💡 Unfamiliar code? Understand it in minutes.
Paste code you didn't write. Get the big picture, an architecture map, a step-by-step walkthrough, and the gotchas — like a senior dev onboarding you.
✓ Free forever✓ No signup✓ AI brain + local proof
AI-generated — always review before shipping to production. Your input is sent to the AI service only to generate the answer. The 85 classic utilities on this site run 100% in your browser.
How it works
- Paste the code: Drop in any snippet, function, or file that is hard to follow — legacy code is the classic use case.
- Pick the language: Select the language so terminology and idioms in the explanation match your codebase.
- Read the walkthrough: The instrument breaks the code down step by step: what each part does and how the pieces fit together.
Good to know
- Explanations describe what the code appears to do — they cannot verify intent, so confirm against the original requirements.
- For very large files, explain one function or module at a time for clearer results.