Random Number & String Generator

About Random Number & String Generator

This versatile tool allows you to generate random numbers (integers or decimals within a specified range) and random strings with a high degree of customization. It's perfect for creating test data, generating passwords, unique identifiers, or any scenario where random data is needed.

How to Use This Tool

• Select Type: Choose whether you want to generate "Random Strings" or "Random Numbers".
• Quantity: Specify how many random items you need.
• Separator: Choose how multiple generated items should be separated in the output list.
• Click the "Generate" button.
• The generated items will appear in the output area below.
• You can then copy the list or download it as a .txt or .csv file.

For Random Numbers:

• Min/Max Value: Define the range for your random numbers.
• Decimal Places: Set to 0 for integers, or specify the number of decimal places for floating-point numbers.
• Allow Negatives: Check if you want negative numbers to be included in the generation.
• Unique Numbers: Check to attempt generating unique numbers. Be cautious with small ranges and large quantities as it may be slow or impossible.

For Random Strings:

• String Length: Define the length of each random string.
• Character Sets: Select which character types to include (lowercase, uppercase, numbers, special characters).
• Custom Characters: Provide your own set of characters to be used for generation.
• Prefix/Suffix: Add text to the beginning or end of each generated string.

Frequently Asked Questions

How "random" are the generated items?

This tool uses the browser's built-in pseudo-random number generator (Math.random()). While it's suitable for most general-purpose applications, it is not cryptographically secure and should not be used for generating sensitive data like secure passwords or cryptographic keys that require a higher degree of unpredictability.

Can I generate very large quantities or very long strings?

There are practical limits on quantity (e.g., 50,000 items) and string length (e.g., 1024 characters) to prevent browser performance issues. If you request an extremely large output, the tool may become slow or unresponsive, and an error message might be displayed.

What happens if I request unique numbers from a very small range?

If you check "Unique Numbers Only" and the requested quantity is larger than the number of possible unique values in the specified min/max range (especially for integers), the tool will try its best but may eventually throw an error if it cannot find enough unique numbers after a reasonable number of attempts. It's best used when the range is significantly larger than the quantity needed.

Is my data processed on a server?

No. All random number and string generation happens locally in your web browser using JavaScript. Your settings and the generated data are not sent to any external server.