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Random Text Generator

Generate random strings from any character set you choose.

Text Tools Reviews Free · no sign-up

Quick Tool Overview

The Random Text Generator produces random strings from whatever character set you specify — letters, digits, symbols or a custom set — using the browser's cryptographic random source. Ambiguous characters can be excluded in one click, which matters for any code a person has to read and retype.

What it does
Generates random strings to your specification
You give it
A character set, a length and a count
You get back
As many random strings as you asked for
Best for
Test fixtures, coupon codes and unique identifiers
Text Tools Free, unlimited use No sign-up Runs in your browser

About the Random Text Generator

Random strings are needed constantly and almost never in the same shape twice. A test fixture wants twenty alphanumeric characters. A coupon code wants eight uppercase letters with no O or I in them. A file suffix wants six lowercase hex digits. A stress test wants a thousand strings at once.

This generates them from whatever character set you specify: letters in either case, digits, symbols, or a custom set you type. Ambiguous characters — 0 and O, 1 and l and I — can be excluded in one click, which matters for anything a human will read aloud or type from a printout. Generation uses the browser's cryptographic random source where it is available, so the output is genuinely unpredictable rather than merely varied.

Key features of the Random Text Generator

Cryptographic randomness

Uses crypto.getRandomValues where available, so the output is genuinely unpredictable rather than merely varied.

Ambiguous characters excluded

Drop 0, O, 1, l and I in one click for anything read from a screen or a printout.

Custom character sets

Type your own alphabet when the format is fixed by something other than convenience.

Bulk generation

Up to ten thousand strings at once, with duplicate detection so you can confirm the set is unique.

Entropy shown

The bits of entropy per string, so you can judge whether the length is actually enough.

How to use the Random Text Generator

  1. 1

    Choose the character set

    Uppercase, lowercase, digits and symbols are each a switch, or type your own set.

  2. 2

    Set the length and count

    How long each string should be, and how many you need.

  3. 3

    Exclude ambiguous characters

    Drop 0, O, 1, l and I when a person has to read or retype the result.

  4. 4

    Generate and copy

    Press generate for a fresh set; every string is new each time.

Frequently asked questions

It uses crypto.getRandomValues where the browser provides it, which is a cryptographically secure source. For production secrets, generate them on the server in the environment they will be used — a value that has passed through a browser page should be treated as exposed.

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