Code issues and fixes will be displayed here.
Language overview
COBOL programming language
COBOL (Common Business-Oriented Language) is a programming language primarily used in business, finance, and administrative systems. It has been widely used in legacy systems since the 1960s. COBOL emphasizes readability and self-documenting code, making it suitable for large-scale and long-term projects. Despite its age, COBOL continues to play a crucial role in maintaining critical business applications.
Three simple steps
How to use this tool?
This free online COBOL code checker analyzes source code for bugs, performance issues, security concerns, and best-practice violations, then suggests practical fixes.
- Step 1
Add your COBOL code
Type, paste, or upload the COBOL code you want to check.
- Step 2
Run the check
Click Check Code to analyze the code and identify potential issues.
- Step 3
Review the results
Review the issues found, suggested fixes, and corrected code.
Why use the checker
How is this different from a linter?
Traditional COBOL linters check syntax and basic style against predefined rules. This AI code checker also understands your code’s logic, helping it find semantic bugs, performance problems, security concerns, and best-practice violations.
Common questions
Frequently Asked Questions
How do I check COBOL code for bugs using CodeConvert AI?
Simply paste your COBOL code into the input box and click the Check Code button. Our AI will analyze your COBOL code for bugs, performance issues, readability problems, and best-practice violations, then provide corrected code in seconds.
What kinds of issues can this tool find in COBOL code?
This tool can find a wide range of issues in COBOL code, including logic errors, off-by-one bugs, null/undefined access, type mismatches, performance bottlenecks, readability problems, deprecated API usage, security concerns, and violations of COBOL best practices.
Does it fix COBOL code or just report issues?
Both. The tool identifies each issue with a severity level and explanation, provides a code snippet showing the fix, and includes a complete corrected version of your COBOL code with all fixes applied.
How is this different from a COBOL linter?
Traditional COBOL linters check for syntax errors and basic style violations based on predefined rules. This AI code checker understands your COBOL code's logic and can find semantic bugs, suggest performance optimizations, identify security concerns, and explain issues in plain English — going far beyond what static analysis tools can detect.
Can I also convert or explain my COBOL code?
Yes! After checking your COBOL code, you can use our free Code Converter to translate it to any of 50+ other programming languages, or use the Code Explainer to get a step-by-step breakdown of how it works. Try the COBOL Code Explainer
Is the COBOL code checker free to use?
Yes. You can check COBOL code for free without creating an account for up to 2 checks per day. For more checks and higher limits, sign in for free — every account gets 5 free credits with support for up to 25,000 characters of input code per check.
Do I need to sign up to use the COBOL code checker?
No. You can use the free COBOL code checker without signing up or creating an account for up to 2 checks per day. Just paste your COBOL code and click Check Code. Sign in for free to get 5 free credits with higher limits.
What are the benefits of signing in?
Signing in unlocks CodeConvert AI's Pro tool, which includes more powerful AI models, an integrated chat assistant, code execution, personal notes, conversion history, and an enhanced interface. Every account gets 5 free credits with support for up to 25,000 characters of input code per check — no credit card required.
Explore by language
Try our Code Checkers in other languages
More free tools