Code

Convert code between languages

Paste code in one language and get a faithful translation into another, with notes.

For the best results: Paste your full code or describe the goal clearly. Mention the language, what the output should do, and any constraints or libraries required.

AI can make mistakes. Check important information before relying on it.

FREE · PRIVATE · NO SIGN UP REQUIRED · NO ACCOUNT NEEDED

What is Code Converter?

Code Converter is a free AI coding assistant that takes code in one language and returns a faithful translation into another, with notes on the differences. Each request is handed to a code-specialized model chosen for the task, returning working code, bug fixes, and explanations in any programming language in seconds. You paste and go, with no login and nothing to install, and the code you share is not retained once the session ends.

✦Paste code and go, no login, nothing to install
✦Code-specialized models are selected per request automatically
✦Your code is not retained after the session ends

Models: It routes across strong coding models including Llama, Gemini and Mistral families, picking the best available one per request. The exact model used is shown after every response.

See it in action

A backend developer is porting a small pricing helper from a Python service into a new Go microservice and wants to know where the two languages will quietly disagree.

What you type

Convert this Python to Go: def safe_divide(a, b): if b == 0: raise ValueError("cannot divide by zero") return a / b

What you get

package pricing import "errors" func SafeDivide(a, b int) (float64, error) { if b == 0 { return 0, errors.New("cannot divide by zero") } return float64(a) / float64(b), nil } Notes on differences - Integer division: Python's / always returns a float, so 7 / 2 is 3.5. Go's / on two ints truncates to 3. Both operands are cast to float64 here to preserve the original meaning; drop the casts only if you actually want integer truncation. - Error handling: Python raises and the caller catches. Go has no exceptions, so the function returns a (float64, error) pair and every caller must check err. A raise became a returned error, not a panic.

Tip: Read the notes before the code. A syntax-only port would have written a / b on two ints and silently truncated your result, and a caller still waiting to catch a ValueError would never see one. The idiom differences, float vs integer division and returned errors vs exceptions, are where translated code passes review and then behaves wrong in production, so review those seams harder than the logic around them.

Use cases

What people use it for

Convert Java classes to Kotlin one file at a time while modernizing an Android app.

Turn a MATLAB analysis script into Python when the license lapses but the math still matters.

Port Bash deployment scripts to PowerShell so they run on the Windows servers you've inherited.

Who uses Code Converter?

Teams migrating stacks

porting a proven utility from Python to Go so they do not rewrite tested logic from a blank file

Polyglot learners

seeing how a familiar snippet looks in a language they are picking up, to map new syntax onto ideas they already know

Tutorial writers

offering the same example in several languages so readers can follow along whatever stack they use

How it works

1Paste your code or describe what you need built.
2A code-specialized model writes, fixes, or explains it.
3Copy the code out, or ask follow-ups to iterate on it.

Tips for the best results

Name both languages precisely, including versions or runtimes where they matter; ES2020 JavaScript to Python 3.11 avoids code aimed at the wrong target.
Say whether you want an idiomatic rewrite or a line-for-line port; the first reads naturally in the new language, the second stays easy to compare against the original.
Include the imports and any custom helpers the snippet relies on, so the translation can map or flag each dependency instead of inventing one.
Read the conversion notes carefully, since they flag where an exact equivalent does not exist and a human decision is needed, which is where most bugs hide.
Convert and test one module at a time rather than a whole project at once, so you can verify behavior before it compounds into the next file.

FAQ

Frequently asked questions

Will the converted code behave exactly like the original?

That's the aim, not a guarantee. Languages disagree on things like integer division, string comparison, error handling and evaluation order, and the notes call out every place where meaning couldn't map cleanly. Read the notes before the code, then test the translation against known outputs from the original, a handful of representative inputs catches most behavioral drift.

What happens when my code uses a library the target language doesn't have?

The nearest equivalent gets swapped in and the substitution is flagged in the notes. Equivalents rarely match one for one (different defaults, different edge behavior) and those seams are where translated code breaks quietly. Treat every flagged library swap as the part of the output to review and test hardest, ahead of the straightforward logic around it.

Do I get a literal translation or idiomatic code?

Idiomatic by default, a Python loop becomes a list comprehension where that's natural, a Java getter becomes a Kotlin property. If you want line-by-line correspondence so you can review the two versions side by side, ask for a literal translation instead. Asking for both, literal first and idiomatic after, is a solid way to learn the target language's habits.

How should I approach converting a whole project?

One file or function at a time, dependencies first, rather than a single enormous paste. The conversation keeps context while your tab stays open, so helpers you converted early can be referenced when the code that calls them comes through. A worked sequence produces noticeably more consistent output than dumping an entire codebase and hoping.

Can it convert across paradigms, like callback code to async/await or SQL to a dataframe library?

Restructuring conversions like these work, and the notes explain how the old shape maps to the new one. The further apart the paradigms, the more the result is a rewrite than a translation, so budget real review time. It helps to say what you care about most (exact behavior, readability, or performance) because paradigm jumps involve trade-offs a straight port doesn't.

Is this code converter free and account-free?

Yes. Paste code in one language and get a translation into another for free, with no account, sign-up or payment. There is no conversion limit behind a login. It works from the code you paste; nothing is executed, so you test the translated version yourself to confirm it behaves the same.

Which language pairs does it support?

Most mainstream combinations work, including Python, JavaScript, TypeScript, Java, C#, C++, Go, Ruby, PHP, Rust, Swift and Kotlin, in either direction. Name both the source and target language and any framework involved. The closer the two languages are in style, the cleaner the result; very different paradigms need more review afterwards.

Will it keep my comments and variable names?

Yes. By default it carries your comments across and keeps variable and function names recognizable, adjusting only for the target language naming conventions, whether camelCase or snake_case. If you would rather it rename things to fit the destination idiom, or strip comments, ask and it will follow that instruction.

What are the usage limits?

Code tools are text tools, so they are unmetered during the current free launch phase, iterate on a bug or generate as many drafts as the work needs. A short per-minute limit guards against scripted abuse only. Paid plans with higher limits and priority model access are coming soon.

Also useful