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List Length Changer

World's Simplest List Tool

This is a super simple browser-based application that changes the length of a list and adds or removes items to/from it to get the exact number of items in the final list. You can load any list in the input, separate its items by any character (or a regular expression), and set the required number of items in the options. You can specify one or more items to add to the list (if it's too short) and specify the side where these items will be added. You can also remove items from either side to make it shorter. Created by list geeks from team Browserling.

List Length Changer

World's Simplest List Tool

This is a super simple browser-based application that changes the length of a list and adds or removes items to/from it to get the exact number of items in the final list. You can load any list in the input, separate its items by any character (or a regular expression), and set the required number of items in the options. You can specify one or more items to add to the list (if it's too short) and specify the side where these items will be added. You can also remove items from either side to make it shorter. Created by list geeks from team Browserling.

᠎᠎᠎          Tool Options

Split Input List into Items

Use a symbol delimiter if items
in the input have a constant
symbol between them.
Use a regex separator when
multiple characters appear
between list items.
Splitting symbol or regular
expression.

New List Length

Set the length of the new list.
New item(s) to add to the list.
(When its size is increased.)
Add/remove items to/from the
right side of the list.
Add/remove items to/from the
left side of the list.

Join Items in Output List

Use this symbol to concatenate
list items in the output.
Exclude those items from
the list that do not contain
any visible symbols.

What Is a List Length Changer?

This online utility changes list's size by either adding new items to it (if the size is increased) or removing existing items from it (if the size is decreased). In the options, there's a field where you can set the total number of items that the list should have. For example, if you have a list with 25 items, you can extend it to have 100 items, or if you have a list with 77 items, then you can contract it to have only 50 items. You can also start with an empty list and create a list with exactly 200 items in it (or any other number). Regardless of the length of the initial input list, you'll get a new list with exactly the specified number of items in the output. To make the program correctly identify items in the list and calculate the initial number of items, when you load your list into the input field, you have to indicate what separator is used between its items. It can be a simple character (which is specified in the character delimiter mode) or it can be several changing characters (which are specified in the regular expression mode). If the current item count is greater than the desired list length, then the program will truncate the list to the desired length. If the current number of items is less than the desired length of the list, then the program will pad the list with items specified in the new-items option. You can extend the list with a single item that's duplicated multiple times or enter several items (one per line) and they will be cycled through and repeatedly appended to the list. You can add items to the list both on the left side (beginning of the list) and on the right side (end of the list). Technically speaking, when the items are added at the beginning of the list, this operation is called left padding, and when the items are added at the end of the list, the operation is called right padding. Also, you can remove empty items and specify the connection symbol for the items in the output. Listabulous!

What Is a List Length Changer?

This online utility changes list's size by either adding new items to it (if the size is increased) or removing existing items from it (if the size is decreased). In the options, there's a field where you can set the total number of items that the list should have. For example, if you have a list with 25 items, you can extend it to have 100 items, or if you have a list with 77 items, then you can contract it to have only 50 items. You can also start with an empty list and create a list with exactly 200 items in it (or any other number). Regardless of the length of the initial input list, you'll get a new list with exactly the specified number of items in the output. To make the program correctly identify items in the list and calculate the initial number of items, when you load your list into the input field, you have to indicate what separator is used between its items. It can be a simple character (which is specified in the character delimiter mode) or it can be several changing characters (which are specified in the regular expression mode). If the current item count is greater than the desired list length, then the program will truncate the list to the desired length. If the current number of items is less than the desired length of the list, then the program will pad the list with items specified in the new-items option. You can extend the list with a single item that's duplicated multiple times or enter several items (one per line) and they will be cycled through and repeatedly appended to the list. You can add items to the list both on the left side (beginning of the list) and on the right side (end of the list). Technically speaking, when the items are added at the beginning of the list, this operation is called left padding, and when the items are added at the end of the list, the operation is called right padding. Also, you can remove empty items and specify the connection symbol for the items in the output. Listabulous!


List Length Changer Examples

Click to try!
click me

Change the Length of a Goods List

In this example, the owner of a furniture store decided to go through the inventory and label all boxes of goods. She created a column list of labels for the first 9 boxes but as the remaining 3 boxes were sealed, she wasn't quite sure what was inside of them. To create a printable list of labels for all 12 boxes, she set the length of the new list to 12 items and filled the blank labels with the text "Unknown product".

Bed Lamp Armchair Cupboard Table Curbstone Dresser Nightstand Chair
Bed Lamp Armchair Cupboard Table Curbstone Dresser Nightstand Chair Unknown product Unknown product Unknown product
Required options
These options will be used automatically if you select this example.
Use a symbol delimiter if items
in the input have a constant
symbol between them.
Splitting symbol or regular
expression.
Set the length of the new list.
New item(s) to add to the list.
(When its size is increased.)
Add/remove items to/from the
right side of the list.
Use this symbol to concatenate
list items in the output.
Exclude those items from
the list that do not contain
any visible symbols.
click me

Shorten a Christmas Playlist

In this example, we are preparing a playlist for Christmas. As we also have planned to watch a film in the evening, we decided to shorten the playlist to just six songs. To make the list of songs a fixed length, we paste it in the input, split the Christmas songs by a regexp "/[;,]\s*/" (matches commas and semicolons), and set the length of the output list to 6 items. Job done!

White Christmas; The Christmas Song; Frosty the Snowman; Sleigh Ride; Jingle Bells; Merry Christmas, Baby; Feliz Navidad, This Christmas; Christmas Wrapping; Last Christmas; Deck the Halls, Christmas in Hollis; Let It Snow; What's This?, 8 Days of Christmas; Believe; Joy to the World; Silent Night
White Christmas, The Christmas Song, Frosty the Snowman, Sleigh Ride, Jingle Bells, Merry Christmas
Required options
These options will be used automatically if you select this example.
Use a regex separator when
multiple characters appear
between list items.
Splitting symbol or regular
expression.
Set the length of the new list.
New item(s) to add to the list.
(When its size is increased.)
Add/remove items to/from the
right side of the list.
Use this symbol to concatenate
list items in the output.
Exclude those items from
the list that do not contain
any visible symbols.
click me

Fill a List with Phone Numbers

In this example, we're changing the length of a list of phone numbers. There are only 8 phone numbers in the loaded list but for our purpose, we need it to have 15 items. We separate the input list items with a newline character and set the desired length of the output list to 15 items. To fill the list, we enter three random phone numbers in the new items list and repeatedly add them to the beginning of the list, until the list grows to 15 items.

(808)-780-8093 (292) 991-2438 1-555-760-0385 (761) 619-7513 (619)-862-4369 (763) 424-6568 1-312-556-4860 (500) 345-7914
(111)-111-1111 (222) 222-2222 3-333-333-3333 (111)-111-1111 (222) 222-2222 3-333-333-3333 (111)-111-1111 (808)-780-8093 (292) 991-2438 1-555-760-0385 (761) 619-7513 (619)-862-4369 (763) 424-6568 1-312-556-4860 (500) 345-7914
Required options
These options will be used automatically if you select this example.
Use a symbol delimiter if items
in the input have a constant
symbol between them.
Splitting symbol or regular
expression.
Set the length of the new list.
New item(s) to add to the list.
(When its size is increased.)
Add/remove items to/from the
left side of the list.
Use this symbol to concatenate
list items in the output.
Exclude those items from
the list that do not contain
any visible symbols.

Pro tips Master online list tools

You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!

https://onlinetools.com/list/change-list-length?input=Bed%0ALamp%0AArmchair%0ACupboard%0ATable%0ACurbstone%0ADresser%0ANightstand%0AChair&string-separator=true&input-separator=%255Cn&join-character=%255Cn&new-length=12&fill-items=Unknown%20product&change-from-end=true&skip-empty=false

All List Tools

Didn't find the tool you were looking for? Let us know what tool we are missing and we'll build it!
Quickly print all distinct items of a list.
Quickly print all repeating items of a list.
Quickly count the number of items in a list.
Quickly display list items in multiple colors.
Quickly generate a list of arbitrary length with arbitrary items.
Quickly generate a random length list with random items.
Quickly find certain items in a list.
Quickly find how many times each item appears in the list.
Quickly replace certain items in a list with new items.
Quickly remove items from a list that match a pattern.
Quickly print all list items in reverse order.
Quickly sort list items alphabetically or numerically.
Quickly shuffle list items and make it random.
Quickly randomly pick one or more items from a list.
Quickly create a downloadable image from a list.
Quickly set a new delimiter for items in a list.
Quickly remove the symbol that separates list items.
Quickly change list item delimiters to the same symbol.
Quickly remove items from the beginning or end of a list.
Quickly join all items of a list together.
Quickly create groups of multiple list items.
Quickly extract a part of a list.
Quickly remove all empty items from a list.
Quickly remove whitespace characters around list items.
Quickly create multiple copies of a list.
Quickly rotate list items to the left or right (or up and down).
Quickly enumerate list items and add a counter to them.
Quickly add bullet markers to all items in a list.
Quickly remove all bullet markers from list items.
Quickly wrap all list items in quotes.
Quickly remove all quotation marks from around list items.
Quickly add text on the left and right sides of all list items.
Quickly remove text from the left and right sides of all list items.
Quickly prepend a prefix before each list item.
Quickly delete any prefix from the beginning of all list items.
Quickly append a suffix after each list item.
Quickly delete any suffix from the end of all list items.
Quickly add or remove list items to make it a certain length.
Quickly create multiple columns from a single list.
Quickly create a palindromic list from the given list.
Quickly add new items at the beginning or end of a list.
Quickly left-pad a list with one or more items.
Quickly right-pad a list with one or more items.
Quickly remove items that repeat in a list.
Quickly apply a filter on all list items (extract certain items).
Quickly analyze a list and print its item statistics.

Coming Soon

These list tools are on the way!
Edit a List

View and edit lists in a neat browser-based list editor.

Split a List

Split list items into chunks.

Generate the Powerlist

Create the powerlist of the given list.

Find the Car of a List

Extract the first item from a list.

Find the Cdr of a List

Extract all items except the first of a list.

Apply a Function on a List

Run a JavaScript function on every list item (map function).

Reduce a List

Run the reduce function on a list.

Find Certain List Items

Quickly find and print items that interest you in a list.

Find Repeating List Items

Quickly find and print items that repeat in a list.

Delete Unique List Items

Quickly find and remove items that are unique in a list.

Extract a Sublist from a List

Given start and stop indexes, extract a sublist from a list.

Shift List Items

Shift list items to the left or right (or up and down).

Indent List Items

Add indentation to all list items.

Skew List Items

Make a list go increasingly sideways (to the left or right).

Mirror a List

Quickly create a mirror copy of a list.

Invert a List

Invert the order of items in a list (last becomes first, etc).

Convert a List to Rows

Create multiple rows from a single list.

Convert a List to Excel

Create an Excel (XLS/XLSX) file from a list.

Convert a List to PDF

Create a PDF file from a list.

Convert a Text List to a LaTeX List

Create a LaTeX list from a regular text list.

Convert a Text List to a HTML List

Create a HTML list from a regular text list.

Convert a Text List to a Markdown List

Create a Markdown list from a regular text list.

Compare Two Lists

Find the difference between two lists.

Compare Three Lists

Find the difference between three lists.

Remove One List from Another

Remove elements from a list that appear in the other list.

Find Common Items in Lists

Find items that are shared between two or more lists.

Find Distinct Items in Lists

Find items that are unique in two or more lists.

Zip Two Lists

Join two or more lists together item by item.

Unzip Two Lists

Split an interleaved list into two or more separate lists.

Merge Two Lists

Append a second list at the end of the first list.

Pair List Items

Create pairs from all list items.

Pop List Items

Remove list items at certain index positions.

Push List Items

Add new items at the end of a list.

Splice a List

Modify a list in-place by adding, replacing, or removing items.

Flatten a List

Remove all indentation levels from a list and make it flat.

Make List Items Bold

Quickly apply the bold effect to all list items.

Make List Items Italic

Quickly apply the italic effect to all list items.

Make List Items Cursive

Quickly rewrite all list items in cursive.

Change List Item Font

Quickly change the font of all list items.

Add an Underscore to List Items

Quickly add an underscore to all list items.

Add a Strikethrough to List Items

Quickly add a strikethrough to all list items.

Make List Items Title Case

Quickly change the letter case of all items to title case.

Make List Items Proper Case

Quickly change the letter case of all items to proper case.

Make List Items Random Case

Quickly randomly change the letter case of all items.

Make List Items Lowercase

Quickly change the letter case of all items to small letters.

Make List Items Uppercase

Quickly change the letter case of all items to capital letters.

Remove List Item Counter

Quickly remove any numeration from a list of items.

Create an Empty List

Generate a list with no items (just bullet points).

Visualize a List

Quickly create a graphical representation of a list.

Create a List Cloud

Create an image with a cloud of list items.

Create a Spiral List

Create an image with list items going in a spiral.

Create a ZigZag List

Make list items go in a zigzag.

Add Errors to a List

Add errors and corruption to a list.

Base64-encode a List

Convert any list to base64 encoding.

Base64-decode a List

Convert any list from base64 encoding back to a list.

URL-encode a List

Convert any list to URL encoding.

URL-decode a List

Convert any list from URL encoding back to a list.

Convert a List to JSON

Create a JSON array from a list.

Convert JSON to a List

Create a list from a JSON array.

Convert a List to XML

Create an XML document from a list.

Convert XML to a List

Create a list from an XML document.

Convert a List to YAML

Create a YAML file from a list.

Convert YAML to a List

Create a list from a YAML file.

Convert a Text List to a Binary List

Create a binary list from a text list.

Convert a Binary List to a Text List

Create a text list from a binary list.

Compress a List

Compress a list so it uses less space.

Scroll a List

Create an animation with a list being scrolled.

Let Zalgo Destroy a List

Let Zalgo loose on a list and create list-chaos.


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Created with love by

We're Browserling — a friendly and fun cross-browser testing company powered by alien technology. At Browserling our mission is to make people's lives easier, so we created this collection of online list tools. Our tools are focused on getting things done quickly and as soon as you load your list in the input of any of our tools, you'll instantly get the result. Our list tools are actually powered by our web developer tools that we created over the last couple of years. Check them out!

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