Compile and run C programs in a cloud Linux workspace.
Start coding free →C is a general-purpose, procedural programming language from the 1970s that sits close to the hardware. It is compiled and statically typed, giving developers direct control over memory and system resources. C underpins operating systems, compilers, network drivers, and embedded systems. On RunCode, a Linux workspace with GCC is ready in under a minute.
Open a C workspace →C source code is saved in .c files and compiled into machine code by a compiler like GCC. Because it is statically typed, type errors surface at compile time. C is widely used in operating systems, compilers, and network drivers, and serves as a foundation for languages like C++ and Python. The language is a natural fit for developers who want to manage memory directly and understand what the hardware is doing.
OnlineCompiler.io, our code execution API, runs the C your app sends it and returns the output, exit code, CPU time and memory. Each run gets a fresh sandbox, and the first 100,000 requests a month are free.