CLion

Free for non-commercial use

The IDE for professional C and C++ development

Work with any OS, toolchain, and agent.
The choice is yours.

One place to run agents and verify their work,
with jetbrains air

Run multiple agents at once without re-explaining state or codebase context. Debugging, testing, and profiling are always one click away, and code comments go straight back to the agent for it to act on.

Explore Air

Deterministic tools for you and your agents

CLion provides you and your agents with consistent, reliable tools for C and C++ development. It helps your agents use fewer tokens and make fewer wrong turns. Agents can also step into the debugger (GDB, LLDB, or a debugger connected through DAP) to collect stack traces and variable values, so what they report back is evidence you can check. When a tricky problem needs your judgment, the same tools help you catch issues early, work it out faster, and change the code safely.

C and C++ intelligence that actually understands the language

CLion deeply understands your code – from usage and dependency resolution to accurate analysis and precise code exploration in line with the latest standards. Catch problems early, validate what you ship, and keep quality high, no matter how the code was written.

Your agents, your models, your subscriptions

Connect the agents you use and run them on your own API key, the plan you already pay for, or JetBrains AI. Switch subscriptions anytime, even during a session.

An integrated experience for every level of your stack

CLion is built for the full range of C and C++ development with the compilers and build system you already use, on Windows, Linux, and macOS – including remote development and unit testing as part of the core workflow. Whether you're working on embedded systems, firmware, or custom build targets, cross-compilation, on-chip debugging, and hardware-aware tooling are native capabilities, not add-ons.

C++

Rust

Python

CMake

Makefile

Bazel

Meson

Docker

WSL

Zephyr West

Parasoft

Lauterbach

SEGGER

Vcpkg

GCC

Clang

MSVC

Google Test

Git

C++

Rust

Python

CMake

Makefile

Bazel

Meson

Docker

WSL

Zephyr West

Parasoft

Lauterbach

SEGGER

Vcpkg

GCC

Clang

MSVC

Google Test

Git

C++

Rust

Python

CMake

Makefile

Bazel

Meson

Docker

WSL

Zephyr West

Parasoft

Lauterbach

SEGGER

Vcpkg

GCC

Clang

MSVC

Google Test

Git

Covers all your C and C++ needs

Whether you're shipping production code or writing firmware for custom hardware, CLion supports you every step of the way.

C/C++ developers

Ship with confidence, delegate tasks to agents, and verify the result on your stack and any OS.

Embedded professionals

Develop for your target hardware, debug on the device, and move between chip vendors, compilers, and AI agents without changing tools.

Learn more

Trusted by developers and teams at the companies powering the world

What developers say

90%

of managers are satisfied or very satisfied with CLion*

88%

of managers believe that CLion increases teams’ productivity*

74%

claim it took less than two weeks to adopt CLion*

78%

of developers say their productivity has increased with CLion*

* Based on the in-IDE survey conducted in Q2 2025

Ole Bøe

Senior Software Engineer at reMarkable

I prefer CLion because it’s simple, and everything works smoothly. It has the best Git client I’ve ever used, with excellent merge and change comparison functionality. Running tests from CLion is easy. I’m also happy with the ClangFormat integration.

Why reMarkable Chose CLion

Matt Godbolt

Compiler Explorer

CLion takes a lot of the toil out of C++, allowing me to concentrate on the interesting part: problem solving.

Jason Turner

C++ Weekly, CppCast,
Trainer, Consultant

CLion has been indispensable for me when refactoring large codebases. The refactoring tools and the real-time feedback in the IDE about which lines still need to be updated are excellent time savers. Each release gets better and more responsive than the last!

Prof. Dr. Rodriguez-Losada

Conan, JFrog

CLion is fantastic, finally the C++ high quality cross-platform IDE with CMake as first class build system we were waiting for.

Erkki Salonen

Software Developer

CLion’s powerful refactoring and code model that understands dependencies between items have already changed my software design process. One can dig out quite a bunch of bugs even before running the application.

Matthew Davey

dotBunny

Both of these tools (CLion and Rider) help our team on a daily basis, allowing developers to perform their tasks quickly and efficiently, all the while seamlessly integrating with numerous parts of our pipeline.

FAQ

CLion’s Quick start guide shows you how to create and run your first project and introduces the product’s core capabilities. If you are new to CLion, there is a set of interactive courses that can help you get familiar with the essential functionalities.

Moving to CLion doesn't mean rebuilding your setup. Open your existing CMake project, Makefile, or compilation database, and CLion picks up your toolchain. Coming from VS Code, CLion reads the settings in c_cpp_properties.json (and applies any changes you make to it), and you can set up code insight for custom project formats and standalone files, too. Keep your OS, your compiler, and your shortcuts with a familiar keymap.If you have a paid license for a product that competes with CLion, we will give you a 25% discount on a standard commercial or personal subscription.Follow our Quick start guide for step-by-step setup instructions.

Yes. CLion works with the agents you already use, including Codex, GitHub Copilot, Junie, Cursor, and Claude, plus any other ACP-compatible agent. JetBrains Air, now in early access, lets you run several agents in parallel and review their work in one place, right in the IDE.

No. You can use your existing agent subscriptions or BYOK, and JetBrains AI is optional if you already have it or want it.

You can try JetBrains Air at no cost with Junie Lite, JetBrains' efficient coding agent for everyday tasks. You only need to sign in with a JetBrains Account. You can also bring agents you already have, using their own subscriptions.

If you have any ideas on how to improve CLion, or if you’d like to request a specific feature, feel free to share it in our issue tracker. You can also follow us on our community forum to receive support, share your feedback, and stay in touch with the CLion community.