Products > CobolCloud compiler Suite ®
CobolCloud Compiler Suite®
CobolCloud is an advanced COBOL compiler built on a managed open source model. It preserves applications exactly as they were written, reproducing their runtime behaviors, while its multi-directional API prepares them to integrate seamlessly with modern platforms and tomorrow’s technologies
A Multi-Directional API
The CobolCloud Compiler Suite was not designed as a conventional compiler, but as a true multi-directional API. On one side, it preserves applications by compiling COBOL exactly as written, ensuring compatibility and continuity. On the other, it opens those same applications to the technologies that matter today — and the ones that will matter tomorrow. With this architecture, a COBOL module can, with minimal adjustment, be exposed as a web service, encapsulated in a container, or orchestrated in Kubernetes or OpenShift — without being rewritten or distorted.
More importantly, this approach ensures that whenever a new technology emerges, CobolCloud can provide another 'exit' toward it, keeping COBOL relevant again and again.
If an application works and its business rules are sound, there is no reason to replace or rewrite it. Instead, CobolCloud extends it — preserving the hidden business logic embedded in COBOL modules, which represents the true know-how and value of the enterprise.
Compile Without Modification
CobolCloud is designed to preserve mission-critical COBOL applications. Programs can be compiled without changes to the source code while maintaining the runtime behaviors on which they rely. This ensures that applications remain recognizable to development teams after migration, avoiding unnecessary disruption and resistance.
Resolving COBOL Dialects
For decades, COBOL dialects have diverged, often with proprietary behaviors that complicate migration. CobolCloud unifies these variations under a single compiler, eliminating incompatibilities and ensuring equal access to modern technologies.
Over 30 Years of COBOL Expertise — and Decades of Compiler Leadership
CobolCloud builds on more than three decades of COBOL modernization and migration experience, culminating in nearly two decades of continuous compiler innovation — from the COBOL-IT fork of OpenCOBOL in 2008 to the foundation of CobolCloud in 2022. This long-standing expertise, combining field experience and advanced compiler engineering, makes CobolCloud a proven and reliable foundation for enterprise systems.
Flags and Compatibility Controls
CobolCloud supports over 200 compiler flags and runtime environment variables, allowing fine-grained control of dialect behaviors. More than 100 refinements ensure deep compatibility with Micro Focus, while significant adjustments also cover the main IBM dialects, BS2000, RMCOBOL, and others. This breadth of compatibility ensures COBOL applications can be preserved and migrated with confidence.
Transpiler Architecture
The CobolCloud compiler is a transpiler: COBOL code is translated into C, then compiled into optimized executables using the host C compiler. This process is fully transparent to developers, who continue working in COBOL while benefiting from the performance and portability of modern C compilers.
By delegating binary generation to the host C compiler, CobolCloud leverages decades of vendor optimization. The result is a compact, coherent, and high-performance solution that naturally aligns with operating systems and modern toolchains. This architecture also accelerates evolution: syntax refinements and new features can be delivered quickly, reducing migration times, accelerating time to market, and improving return on investment.
Build for Modern Environments
The Cloud is now the natural target for most enterprise modernization strategies. CobolCloud ensures COBOL applications integrate smoothly into this world:
- Applications can be containerized and orchestrated with Kubernetes.
- CI/CD pipelines can include COBOL modules alongside other languages.
- Runtime information can be exposed to modern monitoring and logging frameworks.
Advanced Features
Beyond the standard capabilities of a modern COBOL compiler — including full support for the EBCDIC character set — the CobolCloud Compiler Suite provides advanced tools for reliability and optimization:
- Advanced debugging with process attach and mixed COBOL/C/Java source navigation.
- Profiling and Code Coverage to analyze execution paths and improve performance.
- Checkpoint/Reload to save and restore runtime sessions.
- Automated runtime dump capture for faster problem resolution.
- Integration hooks to connect runtime behavior with external monitoring systems.
These features give teams greater visibility and control, reducing downtime and ensuring smoother evolution of mission-critical systems.
Conclusion
The CobolCloud Compiler Suite is a proven, enterprise-grade toolchain that combines backward compatibility with forward integration. Its modular design and nearly two decades of migration expertise make it a solid foundation for running, preserving, and evolving COBOL applications in today’s and tomorrow’s environments.
Explore Further
Talk to a CobolCloud expert. Discover how the Compiler Suite preserves your COBOL logic and extends it to modern architectures — with freedom, precision, and no rewrites.
