Generate a Multi-integer Sequence

The Generate a Multi-integer Sequence tool lets you build multiple integer sequences at once. Just feed in a list of start, end, and step values, and it’ll generate a flattened or reversed array instantly. It’s perfect for creating test ranges, loop data, or dynamic sets right in your browser.

Paste your input above or import a file below.
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Supported file types: .txt, .csv, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total items: 0
Options
Remove duplicates
Reverse output
Maximize output

How to Use:

  • In the input box, enter one sequence per line using the format:
    start,end,step (example: 1,10,1)
  • Add as many lines as you want each will generate its own integer sequence.
  • Use the Options toggles:
    • Remove duplicates – filters out any repeat numbers across all ranges.
    • Reverse output – flips the final array backward.
    • Maximize output – expands the output box for larger sequences.
  • Output updates live as you type or change settings.
  • Use Copy Output to copy the result.
  • Use Export to File to save it as a .txt.
  • Hit Clear All to reset input and output instantly.

What Generate a Multi-integer Sequence can do:

This tool takes multiple sets of start, end, and step values and creates sequences from them all in one go. Each line creates a range going up or down and all results are combined into a single array. You can easily remove duplicates or reverse the output list. It works great for scripting, test input, loop creation, and number range generation.

It all happens live, in-browser, with no file upload safe, fast, and totally flexible.

Example:

Input:

1,5,1
20,10,-2
3,15,3

Output:

1, 2, 3, 4, 5, 20, 18, 16, 14, 12, 10, 3, 6, 9, 12, 15

(With remove duplicates on):

1, 2, 3, 4, 5, 20, 18, 16, 14, 12, 10, 6, 9, 15

Common Use Cases:

This tool is ideal for developers, QA testers, educators, and anyone who needs multiple ranges of integers fast. Whether you’re prepping loop data, feeding simulations, or building datasets it’ll save you the trouble of writing scripts or formulas.

Useful Tools & Suggestions:

After using Generate a Multi-integer Sequence, try Print Increasing Integers or Print Decreasing Integers if you want a quick version with simpler controls. And if you’re combining multiple outputs, Join Integers helps you collapse the sequence into a single line.

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