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Uncrustify

Uncrustify is a free, open-source source code formatter for C, C++, C#, Objective-C, D, Java, Pawn, and Vala.

Place
#12 of 34
Score
6.3
Uncrustify's website

What Uncrustify is

Uncrustify is a free, open-source source code formatter for C, C++, C#, Objective-C, D, Java, Pawn, and Vala. It can adjust spacing, indentation, alignment, and braces, reformat comments, and handle embedded SQL statements. Version 0.83.0 has 901 configurable options for controlling formatting. The command-line program accepts configuration and input files, can process multiple files, and writes formatted output to a file or standard output. The project provides source code and precompiled Windows binaries through its releases. It supports Linux, OS X, and Windows, with CMake build guidance for UNIX-like systems. Resources linked by the project include Vim usage guidance, an IntelliJ plugin, a web configuration tool, and a Mac OS X utility and documentation browser. The repository identifies the license as GPL-2.0. The project directs bug reports to GitHub Issues and welcomes patches. Its README cautions that the application has bugs and recommends reviewing output before applying formatting to a whole codebase. It also says contributors are needed to test Java and Objective-C support and embedded SQL behavior.

Good

  • Formats eight listed programming languages.
  • Version 0.83.0 offers 901 configurable options.
  • Can process multiple files from the command line.
  • Project links Vim guidance and an IntelliJ plugin.

Watch out

  • The README warns that the application has bugs.
  • Java and Objective-C support need more testing.
  • Embedded SQL behavior also needs contributor testing.

Who it suits

Uncrustify suits developers who want configurable command-line formatting across its listed languages and platforms. It may also fit users of Vim or IntelliJ who want to consult the project's editor resources.

Verdict

Uncrustify offers broad language coverage and detailed formatting configuration, with command-line and editor resources. Its own README advises checking results before applying formatting across a codebase.

Plans and prices

From Uncrustify's own pricing page, checked 8 Oct 2026.

All about pricing
PlanPriceWhat it gives you
UncrustifyFreeGPL-2.0 licensed source code formatter

The facts

Each one read from Uncrustify's own pages, with the date it was checked.

What it does

Build
The README documents building from source with CMake on UNIX-like systems and describes build options for other systems.checked 8 Oct 2026
Command line
The program accepts configuration and input files, can write formatted output to a file or standard output, and can process multiple files.checked 8 Oct 2026
Community support
The project directs users to GitHub Issues for bug reports and welcomes patches.checked 8 Oct 2026
Configuration
Version 0.83.0 has 901 configurable options.checked 8 Oct 2026
Configuration tools
The README lists a web configuration tool based on Uncrustify’s Emscripten interface and a Mac OS X utility and documentation browser.checked 8 Oct 2026
Distribution
The project provides source code and precompiled Windows binaries through its releases page.checked 8 Oct 2026
Downloads
The README says precompiled Windows binaries are available from GitHub Releases or SourceForge.checked 8 Oct 2026
Editor integrations
The README links usage guidance for Vim and an Uncrustify plugin for IntelliJ.checked 8 Oct 2026
Embedded SQL
The project says it supports embedded SQL EXEC SQL statements.checked 8 Oct 2026
Formatting features
It can adjust spacing, indentation, alignment and braces, reformat comments, and handle embedded SQL.checked 8 Oct 2026
Integrations
The README links usage guidance for Vim and an Uncrustify plugin for IntelliJ.checked 8 Oct 2026
Known limitation
The README warns that the application has bugs and recommends checking results before applying it to an entire codebase.checked 8 Oct 2026
Language support caveat
The project says it needs contributors to test Java and Objective-C support and Embedded SQL behavior.checked 8 Oct 2026
License
The repository identifies its license as GPL-2.0.checked 8 Oct 2026
Purpose
Uncrustify is a source code beautifier for C, C++, C#, Objective-C, D, Java, Pawn and Vala.checked 8 Oct 2026
Support
The project directs bug reports to its GitHub issue tracker and welcomes patches through pull requests.checked 8 Oct 2026

Where it runs

Platforms
The project lists Linux, QNX, OS X, BSD variants, Solaris 9 and Windows among operating systems it has tested.checked 8 Oct 2026

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