Write, compile, and run C code online for free in the Mentrily playground. No setup required.
Run code instantly in the Mentrily playground.
The Mentrily online C compiler lets you write, compile, and run C code directly in your browser. Your program executes in a secure cloud sandbox with standard input support, so it behaves the same way it would in a local terminal — without installing a compiler, IDE, or toolchain.
It is perfect for practicing C, testing snippets, preparing for coding interviews, and classroom use. Start typing and hit Run — no account required.
Yes. The Mentrily C compiler is completely free. You can write, compile, and run C code online without creating an account or installing anything.
No. Your C code is compiled and executed in a secure cloud sandbox, so it works on any device with a browser — laptops, Chromebooks, and tablets included.
Yes. The playground supports standard input, so programs that read from stdin work the same way they would in a local terminal.
Yes. Create a free Mentrily account to keep your work, or use the built-in question builder to turn a snippet into a shareable practice problem.
Yes. Mentrily is a full teaching platform — educators can build courses and proctored exams with auto-graded C coding questions, then track learner progress in one dashboard.
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