Generate a Long Number

Generate a Long Number gives you a quick and flexible way to create large numeric values with total control over formatting. You decide how many numbers to generate, how long each number should be, and whether to use decimals or include negatives. The output updates instantly, flashes when it changes, and stays right in your browser. Generate a Long Number is ideal when you need clean, consistent large values fast.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .json, .xml, .yaml, .html, .css
Total items: 0
Options
Use decimal values
Allow negative numbers

How to Use:

Type how many numbers you want in the input box. You can also import a file containing a number. The tool responds instantly once a valid input is provided, and the output flashes to show it’s updated.

In the Options box, choose how long each number should be. You can select 6, 8, or 10 digits using the radio buttons. Want decimal values instead of plain integers? Turn on the “Use decimal values” toggle. If you need negative numbers too, just enable the “Allow negative numbers” switch. Once you’ve made your selections, copy or export your results. The counter beneath the output tells you how many items you generated.

What Generate a Long Number can do:

Generate a Long Number helps you build clean lists of long random values great for test cases, mock data, or numeric simulations. You control the length of each number, the formatting, and whether the values should include decimal places or negative signs.

Everything happens locally in your browser. No page reloads, no server delays. You type, the result flashes, and you’re ready to copy or export. It’s simple, fast, and ready to fit your needs.

Example:

Input:

3

With default settings (6-digit, integers only):

764230
102394
348291

With 8-digit decimal values and negatives ON:

-94817291.2031
38102741.0004
-52819300.4718

Common Use Cases:

Use this when you need random large values for financial data, synthetic test sets, ID fields, or numeric placeholders. You can quickly adjust the format and structure to match your goals, then copy or export everything in one click. It’s built for speed and flexibility.

Useful Tools & Suggestions:

Once you’ve got that long string, Perturb Numbers can help you tweak it with some randomness perfect if you’re testing variability. Or if you want to clean it up for display, Remove Decimal Point strips it down to just the digits.

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