Paste a snippet, pick the language, and get a clear line-by-line explanation — what the code does, the concepts it uses, and where it could improve. Free, no signup.
Ready to explain
Paste your code and click Explain.
Code Analysis
The AI Code Explainer takes a snippet of code and produces a plain-English breakdown of what it does. Paste in JavaScript, Python, Java, C++, SQL, or any of 17 supported languages, and you get a structured explanation with four parts: an overview of the snippet's purpose, a step-by-step walkthrough of the significant parts, the key programming concepts it relies on, and any obvious improvements worth considering.
It's built for the moment you're staring at someone else's code — or your own, six months later — and the logic isn't clicking. Instead of mentally tracing every variable and function call by hand, you get a quick read on what the code does and why it's structured that way.
The output is rendered with proper headings, lists, and code blocks (with syntax highlighting via Prism), so explanations stay readable even when they include code references back into the snippet.
Pick the language
Choose from the dropdown so the AI can use the right context.
Paste your code
A function, a class, a query — anywhere from a few lines to a few hundred.
Click Explain
You'll get an overview, breakdown, concepts, and improvement notes in seconds.
Copy if you need it
Save the explanation alongside your code, share it with a teammate, or use it as study notes.
Reading unfamiliar code. Open-source libraries, legacy code at a new job, a snippet pulled from a forum answer — getting a quick conceptual read before diving into the details saves real time.
Learning a new language. Pasting working code and seeing it broken into parts (with the concepts named) is one of the faster ways to internalise idioms in a language you're still picking up.
Code review prep. Before reviewing a teammate's PR, a quick AI walkthrough can surface the structure so your human review focuses on judgment calls rather than parsing.
Debugging from a fresh angle. When you've been staring at the same function too long, having it described back to you sometimes reveals the gap between what the code does and what you thought it did.
One honest caveat: AI explanations describe what code appears to do, not necessarily what it does at runtime. For tricky bugs, edge cases, or anything involving concurrency or specific library versions, treat the explanation as a starting hypothesis — not a verdict.
JavaScript, TypeScript, Python, Java, C#, C++, C, PHP, Ruby, Go, Rust, Swift, Kotlin, SQL, HTML, CSS, and Bash — plus an "Other" option for languages outside the list. The AI handles each language's idioms and built-ins, so an explanation of a list comprehension reads differently from an explanation of a SQL window function. If you're learning, the official docs are a good next stop after the explanation: Python, JavaScript, HTML, and CSS.
Keep snippets focused. A single function or class explains better than a whole 500-line file. Trim to the part you actually want explained.
Set the language explicitly. The dropdown matters — TypeScript is not JavaScript, C++ is not C, and the AI uses the language hint to choose vocabulary and idioms.
Include enough context for unusual references. If the code calls into a class or library defined elsewhere, a quick comment naming what it is gives the AI something to work with.
Don't paste secrets. API keys, passwords, or private connection strings shouldn't go through any cloud service. Replace them with placeholders before pasting.
Structured Output
Overview, step-by-step, concepts, improvements.
17 Languages
From Python and SQL to Rust and Swift.
Syntax Highlighting
Code blocks rendered with Prism.
Code Stats
Lines, characters, and selected language.
One-Click Copy
Grab the explanation for notes or sharing.
Free, No Signup
No account, no per-use fee, no watermark.