Understand Code Like Never Before
AI-powered code explanations that illuminate your programming journey. Break down complex code in seconds.
# AI explains this code:
def fibonacci(n):
if n <= 1:
return n
else:
return fibonacci(n-1) + fibonacci(n-2)This recursive function calculates Fibonacci numbers by summing the two preceding numbers until reaching the base case of n ≤ 1.
Powerful Features
Unlock the secrets of any codebase with our advanced AI technology
Instant Explanations
Get clear, concise explanations for any code snippet in milliseconds, no matter the language.
Multi-Language Support
Works with Python, JavaScript, Java, C++, and more. We speak all the major programming languages.
Contextual Understanding
Our AI analyzes not just syntax but the actual purpose and functionality of your code.
Learning History
Save and organize your explained code snippets for future reference and learning.
How It Works
Three simple steps to code enlightenment
Paste Your Code
Copy and paste any code snippet into our interactive editor or upload entire files.
AI Analysis
Our advanced neural networks parse and understand your code's structure and purpose.
Get Insights
Receive a detailed, human-like explanation of what your code does and how it works.
Example Explanations
See how CodeLens AI demystifies complex code
# QuickSort implementation
def quicksort(arr):
if len(arr) <= 1:
return arr
pivot = arr[len(arr) // 2]
left = [x for x in arr if x < pivot]
middle = [x for x in arr if x == pivot]
right = [x for x in arr if x > pivot]
return quicksort(left) + middle + quicksort(right)Explanation:
This implements the QuickSort algorithm, which sorts an array by:
- Selecting a 'pivot' element from the middle of the array
- Partitioning the array into elements less than, equal to, and greater than the pivot
- Recursively sorting the left and right partitions
- Combining the sorted partitions with the pivot elements
// Debounce function
function debounce(func, timeout = 300) {
let timer;
return (...args) => {
clearTimeout(timer);
timer = setTimeout(() => {
func.apply(this, args);
}, timeout);
};
}Explanation:
This debounce function:
- Takes a function and delay time as inputs
- Returns a new function that delays invoking the original
- Clears any pending timeout each time it's called
- Only executes the original function after the specified delay when calls stop
Commonly used for search inputs or resize events to improve performance.
// Singleton pattern
public class Singleton {
private static Singleton instance;
private Singleton() {}
public static Singleton getInstance() {
if (instance == null) {
instance = new Singleton();
}
return instance;
}
}Explanation:
This Java class implements the Singleton pattern which:
- Has a private constructor to prevent direct instantiation
- Maintains a single static instance of itself
- Provides a public static method to access the instance
- Creates the instance only when first requested (lazy initialization)
Ensures only one instance exists throughout the application.
What Developers Say
Trusted by engineers from startups to Fortune 500 companies
CodeLens AI has dramatically reduced the time it takes for my team to onboard new engineers. Complex legacy code that used to take weeks to understand now makes sense in minutes.
As a self-taught developer, I often struggle with advanced concepts. CodeLens breaks things down in a way that finally makes sense. It's like having a senior developer looking over my shoulder.
I use CodeLens daily to document our codebase. The explanations are so accurate that we've started including them in our official documentation with minimal edits.
Try It Yourself
See CodeLens AI in action
AI Explanation
Click "Explain Code" to see how this works