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List length finder

World's simplest list tool

This is a super simple browser-based application that finds the length of a list. It can count the number of all list items, only the unique items, or only the duplicate items. It can also include or exclude empty items and items consisting of only whitespace characters. Created by list geeks from team Browserling.
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Item Finding Mode
Use this mode to find items that have a constant delimiter.
Use this mode to find items that have variable delimiters.
Constant delimiter or a regular expression for variable delimiters.
Counting Mode
Find the number of all items in the list.
Find the number of unique items in the list.
Find the number of repeated items in the list.
Empty and Invisible Items
Include items of zero length in the count.
Include items that contain only whitespace in the count.
List length finder tool What is a list length finder?
With this utility, you can get the total count of items in a list. By default, it counts the number of all items, including empty items and invisible items (invisible items are those that contain only whitespaces). You can also adjust the counting mode and count just the unique items or just the duplicate items. Before the program can count the items, it has to parse the input data and find the list items. To do that, you need to tell the program how the items are separated and the separator can be configured in the options. By default, the program uses the split-by-character mode. It's suitable for cases when the delimiter matches a constant character or a group of constant characters. For example, in the list "1 2 3", the delimiter is the space character and in the list "1/\2/\3", the delimiter is a slash and a backslash symbol "/\". In the case when the separator changes between items, you can use the split-by-regex mode. For example, the list "1, 2; 3" uses a comma and a semicolon to separate items and the regular expression /[, ;]+/ will work in this case. If you don't want to count empty items, then deselect the "Count Empty Items" option. Similarly, to avoid counting items made out of just spaces, tabs, and newlines, deselect the "Count Invisible Items" option. Listabulous!
List length finder examples Click to use
Length of a Hex List
In this example, we count elements in a list and calculate how many hexadecimal numbers there are in this list. Since the input list uses the same symbol as a delimiter for all items, we use the symbol-delimiter match mode and enter the comma symbol in the option below. With these options, we quickly find the total number of hexadecimal values in the list, including blank and whitespace items.
0x1, , 0x2, 0x3, 0x4, , 0x5, 0x6, 0x7, 0x8, , 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, ,
104
Required options
These options will be used automatically if you select this example.
Use this mode to find items that have a constant delimiter.
Constant delimiter or a regular expression for variable delimiters.
Find the number of all items in the list.
Include items of zero length in the count.
Include items that contain only whitespace in the count.
Count Unique Months
In this example, the input list of month names is neatly formatted and uses several different separator characters, such as tabs, spaces, and newlines to evenly align all the months in nice columns. To properly separate the months in this multi-column list, we select the mode where a regular expression matches all separator characters and enter /\s+/ in the regular expression field. As some months repeat more than once, we choose to count only the unique items and get the value 12 in the output, which confirms that no months were missed or mistyped.
June July December April August March February November May July October March September December January June November June
12
Required options
These options will be used automatically if you select this example.
Use this mode to find items that have variable delimiters.
Constant delimiter or a regular expression for variable delimiters.
Find the number of unique items in the list.
Include items of zero length in the count.
Include items that contain only whitespace in the count.
Count Duplicate Items
In this example, we're using the first three English letters to demonstrate how counting duplicate items works. There are multiple ways to count duplicate items and we're using the formula "total = unique + duplicate" to find the duplicate items count. If we rearrange the terms, we get "duplicate = total - unique". The first three letters in the example are unique and all the others are their copies. Therefore, the counting starts after the third items and the program finds that there are 6 duplicate copies.
a; b; c; a; a; b; b; c; c
6
Required options
These options will be used automatically if you select this example.
Use this mode to find items that have a constant delimiter.
Constant delimiter or a regular expression for variable delimiters.
Find the number of repeated items in the list.
Include items of zero length in the count.
Include items that contain only whitespace in the count.
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/find-list-length?input=0x1%2C%20%2C%200x2%2C%200x3%2C%200x4%2C%20%2C%200x5%2C%200x6%2C%200x7%2C%200x8%2C%20%2C%200x9%2C%200xa%2C%200xb%2C%200xc%2C%200xd%2C%200xe%2C%200xf%2C%200x10%2C%200x11%2C%200x12%2C%200x13%2C%200x14%2C%200x15%2C%200x16%2C%200x17%2C%200x18%2C%200x19%2C%200x1a%2C%200x1b%2C%200x1c%2C%200x1d%2C%200x1e%2C%200x1f%2C%200x20%2C%200x21%2C%200x22%2C%200x23%2C%200x24%2C%200x25%2C%200x26%2C%200x27%2C%200x28%2C%200x29%2C%200x2a%2C%200x2b%2C%200x2c%2C%200x2d%2C%200x2e%2C%200x2f%2C%200x30%2C%200x31%2C%200x32%2C%200x33%2C%200x34%2C%200x35%2C%200x36%2C%200x37%2C%200x38%2C%200x39%2C%200x3a%2C%200x3b%2C%200x3c%2C%200x3d%2C%200x3e%2C%200x3f%2C%200x40%2C%200x41%2C%200x42%2C%200x43%2C%200x44%2C%200x45%2C%200x46%2C%200x47%2C%200x48%2C%200x49%2C%200x4a%2C%200x4b%2C%200x4c%2C%200x4d%2C%200x4e%2C%200x4f%2C%200x50%2C%200x51%2C%200x52%2C%200x53%2C%200x54%2C%200x55%2C%200x56%2C%200x57%2C%200x58%2C%200x59%2C%200x5a%2C%200x5b%2C%200x5c%2C%200x5d%2C%200x5e%2C%200x5f%2C%200x60%2C%200x61%2C%200x62%2C%200x63%2C%200x64%2C%20%2C&string-separator=true&input-separator=%2C%20&count-all=true&count-empty=true&count-invisible=true
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 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 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.
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.
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 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 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 the Empty List
Generate a list with no items.
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.
Let Zalgo Destroy a List
Let Zalgo loose on a list and create list-chaos.