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List duplicator

World's simplest list tool

This is a super simple browser-based application that duplicates a list and makes multiple copies of its items. When you duplicate the input list, all its items are copied and appended at the end of the original list. For example, you can create two copies of a list, three copies of a list, or even a fractional amount of copies of the original input list, such as 5.5 copies or 7.75 copies. It works with any list format as you can adjusting the input item separator and also you create a new output list format by setting a new output list item separator. Created by list geeks from team Browserling.
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Item Delimiter
Use a character to separate list items. (Default.)
Use a regexp to separate list items. (Advanced.)
Use this field to enter the delimiting symbol or the delimiting regular expression.
Number of Copies
Number of copies of the list.
The copy count can be fractional. For example, 2.5 will create two and a half copies of the list.
Item Joiner
Join items in the duplicated list with this symbol.
List duplicator tool What is a list duplicator?
This online tool creates copies of items of textual, symbolic, and numeric lists. Once you load a list in the input, you'll instantly get as many copies of the same list as you requested in the output. The number of copies is defined in the options and can be either an integer or a fraction. If the quantity is an integer, then you will get exactly that number of lists with all the items in the output. For example, if the input list is "a, b, c", and the copy count is 3, then you will get "a, b, c, a, b, c, a, b, c" in the output. If the quantity is a fraction, then you will get the number of copies equal to the integer part of the quantity plus the sliced part of the list with the number of items equal to the fractional part of the quantity. For example, if the input list is "w, x, y, z", and the copy count is 2.5, then the output list will be two copies of "w, x, y, z" plus a half which is "w, x", so the final output list will be "w, x, y, z, w, x, y z, w, x". To make the tool correctly recognize items in a list, you need to specify the separator that goes between the items. If it's the same character (such as a comma or a space) or string (such as a pattern), use the "Symbol Delimiter" split mode. If it's a changing/dynamic character or string (such as a mix of various symbols), use the "RegExp Delimiter" split mode. After duplicating the list, the items of the new list will be concatenated via the output list item separator symbol that you can also change in the options. Listabulous!
List duplicator examples Click to use
Duplicate a Price List
In this example, we duplicate a price list from a clothing store. We specify the input item delimiter to be the newline symbol, create two copies of the list, and join them also with a newline symbol.
Elegant suit....$600 Coat............$545 Casual shirt....$99 Summer dress....$270 Stylish skirt...$540 Exquisite hat...$80 Handbag.........$400 Shoes...........$260
Elegant suit....$600 Coat............$545 Casual shirt....$99 Summer dress....$270 Stylish skirt...$540 Exquisite hat...$80 Handbag.........$400 Shoes...........$260 Elegant suit....$600 Coat............$545 Casual shirt....$99 Summer dress....$270 Stylish skirt...$540 Exquisite hat...$80 Handbag.........$400 Shoes...........$260
Required options
These options will be used automatically if you select this example.
Use a character to separate list items. (Default.)
Use this field to enter the delimiting symbol or the delimiting regular expression.
Number of copies of the list.
Join items in the duplicated list with this symbol.
Generate 3.33 Copies of a List
In this example, we make 3.33 (three and one-third) copies of the Greek Gods list. As the elements of the input list are separated by commas, spaces, tabs, and newlines, we use the regex "/,\s+|\n+/g" to match all possible separators. As a result, we get three whole lists and another 33% of the original list.
Apollo, Aphrodite, Zeus Athena, Morpheus, Eros Themis, Poseidon, Hermes
Apollo. Aphrodite. Zeus. Athena. Morpheus. Eros. Themis. Poseidon. Hermes. Apollo. Aphrodite. Zeus. Athena. Morpheus. Eros. Themis. Poseidon. Hermes. Apollo. Aphrodite. Zeus. Athena. Morpheus. Eros. Themis. Poseidon. Hermes. Apollo. Aphrodite. Zeus
Required options
These options will be used automatically if you select this example.
Use a regexp to separate list items. (Advanced.)
Use this field to enter the delimiting symbol or the delimiting regular expression.
Number of copies of the list.
Join items in the duplicated list with this symbol.
Create Multiple Copies of a List
In this example, we create 10 copies of the input list. As we set "\n" to the separator character in the options, the utility assumes that each line of the input is a single list item. In this case, the list has just one item that's a full cubic equation. To duplicate it ten times, we enter "10" in the copies option and also set the output list separator to a new line character. This way, the output list has 10 lines with the same cubic equation on each line.
x³ + x² + x + 1 = 0
x³ + x² + x + 1 = 0 x³ + x² + x + 1 = 0 x³ + x² + x + 1 = 0 x³ + x² + x + 1 = 0 x³ + x² + x + 1 = 0 x³ + x² + x + 1 = 0 x³ + x² + x + 1 = 0 x³ + x² + x + 1 = 0 x³ + x² + x + 1 = 0 x³ + x² + x + 1 = 0
Required options
These options will be used automatically if you select this example.
Use a character to separate list items. (Default.)
Use this field to enter the delimiting symbol or the delimiting regular expression.
Number of copies of the list.
Join items in the duplicated list with this symbol.
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://onlinelisttools.com/duplicate-list?input=Elegant%20suit....%24600%0ACoat............%24545%0ACasual%20shirt....%2499%0ASummer%20dress....%24270%0AStylish%20skirt...%24540%0AExquisite%20hat...%2480%0AHandbag.........%24400%0AShoes...........%24260&string-separator=true&input-separator=%5Cn&copies=2&join-character=%5Cn
All list tools
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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 find certain items in a list.
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 set a new delimiter for items in a list.
Quickly remove items from the beginning or end of a list.
Quickly join all items of a list together.
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).
Coming soon These list tools are on the way
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.
Find Non-repeating List Items
Quickly find and print items that don't repeat in a list.
Find Repeating List Items
Quickly find and print items that repeat in a list.
Delete Repeating List Items
Quickly find and remove items that repeat in a list.
Delete Unique List Items
Quickly find and remove items that are unique in a list.
Delete List Separator
Remove the symbol that separates list items.
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).
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).
Reduce a List
Run the reduce function on a list.
Convert a List to an Image
Create an image from a list.
Convert a List to Columns
Create multiple columns from a single list.
Convert a List to Rows
Create multiple rows from a single list.
Convert a List to Excel
Create an Excel 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.
Zip Two Lists
Join two lists together item by item.
Merge Two Lists
Append a second list at the end of the first list.
Pop List Items
Remove list items at certain index positions.
Push List Items
Add new items at the end of a list.
Replace List Items
Replace certain items in a list with new items.
Splice a List
Modify a list in-place by adding, replacing, or removing items.
Create the Empty List
Generate a list with no items.
Create a Random List
Generate a list with random items.
Color List Items
Quickly add colors to list items.
Enumerate List Items
Quickly add a counter to each list item.
Visualize a List
Quickly create a graphical representation of a list.
Let Zalgo Destroy a List
Let Zalgo loose on a list and create list-chaos.
Print List Statistics
Analyze a list and print its item statistics.