Create strong random passwords with full control over length and characters — generated locally, never transmitted.
A strong password is long, random and unique. Length matters more than cleverness: every extra character multiplies the number of combinations an attacker must try, which is why a random 16-character password is enormously harder to crack than a "complex" 8-character one. This generator lets you set the length and the character sets, and shows a strength estimate based on the size of the search space.
The randomness comes from the browser's crypto.getRandomValues, the same cryptographically secure generator used for encryption keys — not from Math.random, which is predictable and unsuitable for secrets. Generation happens entirely on your device: the password never travels over the network, is never logged and is never stored by this page.
The "exclude ambiguous characters" option removes symbols that are easy to confuse when read or typed by hand, such as the letter O and the digit 0, or the lowercase l and the digit 1. Use it for passwords that someone may need to transcribe; leave it off for passwords that live only in a manager, where every extra character helps.
Strength is estimated from entropy: length × log2(alphabet size). With 26 lowercase + 26 uppercase + 10 digits + 28 symbols, each character adds about 6.5 bits; 80+ bits is considered strong for online accounts.
No. It is generated by JavaScript on your device using the browser's cryptographic generator, and it never leaves the page. You can disconnect from the internet and the tool keeps working.
Length and true randomness. Prefer 16 or more characters with several character sets. Avoid words, dates and patterns — attackers try those first.
Yes, when the service accepts them: they enlarge the alphabet and increase entropy. If a site rejects some symbols, generate again with symbols off and add a few characters of length to compensate.
In a password manager. Reusing one password across services is the biggest practical risk — a leak in one place exposes all of them.
Only when a human needs to read or type the password. Characters like 0/O and 1/l cause transcription errors; excluding them slightly reduces entropy but avoids lockouts.
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Vai.la is not responsible for how the tools are used or for decisions made based on their results.