercase o, the digit 0, and uppercase O. Enable it whenever a human will have to read, dictate, or retype the password, such as a Wi-Fi key taped to a router or a temporary credential read aloud over a call.
Leave it off when the password goes directly into a manager and is never typed by hand. Keeping the full character set maximizes entropy, and a tool that autofills the value will never misread a 1 as an l.
Passphrases versus random passwords
A random password like x7Q!mP2vR9wL is dense but hard to remember. A passphrase strings together several unrelated words, such as anchor-velvet-quartz-meadow, and reaches similar entropy through length while staying memorable. The trick is that the words must be chosen randomly, not picked by you, because human-chosen word sequences are far more predictable.
Use a random password from this tool for the handful of credentials you must memorize, such as your password manager's master entry, and let the manager store long random strings for everything else. You get memorability where you need it and maximum strength everywhere else.
Use a password manager
The hardest part of good password hygiene is not creating strong passwords but remembering dozens of them. A password manager solves this by storing a unique, generated password for every account behind one strong master password. You then only have to remember that single master secret, which is the ideal use for a long passphrase.
Generate each new credential here, paste it into the manager as you create the account, and never reuse it. A manager also flags duplicates and warns you when a stored site has appeared in a known breach, turning password security from a chore into a background process.
Common mistakes to avoid
The most damaging habit is reusing one password across multiple sites: a single breach then unlocks every account that shares it, an attack known as credential stuffing. Equally risky are passwords built from dictionary words, names, birthdays, or keyboard patterns like qwerty and 123456, all of which appear in the wordlists attackers try first.
Predictable substitutions such as P@ssw0rd fool no one, because cracking software expands them automatically. Avoid these by letting the generator do the choosing, keeping every password unique, and resisting the urge to tweak a memorable base phrase across accounts.
Add a second layer with 2FA
Even a perfect password is only one factor. Turning on two-factor authentication, ideally through an authenticator app or a hardware security key rather than SMS, means a stolen password alone is not enough to log in. The two defenses complement each other: the password proves something you know, and the second factor proves something you have.
Pair a long, unique, randomly generated password from this tool with 2FA on every account that offers it, and you close off the overwhelming majority of real-world account takeovers.
Frequently asked questions
What character types can I include in the password?
What does 'exclude similar characters' do?
How is the password strength rated?
Are the generated passwords safe to use?
Is this password generator free?
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