Uprintf a universal stb-style printf implementation for C (no OS)

In plain words

Uprintf is a single-header C library providing a portable printf implementation for embedded and kernel development. It requires no external dependencies or dynamic memory allocation and supports standard format specifiers including floats, width, precision, and custom handlers. The library is configurable, allowing developers to disable features like floating-point support as needed, and works across bare metal and desktop environments. It is MIT licensed and available on GitHub.

written from the facts on this page · September 2026

From the sources

In the maker’s words, at launch

I've been frustrated by the lack of a truly portable, no-dependency printf for embedded and kernel development. Most solutions are either too bloated or missing key features. So I built Uprintf. It's a single-header library that gives you full printf (flags, width, precision, floats, even custom specifiers) from bare…

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