What is this password generator for?
A strong password is the first line of defence between your online accounts and attackers. The most common attacks do not involve guessing passwords at random: they replay lists of passwords leaked from data breaches, or automatically test millions of short combinations within minutes. A long, random and unique password makes both methods ineffective, because it appears in no leaked list and the number of possible combinations becomes too large to search.
This generator creates a completely random string from the character sets you allow. You choose the length with the slider, then tick the character families to include: lowercase, uppercase, numbers and symbols. The strength indicator updates instantly, combining length and character variety to tell you whether the result is weak, medium or strong. The Generate button produces a new suggestion as many times as you need, and the Copy button places the password on your clipboard so you can paste it straight into the service's registration form.
How long should a password be?
Length is the most important factor. In practice, 12 characters is the minimum acceptable for an ordinary account, 16 characters is a good standard for email or social media, and 20 or more is justified for accounts that protect everything else: your primary email, your bank, your password manager or a website admin panel. Enabling all four character families widens the alphabet used and further increases the number of possible combinations at any given length.
Some services still reject symbols or limit allowed length. In that case, untick symbols rather than shortening the password dramatically: increasing length more than compensates for the loss of variety. Conversely, if you must type a password manually on a TV or console, a long password made only of letters and numbers is still much safer than a short password packed with symbols.
Best practices to remember
Never reuse a password. If a site you use suffers a breach, the recovered credentials are immediately tested on every other known service: this is called credential stuffing. A unique password per account limits the damage to a single service.
Because it is impossible to memorise dozens of random strings, use a password manager: it stores them encrypted and fills them automatically, leaving you with only one master passphrase to remember. Also enable two-factor authentication wherever it is offered: even if a password is stolen, it is no longer enough to log in. Finally, do not change passwords 'by habit' every three months — change them immediately after a confirmed breach or if you suspect a device is compromised.
Frequently asked questions
Are generated passwords stored anywhere?
No. Generation happens entirely inside your browser, using the browser's native cryptographic API. No password is sent to a server, logged or stored by ToolNova. Close the tab and the displayed password disappears permanently.
Is the randomness truly unpredictable?
Yes. The tool uses crypto.getRandomValues(), the cryptographically secure random number generator provided by the browser, not predictable Math.random(). It is the same source of randomness used to generate secure session keys.
What password length is considered secure in 2026?
Count at least 12 random characters, 16 for ordinary use and 20 or more for your most sensitive accounts. A random 16-character password mixing all four character families is beyond the reach of brute-force attacks with current computing power.
Is a passphrase or a random password better?
Both are valid depending on the use case. A passphrase of several unrelated words is easier to remember: reserve it for the few passwords you must type from memory, such as your password manager. For all other accounts, a random password stored in a manager offers better resistance at the same length.
Can I reuse the same password on several unimportant sites?
It is not recommended. An 'unimportant' site may still hold your email address, and a breach there reveals a username/password pair that will be tested elsewhere automatically. Generate a distinct password for every service, even those you consider low-value.