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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.

᠎᠎᠎          Tool Options

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.

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 try!

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://onlinetools.com/list/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=%252C%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 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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