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Four simple steps
How to use this tool?
This free AI code fixer takes broken or non-working source code and returns the complete corrected version, with an optional error message or instruction to guide the fix.
- Step 1
Choose a language
Select the programming language of the code you want to fix.
- Step 2
Add your code
Type, paste, or upload your broken or non-working source code.
- Step 3
Add error context
Optionally include the error message, traceback, or instructions the fix should follow.
- Step 4
Fix and review
Click Fix Code, then review the corrected code as a diff or in the plain Fixed Code view.
Choosing the right tool
How is this different from the Code Checker?
The Code Checker is diagnostic-first: it gives you a list of issues to work through, with corrected code as a secondary section. The Code Fixer is solution-first: it leads with the complete working code, shown as a diff against your original, and briefly explains what changed. Use the Code Checker when you want a fuller issue-by-issue review.
Common questions
Frequently Asked Questions
How does CodeConvert AI's code fixer work?
Paste in code that's broken, throwing errors, or just not working, optionally add the error message or traceback you're seeing, and click Fix Code. The AI diagnoses the problem and returns the complete, corrected version of your code along with a plain-English summary of what it changed. No signup required.
What programming languages are supported?
Our code fixer supports over 50 programming languages including Python, JavaScript, TypeScript, Java, C++, C#, Go, Rust, Ruby, PHP, Swift, Kotlin, R, Lua, and many more.
Is the code fixer free to use?
Yes. You can use the free code fixer without creating an account for up to 5 fixes per day. For more daily uses and higher input limits, sign in for free. Every account gets 5 free credits with support for up to 25,000 characters of input code per tool use.
Do I need to paste the error message too?
It's optional, but recommended. If you have an error message or traceback from running the code, pasting it into the "Error message / traceback" box helps the AI pinpoint the exact cause instead of guessing, which usually produces a more accurate fix.
How is this different from the Code Checker?
The Code Checker is diagnostic-first: it gives you a list of issues (bugs, performance, style) to read through, with the corrected code as a secondary section. The Code Fixer is solution-first: it leads with the complete working code (shown as a diff against your original) and only briefly explains what changed afterwards. Use the Fixer when you just want broken code to work; use the Checker when you want a fuller review. Try the Code Checker
Do I need to sign up to use the code fixer?
No. You can use the free code fixer without signing up or creating an account for up to 5 fixes per day. Just paste your broken code, select the language, and click Fix Code. Sign in for free to get 5 free credits with higher limits.
Can I also convert, generate, or explain code?
Yes! CodeConvert AI offers a full suite of free tools. You can convert code between 50+ languages with the Code Converter, generate code from plain-English descriptions with the Code Generator, or get step-by-step explanations with the Code Explainer. Try the Code Explainer
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 tool use. No credit card required.
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