Random String Generator

How this string generator works

You need a random string of characters, maybe for a password, a test value, a unique ID, or a one-off key. This tool builds one for you in a tap, and the page below explains how it works and how to think about using a random string as a password.

Set the Length box to the number of characters you want, anywhere from 1 to 100, and press Generate. The tool builds a fresh string of that length in your browser, drawing each character from a mix of uppercase and lowercase letters, digits, and symbols. So a length of 12 might hand you something like "K7#pQ2v!nZ4x", a jumble with no pattern to it. The Copy button puts the whole string straight on your clipboard.

What makes a strong password

If you are using this for a password, here is what actually matters, and it has changed. For years the advice was to cram in uppercase, lowercase, numbers, and symbols. The current thinking, from the US National Institute of Standards and Technology, is that length matters far more than complexity. A long password is much harder to crack than a short but fiddly one.

The latest guidance drops the old forced-complexity rules, leans on longer passwords, and points at the real danger: reuse. A password is only strong if it is unique and has not already turned up in a past data breach. So the best use of a tool like this is to generate a long, unique string for each account, rather than reusing one clever password everywhere.

Ways people use random strings

• Passwords. Generate a long, unique string for an account. Longer is stronger, so do not be shy with the length.
• Unique IDs and keys. A random string makes a quick identifier: a test API key, a coupon code, or a reference number.
• Test and placeholder data. When you are building something and need a random value to drop into a field, this saves you inventing one.
• One-off secrets. A temporary password to hand over, or a throwaway value you will use once and discard.

A note on security and privacy

A fair question with any password tool is whether it is safe to use. This one builds the string right in your browser, on your own device, drawing on the browser's cryptographic random number generator rather than the ordinary random function most scripts reach for. Nothing you generate is sent anywhere or stored.

That said, be sensible about it. For the passwords you rely on every day, a dedicated password manager is the better home, because it generates, stores, and fills them for you, so you never have to remember or paste them by hand. Use this tool for quick, one-off strings, and let a password manager handle the accounts that really matter.

Questions people ask

How long should a random string be for a password?

Longer is better. Modern guidance favours length over complexity, so aim well above the old eight-character habit, twelve to sixteen characters or more for anything that matters.

Is the string actually random?

It uses your browser’s cryptographic random number generator, the same source a password manager draws on, rather than the ordinary random function most scripts reach for. Each character is drawn independently, and nothing about one string tells you anything about the next.

Can I use this as a password?

Yes, especially for a quick one. For accounts you use daily, generating the string here and storing it in a password manager is the safer habit.

Does it include symbols and numbers?

Yes. The mix includes uppercase and lowercase letters, digits, and a range of symbols, so you get a varied string by default.

Is anything I generate saved or sent anywhere?

No. The string is built in your browser and never leaves your device.

References

1. NIST, SP 800-63B Digital Identity Guidelines
2. NIST, Strength of Passwords (SP 800-63B)