Random string generator | Generate Secure Random Strings

Create random strings with customizable characters and lengths for secure passwords, unique IDs, or testing data. Select from letters, numbers, and special characters.

What Is a Random String Generator?

A random string generator creates strings of random characters of any length, with letters, numbers and symbols you choose. It generates them on the server with PHP’s cryptographically secure random_int(), so the strings are suitable for passwords, tokens, IDs and test data.
In your browser Updated 06/2026

What Is a Random String Generator?

A random string generator creates strings of random characters of any length, with letters, numbers and symbols you choose. It generates them on the server with PHP’s cryptographically secure random_int(), so the strings are suitable for passwords, tokens, IDs and test data.

Generator Settings

Leaves out look-alike characters such as O, 0, l, 1 and |.
1 to 100 strings
1 to 1024 characters each

Generated Results

How to Use This Tool

1

Choose your character set

Select from predefined sets or enter custom characters

2

Set quantity and length

Choose how many strings and their length

3

Pick output format

Choose between single or multiple lines

4

Generate and copy

Create your strings and copy to clipboard

Key Features

Flexible Character Sets

Choose from predefined sets or create custom combinations

Multiple Output Formats

Generate strings in single or multiple line format

Secure Generation

Uses cryptographically secure random generation

Batch Generation

Create multiple strings at once

Common Use Cases

Password Generation

Create strong, random passwords for enhanced security

API Keys & Tokens

Generate secure API keys and access tokens

Test Data Creation

Create random data for testing and development

Unique Identifiers

Generate unique IDs and references

Frequently Asked Questions

Yes, the tool uses cryptographically secure random number generation. For strong passwords, select all character sets (uppercase, lowercase, numbers, and symbols) and use a length of at least 16 characters.

You can generate up to 100 strings at once, each with a maximum length of 1,000 characters. You can also choose a custom separator and output format (single line or multiple lines).

Yes, switch to the "Custom characters" mode and enter exactly the characters you want to use. The generator will only use those characters to build the random strings.