Random Text Generator

Generate highly randomized strings for testing, keys, or security use

Length (Characters)

Character Pool

Randomized Output

One long random string, made to your length

Sometimes you just need a block of characters with no meaning: a long value to test an input field's maximum length, a filler string for a database column, or a sample token in a code example. This tool builds a single random string of the length you specify from a character pool you choose, and shows it in a box ready to copy.

How to generate

Enter a number in Length (Characters). It starts at 128.
Choose a Character Pool from the dropdown: Alphanumeric, Alphabetic Only, Numeric Only or Complex (Includes Symbols).
Click Generate Random Text.
Read the string in the Randomized Output box and press Copy.

The character pools

Alphanumeric uses upper case and lower case letters and the digits 0 to 9, even though the label mentions only A-Z and 0-9.
Alphabetic Only uses upper and lower case letters.
Numeric Only uses the digits 0 to 9.
Complex adds symbols such as ! @ # $ % ^ & * ( ) _ + - = [ ] { } | ; : , . < > ? to the alphanumeric set.

Good to know about randomness

Characters are chosen with the browser's standard Math.random function. That is fine for filler, mock data and layout tests, but it is not a cryptographically secure source, so do not use this page to create passwords, API secrets or encryption keys. The site's Random String Generator uses a stronger random source and lets you choose your own character set, and a password manager is better still for real credentials. This tool creates just one string per click and has no download button, only Copy.

Everyday uses

Testing how a form field or database column handles 128, 255 or 1000 characters.
Creating a long unbroken string to check that a layout wraps or truncates it properly.
Making a numeric-only sequence to test number formatting or validation.
Producing symbol-heavy input to see whether escaping and encoding behave.

Tips

Use a whole number above zero for the length. An empty or invalid value produces an empty string.
Choose Complex when you specifically want to test special characters, such as quotes or angle brackets in HTML or SQL contexts.
Very long strings are displayed with word breaks so they wrap inside the box; copying keeps the text as one line.

The string is produced in your browser by JavaScript and appears immediately.

Related Tools

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Frequently Asked Questions

Is this safe for generating passwords?

No. This page uses Math.random, which is not a cryptographically secure source. It suits filler text and testing. For secrets, use the Random String Generator, which relies on the browser's cryptographic generator, or a password manager.

Why does Alphanumeric include lowercase letters?

The dropdown label says A-Z and 0-9, but the pool also contains lowercase letters a-z. So Alphanumeric means upper case, lower case and digits, while Alphabetic Only means upper and lower case letters.

Which symbols does the Complex option add?

It adds characters like ! @ # $ % ^ & * ( ) _ + - = [ ] { } | ; : , . < > ? to the alphanumeric set of letters and digits. This helps when testing how systems handle special characters, quoting and escaping.

Can I generate several strings at once?

Not on this page. Each click creates one string of the length you set. Click again for a new one, or use the Random String Generator if you need many strings, custom characters and a download option.

What length should I use for testing limits?

Match the limit you are testing, for example 255 for a typical varchar column or 1000 for a text field, then try one character more. The generator builds exactly the number of characters you enter.