CodeTransform
Universal Code Converter
A powerful web-based code converter that transforms code between programming languages with high accuracy and confidence scoring.
Everything you need to move code between languages
Bidirectional Conversion
Convert Python to JavaScript and back, backed by 122+ tested conversion rules.
Smart Language Detection
Auto-detects the source language straight from your code's own patterns.
File Upload
Drag & drop or click to upload — the language is picked up from the file extension.
Confidence Scoring
A color-coded accuracy indicator shows how much you should trust each conversion.
Conversion History
Recent conversions are kept locally so you can revisit or reload them anytime.
Download & Copy
One-click download with the right file extension, or copy straight to your clipboard.
Three steps, start to converted code
Upload or paste code
Drop a file in, or paste your source directly into the editor.
Choose target language
Source auto-detects; you just pick where the code should go.
Instant conversion
Get converted code with a confidence score, diff view, and warnings.
Built for Python ⇄ JavaScript today
Python and JavaScript are fully supported in both directions. File-extension recognition covers the languages below for upload and download.
Python
Full support
JavaScript
Full support
Java
Detection
TypeScript
Detection
C++
Detection
C
Detection
C#
Detection
Go
Detection
Rust
Detection
PHP
Detection
Ruby
Detection
Swift
Roadmap
A side-by-side view built for review, not guesswork
Source · Python
def total(items):
return sum(
i.price for i in items
)
Converted · JavaScript
function total(items) {
return items.reduce(
(sum, i) => sum + i.price, 0
);
}
Built to be trustworthy, not just fast
Fast
Rule-based conversion returns results in a fraction of a second.
Accurate
122+ conversion rules, plus AI validation on the result.
Privacy-first
History stays in your browser — nothing is stored on a server.
Easy to use
Paste, pick a language, convert. No setup, no build step.
Common questions
Every conversion ships with a confidence score built from structure preservation, syntax validity, and completeness, so you always know how much manual review it needs.
Python and JavaScript are fully supported for two-way conversion today. Java, TypeScript, C++, C#, Go, Rust, Ruby, and PHP are recognized for upload, download, and language detection.
Your code is sent to the converter API to be processed, but conversion history is kept locally in your browser, not on a server.
Yes — drag and drop a file or click to upload, and the source language is picked up automatically from the file extension.
Ready to convert your first file?
No sign-up, no build tools — open the converter and paste your code.
Start Converting