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Set reverser

World's simplest set tool

With this online application, you can quickly reverse the order of elements in an ordered set. As different sets have different notations, you can adjust the open-set and close-set symbols, as well as customize the element separator symbol for the input and output sets. Created by team Browserling.
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Input Set Notation
Character that separates the elements in the input set.
Open symbol.
Close symbol.
Reversed Set Notation
Character that separates the elements in the output set.
Open symbol.
Close symbol.
Set reverser tool What is a set reverser?
This browser-based program reverses the given ordered set. It doesn't change the collection of objects in the set but only rearranges the elements so that they are output in reverse order. Usually, curly braces are used to denote a set and the elements within a set are separated by commas. Sometimes, however, they can also be written in a different style, such as regular brackets instead of curly brackets and semicolons instead of commas. The default settings are configured for the standard set format with curly brackets and commas but we also added an option that lets you use a different set format. If you use a different set format, you can adjust the open and close set characters, as well as set the element separator. You can also create a new set format for the reversed set by changing the output set notation options. Here are some examples to illustrate how this utility works. If the input is the ordered set {1, 2, 3}, then it's converted to the reversed set {3, 2, 1}. If the input set uses a different style, such as square parenthesis and semicolons, and the output set is configured to use round parenthesis and spaces between elements, then the set [x; y; z] is reversed to (z y x). This utility is also able to reverse multisets with repeated elements. Setabulous!
Set reverser examples Click to use
Reverse a Set of Digits
In this example, we load an ordered set of digits from 0 to 9 as the input set and apply the set reversal algorithm to it. The algorithm rearranges the elements of the input set and displays them in the reverse order from 9 to 0. Since we are using the default set style options (curly braces and commas) the output set style is the same as the input set style.
{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
{9, 8, 7, 6, 5, 4, 3, 2, 1, 0}
Required options
These options will be used automatically if you select this example.
Character that separates the elements in the input set.
Open symbol.
Close symbol.
Character that separates the elements in the output set.
Open symbol.
Close symbol.
Greek Alphabet Set
This example reverses a custom set that consists of the Greek alphabet letters. This set uses the square brackets [ ] to denote the set and it uses the space character as an element separator character. To correctly extract individual elements from the set, we need to customize the input set formatting options and change the set-open symbol to [, set-close symbol to ], and separator symbol to the space. For the output set, we also use a custom format and change the set-open and set-close symbols to "<" and ">", and "-" as the element separator symbol.
[α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ σ τ υ φ χ ψ ω]
<ω-ψ-χ-φ-υ-τ-σ-ρ-π-ο-ξ-ν-μ-λ-κ-ι-θ-η-ζ-ε-δ-γ-β-α>
Required options
These options will be used automatically if you select this example.
Character that separates the elements in the input set.
Open symbol.
Close symbol.
Character that separates the elements in the output set.
Open symbol.
Close symbol.
Rainbow Set
The input set in this example consists of multi-colored Unicode squares that are arranged in rainbow colors from red to violet. As the input set doesn't have open-set and close-set characters around it, and all set elements are joined together with no delimiter symbols between them, we leave the input set format fields blank. When the program runs, it rearranges the rainbow colors in reverse order from violet to red, and to make this example more pretty, it also places a diamond shape separator between the colors.
🟥🟧🟨🟩🟦🟪
🟪💠🟦💠🟩💠🟨💠🟧💠🟥
Required options
These options will be used automatically if you select this example.
Character that separates the elements in the input set.
Open symbol.
Close symbol.
Character that separates the elements in the output set.
Open symbol.
Close symbol.
Pro tips Master online set 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://onlinesettools.com/reverse-set?input=%7B0%2C%201%2C%202%2C%203%2C%204%2C%205%2C%206%2C%207%2C%208%2C%209%7D&input-element-separator=%2C%20&input-open-set=%7B&input-close-set=%7D&output-element-separator=%2C%20&output-open-set=%7B&output-close-set=%7D
All set tools
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Quickly find the powerset P(S) of the given set S.
Quickly reverse the order of elements in an ordered set.
Quickly find the number of elements in a set.
Quickly apply the set union operation on two or more sets.
Quickly apply the set intersection operation on two or more sets.
Quickly apply the set difference operation on two or more sets.
Coming soon These set tools are on the way
Draw a Venn Diagram
Illustrate two or more sets as a Venn diagram.
Find Set Symmetric Difference
Apply the set difference operation on sets A and B.
Find Set Cartesian Product
Apply the set cartesian product operation on sets A and B.
Find All Subsets of a Set
Quickly find all sets that are subsets of set A.
Find All Set Permutations
Generate all permutations of set elements.
Enumerate a Set
Add numbering to all set elements.
Filter a Set
Print set elements that match a filter.
Find Set Elements
Find elements in a set that match certain criteria.
Apply a Function on a Set
Run a function on all elements in a set.
Convert a Multiset to a Set
Convert a set with repeated elements to a standard set.
Convert a Set to a List
Create a list from the given set.
Convert a List to a Set
Create a set from the given list.
Convert a Set to an Array
Create an array from the given set.
Convert an Array to a Set
Create a set from the given array.
Duplicate Set Elements
Repeat set elements multiple times.
Print Duplicate Elements
Find all duplicate elements in a set.
Remove Duplicate Elements
Delete all duplicate elements from a set (leave unique).
Print Unique Elements
Find all unique elements in a set.
Remove Unique Elements
Delete all unique elements from a set (leave duplicates).
Remove Empty Set Elements
Delete empty elements (zero-length elements) from a set.
Find Set Depth
Calculate how many levels of subsets a set has.
Flatten a Set
Decrease subset nesting.
Truncate a Set
Remove elements from a set and make it smaller.
Truncate Set Elements
Shorten all set elements to the given length.
Expand a Set
Add elements to a set and make it bigger.
Split a Set
Split a set into a certain number of subsets.
Join Sets
Merge multiple sets together to form one large set.
Slice a Set
Extract an index-based subset from a set.
Partition a Set
Find disjoint subsets of the given set whose union is the same set.
Randomize a Set
Randomly change the order of elements in a set.
Select a Random Set Element
Pick a random element from the given set.
Select a Random Subset
Pick a random subset of the given set.
Generate an Empty Set
Create a set with no elements.
Generate a Digit Set
Create a set that contains digits.
Generate a Number Set
Create a set that contains numbers.
Generate an Integer Set
Create a set that contains integers.
Generate a Decimal Set
Create a set that contains decimal fractions.
Generate a Letter Set
Create a set that contains letters.
Generate a Character Set
Create a set that contains characters.
Generate a Word Set
Create a set that contains words.
Generate a String Set
Create a set that contains strings.
Generate a Text Set
Create a set that contains text.
Generate a Sentence Set
Create a set that contains sentences.
Generate a Random Set
Create a set that contains random elements.
Generate a Custom Set
Create a custom set with custom elements and custom size.
Generate an Infinite Set
Create a set with infinitely many elements.
Generate a Finite Set
Create a set with a finite number of elements.
Change Set Notation
Change the open-set, close-set, and element separator symbols.
Change Set Size
Add or remove set elements to make it a certain size/length.
Destroy a Set
Launch a Zalgo attack on a set and destroy it.
Compare Sets
Find all differences between two or more sets.
Symmetrize a Set
Convert a regular set to a symmetric multi-set.
Color a Set
Add colors to set elements.
Visualize a Set
Create an abstract visualization of a set.
Convert a Set to an Image
Create a downloadable picture from a set.
Print Set Analytics
Analyze a set and print its statistics.