Generating a padded developer sequence in CSV or JSON usually means writing a small script.
List Gen builds a number sequence with zero padding and a choice of plain, CSV or JSON output, with no text to paste.
How to use List Gen
- Set the count, start, step and zero-padding; no pasted text is required.
- Pick plain, CSV or JSON output, and List Gen builds the padded number sequence.
- Copy the generated sequence, or download it as a text file.
Use cases
- Generating zero-padded test identifiers.
- Building a CSV or JSON array of sequential numbers.
- Creating numbered placeholders for development.
Good to know
List Gen generates a sequence from your start value using the count and step, optionally zero-padding each number to a fixed width, and outputs it as plain lines, a comma-separated row or a JSON array. It is aimed at developer placeholder data.
Frequently asked questions
What does zero padding do?
It pads each number with leading zeros to the width you set, so values like 001 and 012 line up.
Which output formats are supported?
You can output plain lines, a comma-separated list, or a JSON array of the generated values.
Is any text input needed?
No. The sequence is built from the count, start, step and padding controls alone.