A curated list of code formatters. Inspired by awesome-machine-learning. Other awesome lists can be found in the awesome-awesomeness list.

If you want to contribute to this list (please do), send me a pull request or contact me @rishirdua

Table of Contents

• General Purpose
• Language Specific
  • C/C++
  • Cobol
  • CSS
  • Fortran
  • Haskell
  • HTML
  • Java
  • JavaScript
  • JSP
  • .NET
  • Perl
  • PHP
  • PL/SQL
  • Python
  • Ruby
  • Shell
  • VBS
  • XML

General Purpose

• Artistic Styler - Source code indenter, formatter, and beautifier for the C, C++, C# and Java programming languages.
• Atom-Beautify - Beautify HTML, CSS, JavaScript, PHP, Python, Ruby, Java, C, C++, C#, Objective-C, CoffeeScript, TypeScript, Coldfusion, SQL, and more in Atom editor.
• Prettier - An opinionated code formatter for JavaScript, Flow, TypeScript, Vue, JSON, CSS, Less, SCSS, GraphQL, and Markdown
• Uncrustify - Beautifier for C, C++, C#, ObjectiveC, D, Java, Pawn and VALA.
• Unibeautify - Universal code beautifier with a GitHub app. Supports HTML, CSS, JavaScript, TypeScript, JSX, Vue, C++, Go, Objective-C, Java, Python, PHP, GraphQL, Markdown, and more.
• clang-format - Automatic formatting for C, C++, Java, JavaScript, ObjectiveC and Protobuf.

Language Specific

C/C++

• BCPP - indents C/C++ source programs, replacing tabs with spaces or the reverse.
• GNU Indent - Unix utility that reformats C and C++ code in a user-defined indent style and coding style. GNU style is used by default.
• GreatCode - C/C++ source code beautifier that is now fully open source.

Cobol

• Cobol Beautifier - Parses your program just like a real Cobol compiler and then it generates Cobol code from the resulting Cobol Program Tree.

CSS

• CSSTidy - Opensource CSS parser and optimiser available as executeable file which can be controlled by command line and as PHP script.

Fortran

• Fortran 90 PPR - Fortran 90 preprocessor and formatter written in Fortran 90.

Haskell

• hindent - Extensible Haskell pretty printer available both as a library and an executable.

HTML

• HTB - Command-line utility to reformat HTML/XML/XSLT source code with an array of user specified options.
• Tidy - Free-standing C library

Java

• Google Java Format - google-java-format is a program that reformats Java source code to comply with Google Java Style.
• JALOPY - Source code formatting tool for the Sun Java Programming Language.
• Jindent - Commercial source code formatter for the programming languages Java, C and C++

JavaScript

• beautifier.io - Online JavaScript Beautifier

JSP

• JSPPP - Indentor for JSP files in various styles.

.NET

• NArrange - Code beautifier that automatically organizes code members and elements within .NET classes.

Perl

• PerlTidy - Perl script which indents and reformats Perl scripts.

PHP

• PHP_Beautifier - Beautifier for PHP
• phpCB - Tool available as a GUI, command line and an integrated tool of PHPEdit.
• phpStylist - Formatter with customizable options.

PL/SQL

• Pl/Sql tidy - Program to tidy, beautify or format Pl/Sql code in a batch file or Dos prompt.
• Poor Man's T-SQL Formatter - .Net 2.0 library with demo UI, command-line bulk formatter, SSMS/Visual Studio add-in, notepad++ plugin, winmerge plugin, and web service for reformatting and coloring T-SQL code to the user's preferences.

Python

• black - The uncompromising Python code formatter
• pindent - Adds comments when blocks are closed, or can properly indent code if comments are put in.
• yapf - A formatter for Python files.

Ruby

• Ruby Script Beautifier - Beautifier written in Ruby.

Shell

• ShellIndent - Indent formatting program for .sh scripts.

VBS

• VBSBeautifier - Beautifier for ASP and clientside VBScript files.

XML

• XML Indent - XML stream reformatter written in ANSI C.