Learning & code tool
AI Code Assistant: write, debug and review code with AI
Paste code or describe what you need across 12 languages, with tasks from Write and Debug to Optimize, Convert and Code Review.
Language
Task
Code or request
0 words
Result · Write
Code and a clear explanation appear here.
3 steps
How Code Assistant works
1
Pick language & task
From a quick snippet to a full code review.
2
Paste code or describe
Include errors, constraints and what “done” looks like.
3
Apply & iterate
Copy the fix, run tests locally and ask follow-ups in chat.
Capabilities
What you can do
12 languages
JS, TS, Python, Java, C#, C++, Go, Rust, PHP, Ruby, Swift, Kotlin.
Debug
Decode stack traces and get minimal, explained fixes.
Explain & review
Understand diffs and catch issues before merge.
Optimize
Improve performance with trade-offs spelled out.
Convert
Idiomatic ports between languages, not line-by-line copies.
Security-aware
Flags common vulnerabilities when it spots them.
At a glance
Specs & limits
12 in the UI selector
Languages
Write · Explain · Debug · Optimize · Convert · Review
Tasks
Paste · describe · upload
Input
You execute locally
Runs
Yes, start coding
Included on Free
FAQ
Code Assistant questions
Yes, sign up free with no credit card and start using this tool right away. Upgrade to Pro when you want premium models, advanced tools and more room to work.
It generates and explains code you run in your own environment. Full control, no black box execution required.
Treat it like a strong pair programmer: review, test and ship, especially for security-sensitive paths.
Fix your next bug faster.
Open Code Assistant in Chatday and paste your snippet.