Random Generator

What is a random generation tool?

The Random Generator is a free tool that allows you to generate numbers within a specified range, strings of any length, random selections from a list of candidates, random colors, and the results of dice rolls or coin flips—all on a single screen.It can be used for a wide range of purposes, from everyday tasks to development work—such as determining the order of events, selecting candidates for team assignments, creating test data, generating random numbers for games or learning, and coming up with color schemes for designs. By switching the generation type at the top of the screen, only the input fields necessary for that specific use are displayed, resulting in a versatile yet intuitive layout that’s easy to navigate.

When generating numbers, you can specify the minimum and maximum values, the number of values to generate, and the number of decimal places. This feature supports everything from random integer numbers to test values containing decimals, and you can prevent duplicates as needed.For string generation, you can freely combine lowercase letters, uppercase letters, numbers, and symbols, and specify the character count and number of strings to generate. Since you can add custom characters or exclude characters that are easily confused—such as 0 and O, or 1 and l—this feature is also useful for creating identification codes and temporary test values.

In the list lottery, paste names, products, options, etc., one item per line, and randomly select the specified number of items. By using the "Do not allow duplicates" setting, you can ensure that the same item is not selected twice.The random color feature supports HEX, RGB, and HSL formats and displays both color swatches and values simultaneously. You can select dice ranging from 4 to 100 sides and view multiple roll results and their totals. You can also perform as many coin tosses as needed on the same screen.

To generate random numbers, this tool uses the Web Crypto API in supported browsers. While this method generates values that are harder to predict than those generated solely by the standard `Math.random` function, the results of this tool do not guarantee the legal fairness of lotteries, raffles, gambling, or cryptographic key management. For critical lotteries, please use third-party witnesses, maintain records, and employ dedicated, auditable mechanisms in conjunction with this tool.All input and generation processes take place within the user’s browser; candidate lists and generation conditions are not sent to the server for calculation.

Available Features

• Generate random numbers within a specified range, with a specified number of items, and a specified number of decimal places
• Generating unique numbers
• Generate random strings with specified character types and lengths
• Select one or more items at random from a list of options
• Generate random colors in HEX, RGB, and HSL formats
• D4, D6, D8, D10, D12, D20, and D100 dice
• Multiple coin tosses
• Bulk Copy Results and Save Text

How to Use

1. From "Generate," select one of the following: a number, a string, a list, a random selection, a color, or a die roll.
2. Use the displayed input fields to specify conditions such as range, number of items, character type, and suggestions.
3. When you click "Generate," the screen will automatically scroll to the results section at the bottom of the page to display the results.
4. If you regenerate the output using the same criteria, the result will generally be different.
5. Use "Copy All" or "Save Text" as needed.

Precautions for Use

• When generating unique numbers, you cannot generate more values than the number of values that exist within the specified range.
• In list-based selection, blank lines are not treated as options. Remove leading and trailing spaces from options.
• While random strings can be useful as test values, please use dedicated password generation and management methods for critical authentication credentials intended for long-term use.
• This tool does not guarantee the fairness or auditability of results for legally or financially significant lotteries or gambling applications.

Frequently Asked Questions

Can I specify a range for the random number?

Yes. You can specify minimum and maximum values and generate numbers within that range.

Can you generate unique numbers?

Yes. Please select “Do not duplicate the same values.” However, if the number of generated options exceeds the specified range, they cannot be generated.

Can you generate random decimal numbers?

Yes. You can specify the number of decimal places from 0 to 12.

Can random strings include symbols?

Yes. You can freely combine lowercase letters, uppercase letters, numbers, and symbols. You can also add custom characters.

Can you remove any confusing characters?

Yes. There is a setting to exclude characters such as 0 and O, and 1, l, and I. This is useful for creating code that requires manual entry.

Can I select a winner from the list of names?

Yes. Please enter one name per line and specify the number of entries. You can also set it to allow no duplicates.

Is the data entered in the list sent to the server?

No. The random selection and generation take place within the browser, and the suggestions you enter are not sent to the server.

Can I choose the format for random colors?

Yes. You can choose from HEX, RGB, and HSL, and actual color swatches are also displayed.

Can I roll multiple dice at the same time?

Yes. When you specify the quantity and the number of sides, it displays each possible outcome and the total.

Is this a cryptographically secure random number?

While the Web Crypto API is used in supported browsers, this tool is not a dedicated system designed for cryptographic key management or audited lotteries.

Can I save the results?

Yes. You can copy the generated results as a whole or save them as a text file.

Is it free to use?

Yes. You can use it for free without registration.