CodeItBro

Sequential Number Generator

Generate sequential number lists with custom ranges, steps, and formatting options.

Generated Sequence

Number Sequences Made Easy

Generate custom number sequences with prefixes, suffixes, and flexible formatting. Perfect for batch file naming, ID generation, and serial number creation.

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Sequences

Why Use This Tool?

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Flexible Control

Set start, end, and step values. Count up, down, or skip numbers as needed.

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Custom Formatting

Add prefixes (ID-) and suffixes (.txt) to create formatted IDs and filenames.

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100% Private

All generation happens in your browser. Nothing transmitted to any server.

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Instant Results

Generate up to 100,000 numbers instantly. Copy all at once.

How It Works

The Sequential Number Generator runs entirely in your browser using JavaScript. Unlike other tools that send your data to a server, we process everything locally on your device. This guarantees 100% privacy and blazing fast speed.

  • No server interaction – data never leaves your device
  • Instant results since there is no network latency
  • Works offline once the page is loaded
  • Free to use with no usage limits

How to Use

1

Set Range

Enter start and end values for your sequence.

2

Configure

Set step increment, prefix, suffix, and output format.

3

Generate

Click Generate to create your number sequence.

Frequently Asked Questions

Can I count backwards?
Yes! Set start higher than end and use a negative step value (e.g., -1).
What do prefix and suffix do?
They add text before and after each number. E.g., prefix "ID-" with "001" becomes "ID-001".
Is there a limit?
The tool limits output to 100,000 numbers to prevent browser issues.
Can I generate decimal sequences?
Currently integers only. Use Excel or similar for decimal sequences.
Is this tool free?
Yes, completely free. All processing happens in your browser.

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The Sequential Number Generator is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.