IDEs

CLion

CLion is a C and C++ integrated development environment that understands templates and modern language features, drives CMake and other build systems, and bundles a GDB and LLDB debugger alongside sanitizers, Valgrind, and embedded toolchain support.

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✓ Software download·Commercial·Updated October 1, 2026
DeveloperJetBrains s.r.o.
LicenseCommercial
File size1.6 GB
Languageen-US
Downloads10

What CLion Brings to C and C++ Projects

CLion is an IDE for C and C++, built around a language engine that resolves templates, constexpr code, and features from recent standards rather than treating the source as text. Open a CMake, Makefile, or Bazel project and it configures itself around the existing build, providing completion, navigation, and inspections that follow the real dependency graph. The editor flags unreachable code, dangling pointers, and null dereferences before compilation, and the bundled debugger supports breakpoints, memory views, disassembly, and core dumps. Sanitizers and Valgrind can be launched from the same window. Embedded and remote toolchains are configured the same way as a local one.

CLion suits teams maintaining long-lived C or C++ code, where a change in a header can ripple through hundreds of translation units and a missed include breaks the build an hour later. Firmware engineers use the embedded toolchain and on-chip debugging support, cross-platform teams switch between local, container, and remote toolchains without changing workflow, and game or desktop developers lean on refactoring that understands the whole project. Newcomers benefit from run configurations that replace hand-written build commands. It works on compiled code and build systems, so diagnosing an HTTP exchange between two services calls for something like Progress Telerik Fiddler Classic instead.

Benefits of Using CLion

CLion pays off in the time it removes from the compile-and-pray cycle. Problems that would otherwise appear as a linker error or a segmentation fault are flagged while the code is being written, and the debugger, sanitizers, and Valgrind turn a crash into a readable trail instead of a guess. Refactorings are applied with knowledge of headers, declarations, and usages, which is what makes large-scale renaming in C++ feel safe rather than reckless. The build system is not a separate concern either: run configurations, toolchains, and test targets are managed in the same window, so a developer spends the day writing code rather than maintaining scripts. Embedded and remote setups work the same way, which keeps a single workflow across very different targets. That consistency is why teams keep it installed on every machine.

CLion features

Key capabilities and highlights.

Feature 1

Deep C and C++ Language Support

CLion understands templates, constexpr evaluation, and recent language standards in its completion, navigation, and analysis rather than pattern-matching the text. Inferred types and inline documentation appear as the code is read, which helps when picking up an unfamiliar library or a heavy template codebase.

Feature 2

CMake, Bazel, and Makefile Integration

The project model is built from the actual build files, so targets, configurations, and dependencies appear as first-class objects. Adding a source file or changing a build option updates the model instead of leaving the project configuration stale.

Feature 3

GDB and LLDB Debugger

Breakpoints, conditional breakpoints, watches, memory and disassembly views, and variable inspection are available without leaving the IDE. Processes can be attached to, core dumps loaded, and even build scripts debugged, which covers the usual ways a native program fails.

Feature 4

Static Analysis and Data Flow Checks

Data flow analysis and Clang-Tidy style checks look for unused or unreachable code, dangling pointers, and possible null dereferences as the file is edited. Each finding comes with a quick-fix, so correcting a class of bug becomes routine.

Feature 5

Sanitizers and Valgrind

Runtime error detectors can be run from the IDE, with results mapped back to the source line that triggered them. Memory leaks, buffer overruns, and racing accesses therefore stop being mysteries that only appear in production builds that nobody can reproduce locally.

Feature 6

Unit Testing and Coverage

CLion recognizes Google Test, Catch2, and Boost.Test projects automatically, with a test runner tree, per-test results, and coverage highlighting. Writing a test next to the function it checks takes a keystroke rather than a new project layout.

Feature 7

Remote, Container, and WSL Toolchains

A toolchain can live on a remote host, inside a container, or in a local subsystem, with the IDE synchronizing sources and running the compiler where the environment actually exists. That avoids reproducing an entire build environment on a laptop.

Feature 8

Embedded Toolchain and On-Chip Debugging

GCC ARM, IAR, and custom toolchains are supported, with GDB server integration for on-chip debugging and views for memory, disassembly, and peripherals. Framework support for PlatformIO, STM32CubeMX, Zephyr, and FreeRTOS shortens the setup before real work starts.

Old versions

Browse historical releases and previous builds.

2026.2.1August 5, 2026
2026.2.0.1July 23, 2026
2026.2July 16, 2026
2026.1.4July 2, 2026
2026.1.3June 9, 2026
2026.1.2May 18, 2026

Frequently asked questions

Common questions about CLion.

What is CLion used for?

It is an IDE for C and C++ development, used to write, navigate, refactor, debug, and test native code. It manages the build system, provides static analysis, and includes tooling for embedded targets, containers, and remote hosts.

Which build systems does CLion support?

CMake is supported as a first-class project model, and Makefiles, Bazel, Meson, and Zephyr builds are also handled. The IDE reads the existing build files, so projects usually open without being restructured first.

Does CLion include a debugger?

Yes. GDB and LLDB are supported out of the box, with breakpoints, conditional breakpoints, watches, memory and disassembly views, and variable inspection. Attaching to a running process, loading a core dump, and debugging build scripts are also covered.

Can it run tests and check for memory errors?

Google Test, Catch2, and Boost.Test suites can be run from a dedicated tree with coverage highlighting, and runtime tools such as Google Sanitizers and Valgrind can be launched from the IDE to catch leaks, overruns, and race conditions.

Is CLion suitable for embedded development?

Yes. It supports common embedded toolchains and GDB server debugging with memory, disassembly, and peripheral views, plus framework integrations for platforms such as STM32CubeMX, PlatformIO, Zephyr, and FreeRTOS.

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CLion is a C and C++ integrated development environment that understands templates and modern language features, drives CMake and other build systems, and bundles a GDB and LLDB debugger alongside sanitizers, Valgrind, and embedded toolchain support.