Dragonbox
A C++ reference implementation of the Dragonbox algorithm for fast, correct, and shortest float-to-string conversion.
What is Dragonbox?
Dragonbox is a C++ library implementing the Dragonbox algorithm, which converts binary floating-point numbers (float and double) into decimal strings. It solves the fundamental problem of `ftoa`/`dtoa` by generating the shortest, correctly rounded decimal representation that guarantees exact roundtrip parsing back to the original binary value.
C++ developers and library authors who need a fast, correct, and minimal dependency for converting floating-point numbers to strings, such as those building serialization libraries, logging systems, or data format utilities.
Developers choose Dragonbox for its proven correctness, guaranteed shortest output, and high performance, often matching or exceeding alternatives like Ryu. Its header-only core and policy-based design offer flexibility without sacrificing speed.
Overview
Reference implementation of Dragonbox in C++
Use Cases
Best For
- Implementing high-performance float-to-string conversion in C++ libraries
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