Developer Tools

Integer Range Generator

Generate a list of integers — set start, end, step, and optional prefix/suffix — and copy them in one click.

Last updated: May 29, 2026

Client-Side Processing

Input Data Stays on Device

Instant Local Execution

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What is Integer Range Generator?

Integer Range Generator produces a sequence of integers from a start value to an end value using a configurable step size. The output can include an optional prefix and suffix on each value and can be separated by newlines, commas, or spaces. Negative step values generate countdown sequences. Useful for generating test data, SQL IN clause values, CSS media breakpoints, or any scenario where a predictable integer sequence is needed.

How to Use Integer Range Generator

1

Set start, end, and step values.

2

Optionally add a prefix or suffix.

3

Choose a separator.

4

Copy the output.

Common Use Cases

Generating a list of IDs or indexes for test data.
Creating SQL IN clause values: 1, 2, 3, ..., 100.
Producing CSS pixel values at regular increments (8, 16, 24, 32...).
Generating countdown sequences or reverse indexes.

Example Input and Output

Generate even numbers from 2 to 10 with a "px" suffix.

Start=2, End=10, Step=2, Suffix=px

Start: 2
End: 10
Step: 2
Suffix: px

Output

2px
4px
6px
8px
10px

Privacy

All processing runs locally in the browser.

Frequently Asked Questions

What is the maximum number of values?

The generator produces up to 10,000 values to prevent browser slowdowns. For larger sequences, use a script or spreadsheet formula.

Can I generate a countdown?

Yes. Set start higher than end and use a negative step (e.g. start=10, end=1, step=-1).

Is my data uploaded?

No. All generation runs in your browser.

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