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Uncrustify

Uncrustify is a free, open-source desktop app for Windows. Here is an example configuration file, and here is a before and after C source example. It has 3,071 GitHub stars and is released under the GPL-2.0 license. Its source code is on GitHub at uncrustify/uncrustify.

github.com/uncrustify/uncrustify (opens in a new tab)

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About Uncrustify

Here is an example configuration file, and here is a before and after C source example. That should give you a pretty good idea of what Uncrustify can do.

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FAQ

Uncrustify FAQ

Still curious? Email info@appsgit.com.

Is Uncrustify free and open source?

Yes. Uncrustify's source code is public on GitHub under the GPL-2.0 license, which is OSI-approved or FSF-free, so you can use, copy and change it for free.

How do I install Uncrustify?

Download the installer for Windows from its GitHub Releases page (latest: uncrustify-0.83.0).

Is Uncrustify still maintained?

The repository's most recent commit was on Oct 20, 2026. appsgit only lists apps whose repository had a commit in the last six months.