Fantomas 4.0.0

.NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package Fantomas --version 4.0.0
                    


                    

                
NuGet\Install-Package Fantomas -Version 4.0.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Fantomas" Version="4.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Fantomas" Version="4.0.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Fantomas" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Fantomas --version 4.0.0
                    


                    

                
#r "nuget: Fantomas, 4.0.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Fantomas@4.0.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Fantomas&version=4.0.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Fantomas&version=4.0.0
                    


                            Install as a Cake Tool

This library aims at formatting F# source files based on a given configuration.
Fantomas will ensure correct indentation and consistent spacing between elements in the source files.
Some common use cases include
(1) Reformatting a code base to conform a universal page width
(2) Converting legacy code from verbose syntax to light syntax
(3) Formatting auto-generated F# signatures.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (4)

Showing the top 4 NuGet packages that depend on Fantomas:

Package Downloads
dotnet-fantomas

This library aims at formatting F# source files based on a given configuration. Fantomas will ensure correct indentation and consistent spacing between elements in the source files. Some common use cases include (1) Reformatting a code base to conform a universal page width (2) Converting legacy code from verbose syntax to light syntax (3) Formatting auto-generated F# signatures.
Falanx.Machinery

Package Description
GiraffeGenerator.Core

Package Description
CellScript.FCS

Package Description

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
8.0.0-alpha-007 75 3/10/2026
8.0.0-alpha-006 76 3/9/2026
8.0.0-alpha-005 75 3/9/2026
8.0.0-alpha-004 74 3/7/2026
8.0.0-alpha-003 87 3/3/2026
8.0.0-alpha-002 327 12/15/2025
8.0.0-alpha-001 120 12/12/2025
7.0.5 53,520 12/5/2025
7.0.4 1,193 12/5/2025
7.0.3 98,487 7/4/2025
7.0.2 40,132 5/28/2025
7.0.1 54,281 2/21/2025
7.0.0 63,503 1/10/2025
7.0.0-beta-001 335 12/30/2024
7.0.0-alpha-004 1,076 12/12/2024
7.0.0-alpha-003 1,204 11/29/2024
7.0.0-alpha-002 374 11/2/2024
7.0.0-alpha-001 228 9/16/2024
6.3.16 70,985 10/29/2024
4.0.0 4,439 8/27/2020
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Add initial support of String Interpolation. [#998](https://github.com/fsprojects/fantomas/issues/998)
Extract FakeHelpers and EditorConfig to Fantomas.Extras project [#986](https://github.com/fsprojects/fantomas/issues/986)
Update FCS to 37. [#996](https://github.com/fsprojects/fantomas/pull/996)
Update FCS to 36. [#899](https://github.com/fsprojects/fantomas/pull/899) [#961](https://github.com/fsprojects/fantomas/pull/961)
Replaced json configuration with .editorconfig. [#650](https://github.com/fsprojects/fantomas/issues/650)
Sunset setting ReorderOpenDeclaration. [#645](https://github.com/fsprojects/fantomas/issues/645)
Sunset setting KeepNewlineAfter. [#737](https://github.com/fsprojects/fantomas/issues/737)
Renamed setting IndentSpaceNum to IndentSize. [#940](https://github.com/fsprojects/fantomas/pull/940)
Renamed setting PageWidth to MaxLineLength. [#940](https://github.com/fsprojects/fantomas/pull/940)
Removed all style configuration options from CLI tool. [#704](https://github.com/fsprojects/fantomas/issues/704)
Added [Benchmarks](https://fsprojects.github.io/fantomas/). [#867](https://github.com/fsprojects/fantomas/issues/867)
Split up setting SpaceBeforeArgument to multiple settings. [#649](https://github.com/fsprojects/fantomas/pull/649)
- SpaceBeforeParameter
- SpaceBeforeLowercaseInvocation
- SpaceBeforeUppercaseInvocation
- SpaceBeforeClassConstructor
- SpaceBeforeMember
Increase control over length of certain code constructs. [#697](https://github.com/fsprojects/fantomas/issues/697)
- MaxRecordWidth
- MaxArrayOrListWidth
- MaxValueBindingWidth
- MaxFunctionBindingWidth
- MaxElmishWidth
Better support for Elmish inspired code. [#922](https://github.com/fsprojects/fantomas/pull/922)
Feature SingleArgumentWebMode. [#927](https://github.com/fsprojects/fantomas/issues/927)
Feature AlignFunctionSignatureToIndentation. [#946](https://github.com/fsprojects/fantomas/issues/946)
Feature AlternativeLongMemberDefinitions. [#913](https://github.com/fsprojects/fantomas/issues/913)
Feature MultilineBlockBracketsOnSameColumn. [#453](https://github.com/fsprojects/fantomas/issues/453)
Feature NewlineBetweenTypeDefinitionAndMembers. [#752](https://github.com/fsprojects/fantomas/issues/752)
Feature KeepIfThenInSameLine. [#825](https://github.com/fsprojects/fantomas/issues/825)
Fix Comments in match statements are sometimes deleted. [#1010](https://github.com/fsprojects/fantomas/issues/1010)
Fix Comments on members with get/set are deleted. [#1009](https://github.com/fsprojects/fantomas/issues/1009)
Fix Hexadecimal numbers in enums are output as decimal numbers. [#1006](https://github.com/fsprojects/fantomas/issues/1006)
Fix List indentation issue. [#999](https://github.com/fsprojects/fantomas/issues/999)
Fix Hexadecimal numbers in match arms are output as decimal numbers. [#995](https://github.com/fsprojects/fantomas/issues/995)
Fix Removes the first comment above the member of the list. [#990](https://github.com/fsprojects/fantomas/issues/990)
Fix Brackets increased every time Fantomas is run. [#989](https://github.com/fsprojects/fantomas/issues/989)
Fix Bug: Hash directive in computation expression. [#977](https://github.com/fsprojects/fantomas/issues/977)
Fix Bug with hash directives inside a match statement. [#976](https://github.com/fsprojects/fantomas/issues/976)
Fix Bug with defines in record member assignment. [#968](https://github.com/fsprojects/fantomas/issues/968)
Fix Backquotes are stripped down from ``checked``. [#937](https://github.com/fsprojects/fantomas/issues/937)
Fix Fantomas wraps extra set of parenthesis around parenthesis. [#921](https://github.com/fsprojects/fantomas/issues/921)
Fix Remove indent setting from CLI tool. [#888](https://github.com/fsprojects/fantomas/issues/888)
Fix Fantomas generating invalid F# when trying to format a list created with yields. [#882](https://github.com/fsprojects/fantomas/issues/882)
Fix Invalid unit test ``method call on multiple lines``. [#862](https://github.com/fsprojects/fantomas/issues/862)
Fix Invalid unit test ``should break on . operator and keep indentation``. [#860](https://github.com/fsprojects/fantomas/issues/860)
Fix Multi-line arguments to chained method calls produce invalid code. [#702](https://github.com/fsprojects/fantomas/issues/702)
Fix Line comment displaced from commented #-directive. [#638](https://github.com/fsprojects/fantomas/issues/638)
Fix #if'd argument types are lost. [#633](https://github.com/fsprojects/fantomas/issues/633)
Fix #if'd attributes moved to wrong column. [#631](https://github.com/fsprojects/fantomas/issues/631)
Fix Assembly attributes create over-long lines. [#629](https://github.com/fsprojects/fantomas/issues/629)
Fix List expression can get combined to a single line with different semantics. [#931](https://github.com/fsprojects/fantomas/issues/931)
Fix Additional new line inserted around attributes. [#949](https://github.com/fsprojects/fantomas/issues/949)
Fix `with get` removal in FSI invalid. [#945](https://github.com/fsprojects/fantomas/issues/945)
Fix FSI file has "abstract" stripped. [#944](https://github.com/fsprojects/fantomas/issues/944)
Fix Insertion of space before function application can break dot-chaining. [#943](https://github.com/fsprojects/fantomas/issues/943)
Fix Concatenation of lines can break operator precedence. [#942](https://github.com/fsprojects/fantomas/issues/942)
Fix Extra spaces inserted in record definition. [#941](https://github.com/fsprojects/fantomas/issues/941)
Fix Comments at the end of async blocks are deleted automatically. [#936](https://github.com/fsprojects/fantomas/issues/936)
Fix Newline between comments should lead to individual comments. [#920](https://github.com/fsprojects/fantomas/issues/920)
Fix VS Code | Extra white space added to record definition. [#910](https://github.com/fsprojects/fantomas/issues/910)
Fix When cutting off function invocations should place each param in its own line (or align them to the 1st param). [#907](https://github.com/fsprojects/fantomas/issues/907)
Fix Try online link points to old location. [#890](https://github.com/fsprojects/fantomas/issues/890)
Fix Leading `|` in single-case union type with access modifier. [#889](https://github.com/fsprojects/fantomas/issues/889)
Fix Type constraint on a type definition causes a loss of the type definition. [#887](https://github.com/fsprojects/fantomas/issues/887)
Fix Fantomas removes the 'and' if there are multiple member constraints on a function declaration. [#886](https://github.com/fsprojects/fantomas/issues/886)
Fix Comments inside a type definition can cause issues. [#885](https://github.com/fsprojects/fantomas/issues/885)
Fix Long function signature should align with equal sign. [#883](https://github.com/fsprojects/fantomas/issues/883)
Fix Newline not preserved between let and let bang. [#879](https://github.com/fsprojects/fantomas/issues/879)
Fix Stackoverflow problem with let bang in match. [#876](https://github.com/fsprojects/fantomas/issues/876)
Fix Incorrect formatting for chained class members using Websharper. [#871](https://github.com/fsprojects/fantomas/issues/871)
Fix Pipe before and inside lambda leads to wrong indent of following lambda. [#870](https://github.com/fsprojects/fantomas/issues/870)
Fix Formatting Program.fs with `--check` fails. [#869](https://github.com/fsprojects/fantomas/issues/869)
Fix Possible wrong indentation for functions with parameters over multiple lines. [#868](https://github.com/fsprojects/fantomas/issues/868)
Fix Invalid unit test ``different attributes according to defines``. [#864](https://github.com/fsprojects/fantomas/issues/864)
Fix Invalid unit test ``record instance with inherit keyword``. [#861](https://github.com/fsprojects/fantomas/issues/861)
Fix Invalid unit test ``should add space before type provider params``. [#859](https://github.com/fsprojects/fantomas/issues/859)
Fix Incorrect end of line added after "(" which makes the code not to compile. [#856](https://github.com/fsprojects/fantomas/issues/856)
Fix Incorrect end of line added after "(". [#855](https://github.com/fsprojects/fantomas/issues/855)
Fix SpaceBeforeUppercaseInvocation applied in the middle of a invocation chain. [#853](https://github.com/fsprojects/fantomas/issues/853)
Fix MultilineBlockBracketsOnSameColumn not working properly when calling base constructors. [#852](https://github.com/fsprojects/fantomas/issues/852)
Fix PageWidth not respected for member with one long parameter. [#850](https://github.com/fsprojects/fantomas/issues/850)
Fix Wrong indentation in member definition. [#844](https://github.com/fsprojects/fantomas/issues/844)
Fix Class type with long variable names results in invalid formatted F# code. [#841](https://github.com/fsprojects/fantomas/issues/841)
Fix Multiline let bang should have newline before. [#838](https://github.com/fsprojects/fantomas/issues/838)
Fix complex computation expression identifier looks off. [#835](https://github.com/fsprojects/fantomas/issues/835)
Fix keyword before type declaration leads to invalid F# code. [#830](https://github.com/fsprojects/fantomas/issues/830)
Fix Inconsistent if-then-else cut. [#825](https://github.com/fsprojects/fantomas/issues/825)
Fix MultilineBlockBracketsOnSameColumn=true not working on records with short names. [#823](https://github.com/fsprojects/fantomas/issues/823)
Fix --config fantomas-config.json gives error. [#821](https://github.com/fsprojects/fantomas/issues/821)
Fix multiline let bang should have a newline. [#819](https://github.com/fsprojects/fantomas/issues/819)
Fix Updated value not indented correctly. [#817](https://github.com/fsprojects/fantomas/issues/817)
Fix Comment removed in multi-case pattern matching. [#813](https://github.com/fsprojects/fantomas/issues/813)
Fix Wrong handling multi lines comment at the end of file after function application. [#810](https://github.com/fsprojects/fantomas/issues/810)
Fix Opening brace for test missing. [#806](https://github.com/fsprojects/fantomas/issues/806)
Fix Return attribute deleted on reformatting. [#800](https://github.com/fsprojects/fantomas/issues/800)
Fix Fantomas crash with evaluation of array member. [#798](https://github.com/fsprojects/fantomas/issues/798)
Fix Type restrictions in FSI files. [#797](https://github.com/fsprojects/fantomas/issues/797)
Fix AssemblyInfo.fs attributes get squashed together. [#796](https://github.com/fsprojects/fantomas/issues/796)
Fix Byte-order mark is stripped. [#795](https://github.com/fsprojects/fantomas/issues/795)
Fix Fantomas replaces "abstract" in fsi leading to compile errors. [#794](https://github.com/fsprojects/fantomas/issues/794)
Fix Broken links in Readme.md. [#791](https://github.com/fsprojects/fantomas/issues/791)
Fix Multiline first member should not introduce initial newline. [#789](https://github.com/fsprojects/fantomas/issues/789)
Fix Newline added before let binding with attribute in class. [#786](https://github.com/fsprojects/fantomas/issues/786)
Fix Some floating-point numbers are changed. [#785](https://github.com/fsprojects/fantomas/issues/785)
Fix Adding newline before first comment in module. [#784](https://github.com/fsprojects/fantomas/issues/784)
Fix Parameter after multiline string parameter. [#783](https://github.com/fsprojects/fantomas/issues/783)
Fix Modulo operator misplaced. [#780](https://github.com/fsprojects/fantomas/issues/780)
Fix double-backtick identifier is formatted wrong when starts with non-alphanum character. [#776](https://github.com/fsprojects/fantomas/issues/776)
Fix Line comment after record not printed. [#774](https://github.com/fsprojects/fantomas/issues/774)
Fix Additional blank lines inserted after formatting. [#772](https://github.com/fsprojects/fantomas/issues/772)
Fix Error while formatting Fantomas unit test with compiler define. [#761](https://github.com/fsprojects/fantomas/issues/761)
Fix AbstractSlot with line comment is consider multi line. [#757](https://github.com/fsprojects/fantomas/issues/757)
Fix Missing space after multiline string. [#754](https://github.com/fsprojects/fantomas/issues/754)
Fix Cannot determine upper or lowercase. [#753](https://github.com/fsprojects/fantomas/issues/753)
Fix Feature: Add blank line between type definition and members. [#752](https://github.com/fsprojects/fantomas/issues/752)
Fix Default member implementation changed to member during formatting. [#742](https://github.com/fsprojects/fantomas/issues/742)
Fix Long function definition should put equals and body on a newline. [#740](https://github.com/fsprojects/fantomas/issues/740)
Fix Add extra space between prefix operator and string. [#736](https://github.com/fsprojects/fantomas/issues/736)
Fix MaxIfThenElseShortWidth is not respected. [#734](https://github.com/fsprojects/fantomas/issues/734)
Fix Shouldn't remove getters. [#733](https://github.com/fsprojects/fantomas/issues/733)
Fix Comment after `then` keyword gets removed. [#730](https://github.com/fsprojects/fantomas/issues/730)
Fix Determine if DotGet expression is upper- or lowercase. [#729](https://github.com/fsprojects/fantomas/issues/729)
Fix Check for Trivia content before the equals sign in let bindings. [#728](https://github.com/fsprojects/fantomas/issues/728)
Fix When advising user to file a bug should mention the file it was trying to format. [#726](https://github.com/fsprojects/fantomas/issues/726)
Fix space removed from parameters passed to inherited class. [#720](https://github.com/fsprojects/fantomas/issues/720)
Fix Place parameters on a new line for very long member definitions. [#719](https://github.com/fsprojects/fantomas/issues/719)
Fix Exception: Unexpected scenario when formatting else if / elif. [#713](https://github.com/fsprojects/fantomas/issues/713)
Fix Fantomas keeps adding newlines every time you format. [#709](https://github.com/fsprojects/fantomas/issues/709)
Fix Duplicate spaces and lost of linecomment. [#687](https://github.com/fsprojects/fantomas/issues/687)
Fix Formatting of array literals of BigInteger. [#682](https://github.com/fsprojects/fantomas/issues/682)
Fix Hash directive not between namespace and module. [#681](https://github.com/fsprojects/fantomas/issues/681)
Fix Comment above static member is wrongly placed. [#680](https://github.com/fsprojects/fantomas/issues/680)
Fix Do not remove property setters. [#664](https://github.com/fsprojects/fantomas/issues/664)
Fix StringConstant printed twice. [#646](https://github.com/fsprojects/fantomas/issues/646)
Fix Newline after "bang" keywords in computation expressions. [#615](https://github.com/fsprojects/fantomas/issues/615)
Fix Incorrect indentation when folding a record update expression. [#536](https://github.com/fsprojects/fantomas/issues/536)
Fix Preserve comments after record. [#516](https://github.com/fsprojects/fantomas/issues/516)
Fix Long function signature broken into two lines. [#492](https://github.com/fsprojects/fantomas/issues/492)
Fix "Better" support for nesting complex expressions in async { } blocks. [#386](https://github.com/fsprojects/fantomas/issues/386)