Random Strong Password Generator

What makes a strong password?

A strong password is unique to one account, long enough for the account risk, and generated by a process that does not rely on human patterns. People tend to choose names, dates, familiar phrases and predictable substitutions. Password guessing tools are built to try those choices before random combinations.

For most accounts, the practical approach is to generate a random password and store it in a reputable password manager. Uniqueness matters because a perfect-looking password still fails if the same credential appears in another service breach. Add multifactor authentication or a passkey when the account offers it.

How long should a password be?

There is no universal length that fits every service. NIST requires password verifiers to accept at least 64 characters and sets a 15-character minimum for passwords used as a single authentication factor. Google recommends at least 12 characters for a Google Account. A generated password of 16 to 20 characters is a useful practical default when the service accepts it, while high-value credentials can be longer.

Length does not rescue reuse or predictable construction. A long quotation, keyboard walk or repeated word can be easier to guess than a shorter uniformly random value. See the password length guide for risk-based examples.

Random password or passphrase?

A random password packs a large search space into relatively few characters and works well when software will store and fill it. A random passphrase uses independently selected words, making it easier to type and sometimes easier to remember. A phrase you invent yourself is not equivalent to randomly selected words.

Use the passphrase generator for a master password or another secret you must enter manually, subject to the service policy. Use the password generator for ordinary accounts managed by a vault.

Should a password contain numbers and symbols?

Numbers and symbols increase the available character pool when they are selected randomly. They also satisfy composition rules on services that require them. They do not provide a magic security bonus: appending 1! to a common word is highly predictable. Increasing length and keeping the password unique usually matters more than clever substitutions.

Choose only characters the target service accepts. Exclude ambiguous characters when a value will be read aloud or typed from paper. The generator shows the selected pool and estimated search space so the assumption is visible.

How does this generator create random passwords?

The isolated tool calls crypto.getRandomValues(), the browser Web Crypto source, and maps random integers to the selected pool with rejection sampling. Rejection sampling discards values that would create modulo bias. If every selected character group is required, the tool rejects a candidate that misses a group instead of placing one character in a predictable position.

The visible entropy estimate applies to this uniform generation process. It is not an exact score for a human-chosen password. Review the generator methodology guide for the algorithm and limits.

Can this website see my generated password?

The generator runs on secure.randomstrongpasswordgenerator.com inside a sandboxed frame. That secure origin has no analytics, advertising, cookies, local storage, telemetry or password endpoint. The main page can receive only an allowlisted action name and the frame height. It cannot read the generated password because browser same-origin rules separate the two origins.

Copying happens after your click through the browser clipboard API. The website cannot control clipboard history, device malware, browser extensions or screenshots, so use a trusted and updated device for important credentials.

How should generated passwords be stored?

Save each password in a reputable password manager as soon as you create the account. Confirm the account URL before autofill, protect the vault with a strong master credential, enable its strongest supported MFA, and keep recovery material somewhere separate. Do not send passwords through ordinary email or chat.

If a service rejects the result, adjust the generator to its documented policy rather than weakening all passwords. Never reuse the rejected value on another account. The password manager guide explains evaluation, setup, backups and recovery.

Password generator FAQ