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List filter
World's simplest list tool
This is a super simple browser-based application that filters list items and extracts only the items that you're interested in. You can filter a list and print items that contain a specified substring, that include only specific characters, or you can use an advanced regular expression to extract more complicated items. You can also invert the filtered result and prettify the output list by changing its item delimiter. Created by list geeks from team Browserling.
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What is a list filter?
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This online program extracts items from a list that match the specified filtering pattern. For example, you can extract items from a list that contain only numbers, only words, or only letters. Additionally, you can extract only items with special characters in them or items that contain the given substring. Once you paste your list into the input area, you need to tell the filtering algorithm how your list items are separated. This can be done in the first block of options. When working with simple lists, you can use the symbolic item separator mode. In this mode, the separator of items can be a simple character such as a comma, a semicolon, or a vertical bar symbol, and all you need to do is specify this character (a comma "," character, a semicolon ";" character, or a vertical pipe "|" character) in the input delimiter option. If the input list contains multiple delimiters, then you can use the regex item separator mode. For example, use the regex "/\s+/" to match all white spaces (regular spaces, tabs, new lines), or "/,|\./" to match all items that may be separated by both commas and dots. All in all, we implemented three different item filtering modes in this utility. The first mode is called "Filter by a Substring", and it allows to extract all the items that have the specified substring. For example, if you specify the substring "cat" in the pattern field, the program will extract all items that contain the substring "cat". The second mode is called "Filter by a Character Set", and it extracts all items that are made up of the specified characters. For example, if you specify the digits "1234567890" here, the program will extract all items that are numbers. The third mode is called "Filter by a Regexp", and it extracts those items that match the specified regular expression. For example, the regular expression "/\d+%/" will extract all items that contain percentages, such as "25%" or "8%". If you need to extract the opposite (non-matching) items of the list, you can quickly do it by clicking the invert filter option in the third block of options. Also, you can specify the glue character for the filtered list and neatify it. Listabulous!
List filter examples
Click to useFilter a List of Words
In this example, we filter a list of words and print items in it that contain the pattern "me" in the words. To do this, we activate the "Filter by a Substring" mode and enter "me" in the match pattern option. Since the input list contains many different word separator symbols (comma, semicolon, space, newline), we use the regular expression separator "/[,;]\s+/" to extract the words. This regex matches commas and semicolons followed by a space, a tab, or a newline. To make the filtered list more consistent, we put a comma as a separator character.
horse, timer, bird;
name, melon, lamp;
right, lime, camel;
metro, dime, apple;
smell, coat, home;
game, metal, meat;
taxi, plant, milk;
wine, deer, wolf;
timer, name, melon, lime, camel, metro, dime, smell, home, game, metal, meat
Required options
Use a matching regular
expression to separate list items.
Matching character (or string)
or regular expression.
Set the item glue character of
the items in the filtered list.
Extract all items that contain
the given substring.
Extract items opposite of
the specified filter options.
Filter Dates in a List
In this example, we're working with a column list of dates in different formats. Our job is to extract those dates, which are not entirely numeric. In other words, we want to filter all dates that have days, months, or years written out in words. To do this, we switch to the "Filter by a Character Set" mode, enter all the digits 0 to 9 and symbols "/-" in the filter pattern, and select the invert matches mode. This way, the program extracts all items that don't consist only of characters "-/1234567890", which are spelled dates. As the input list is a column list, we also make the output list a column list by setting the item separating symbol to a newline character.
09/13/2022
07-17-2009
Jul 15, 2000
January 01, 2006
Wed, Oct 20, 2010
08 Nov 2000
09 July 2015
Tue, 22 Nov, 2022
2025, 08 Aug
2019/07/07
2008, 28 January
21/07/2015
Jul 15, 2000
January 01, 2006
Wed, Oct 20, 2010
08 Nov 2000
09 July 2015
Tue, 22 Nov, 2022
2025, 08 Aug
2008, 28 January
Required options
Use a matching character (or
a string) to separate list items.
Matching character (or string)
or regular expression.
Set the item glue character of
the items in the filtered list.
Extract all items that consist
of the given characters.
Extract items opposite of
the specified filter options.
Filter Geographic Coordinates
In this example, we filter out only valid geographic coordinates from a vertical data list. We use the "Filter by a Regexp" mode and enter the regular expression "^\d+°\d+′[NESW] \d+°\d+′[NESW]$". This regexp matches strings with degrees and decimal minutes in the longitude and latitude parts of the coordinate. We also display the filtered coordinates in a vertical column.
vel@lorem.edu
Ap #854-6675
KDN24QSG7QD
9°56′N 84°05′W
9977 Orci Av.
(169) 327-8111
284-491 Nula Av.
38°43′N 9°08′W
29°33′N 34°57′E
2°59′S 104°45′E
3782342-39
50°38′N 3°03′E
45°52′S 67°29′W
9°56′N 84°05′W
38°43′N 9°08′W
29°33′N 34°57′E
2°59′S 104°45′E
50°38′N 3°03′E
45°52′S 67°29′W
Required options
Use a matching character (or
a string) to separate list items.
Matching character (or string)
or regular expression.
Set the item glue character of
the items in the filtered list.
Extract all items that match
the given regular expression.
Extract items opposite of
the specified filter options.
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/filter-list?input=horse%2C%09timer%2C%09bird%3B%0Aname%2C%09melon%2C%09lamp%3B%0Aright%2C%09lime%2C%09camel%3B%0Ametro%2C%09dime%2C%09apple%3B%0Asmell%2C%09coat%2C%09home%3B%0Agame%2C%09metal%2C%09meat%3B%0Ataxi%2C%09plant%2C%09milk%3B%0Awine%2C%09deer%2C%09wolf%3B®exp-separator=true&input-separator=%2F%5B%2C%3B%5D%5Cs%2B%2F&filter-by-string=true&string=me&invert=false&join-character=%2C%20
All list tools
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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@browserling
We're Browserling — a friendly and fun cross-browser testing company powered by alien technology. At Browserling our mission is to make developers' lives easier, so we created this collection of online list tools. Unlike many other tools, we made our tools free, without ads, and with the simplest possible user interface. Our online list are actually powered by our programming tools that we created over the last couple of years. Check them out!
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the legal stuff
By using Online List Tools you agree to our Terms of Service. TLDR: You don't need an account to use our tools. All tools are free of charge and you can use them as much as you want. You can't do illegal or shady things with our tools. We may block your access to tools, if we find out you're doing something bad. We're not liable for your actions and we offer no warranty. We may revise our terms at any time.