Change List Length - Add or Remove Items to Reach Target Length Online

What is the Change List Length Tool?

The Change List Length tool adjusts the size of your list to an exact number of items. If your list is too short, it pads it with custom items. If it is too long, it truncates it from either end. This is perfect for preparing data templates, creating placeholders, or standardizing list sizes.

How to Use the Change List Length Tool

Enter your list - Paste or type your list items in the input area
Set the new length - Specify the exact number of items you want
Configure fill items - Provide items to pad with when extending the list
Choose the side - Add/remove items from the start or end
Get your output - The resized list appears instantly

Common Use Cases

Create placeholder lists with exactly N items for testing
Standardize data templates to a fixed number of rows
Truncate long lists to a manageable size
Pad short lists with default values for consistent formatting

Frequently Asked Questions

What happens when the list is shorter than the target length?

The tool pads the list by cycling through the fill items you provide. If only one fill item is given, it repeats that item until the target length is reached.

Can I change the length from the beginning instead of the end?

Yes! Use the "Change Side" option to switch between modifying from the start or the end of the list.

Is my data safe?

Yes. All processing is done entirely in your browser. Your data never leaves your computer.