Three simple steps
How to use this tool?
This free online converter translates COBOL source code into Janet in three simple steps.
- Step 1
Add your COBOL code
Type, paste, or upload the COBOL code you want to translate.
- Step 2
Convert the code
Click Convert to translate the source code into Janet.
- Step 3
Review the result
Review, copy, or download the resulting Janet code from the output editor.
Language comparison
Key differences between COBOL and Janet
| Characteristic | COBOL | Janet |
|---|---|---|
| Syntax | English-like, verbose, designed for readability and business logic. | Concise, Lisp-like with s-expressions, designed for scripting and embedding. |
| Paradigm | Procedural, imperative, with some support for structured programming. | Multi-paradigm: functional, imperative, and metaprogramming (macros). |
| Typing | Static typing with explicit data declarations. | Dynamically typed. |
| Performance | High performance for batch and transaction processing on mainframes. | Good performance for scripting and embedding, but not optimized for heavy computation. |
| Libraries and frameworks | Limited modern libraries; mostly legacy business and financial libraries. | Growing but small standard library; some third-party modules, especially for scripting and embedding. |
| Community and support | Large legacy community, strong enterprise and vendor support, but aging. | Small, active open-source community, mostly hobbyists and enthusiasts. |
| Learning curve | Steep for modern developers due to outdated paradigms and verbosity. | Moderate, especially for those familiar with Lisp-like languages; concise syntax can be unfamiliar. |
Common questions
Frequently Asked Questions
How do I convert COBOL to Janet?
Paste your COBOL code into the input box, confirm the languages are set to COBOL and Janet, and click Convert. CodeConvert AI analyzes your COBOL code and generates equivalent Janet code in seconds, preserving the original logic and structure.
What are the main differences between COBOL and Janet?
COBOL and Janet differ in syntax, type system, standard libraries, and common idioms, so copying code line for line usually will not compile. The converter maps each COBOL construct to its closest Janet equivalent. See the comparison table below for the key differences between COBOL and Janet.
Is the converted Janet code accurate?
The AI produces high-quality Janet code that preserves the behavior of your original COBOL code and follows Janet conventions. It handles common patterns, data structures, and idioms for both COBOL and Janet. For large or performance-critical code, review and test the Janet output before using it in production.
Can I convert an entire COBOL project to Janet?
You can convert COBOL files one at a time by pasting each file's code. For a full migration, convert each file and then review how classes, dependencies, and project structure map from COBOL to Janet. Signing in for free raises the input limit to 25,000 characters per conversion for larger files.
Can I convert Janet back to COBOL?
Yes. CodeConvert AI converts in both directions, so you can convert Janet to COBOL just as easily using our Janet to COBOL converter. Try the Janet to COBOL Converter
Is the COBOL to Janet converter free, and do I need to install anything?
Yes, it is free and runs in your browser with nothing to install and no IDE extension required. You can convert COBOL to Janet without an account for up to 2 conversions per day. Sign in for free for higher limits.
What are the benefits of signing in?
Signing in unlocks CodeConvert AI's Pro converter with more powerful AI models, a built-in chat assistant, code execution, saved conversion history, and personal notes. Every free account includes 5 credits and supports up to 25,000 characters of input per conversion, with no credit card required.
More free tools