Code Simplifier

Code Simplifier analyzes your code for unnecessary complexity and rewrites it into cleaner, more readable alternatives — without changing what it does.

How it works

Paste or reference a file and Code Simplifier runs a complexity analysis: cyclomatic complexity, nesting depth, function length, and readability heuristics. It flags the worst offenders and proposes concrete rewrites with explanations of why the original was hard to follow.

Behavior preservation

Every rewrite is accompanied by a side-by-side diff and an explanation of the logical equivalence. For functions with complex branching, it traces the execution paths through both versions to prove they produce identical results.

Language support

Code Simplifier understands idioms across Python, TypeScript, JavaScript, Go, Rust, Java, C#, and Ruby. It doesn’t just simplify logic — it rewrites to idiomatic patterns for each language, so a Python rewrite uses list comprehensions where appropriate, and a Go rewrite respects error-return conventions.

With 294,000+ installs, it’s a staple tool for teams doing code reviews and legacy cleanup.

Features

Complexity detection

Identifies high-cyclomatic-complexity functions, deep nesting, and unnecessary abstractions automatically.

Behavior-preserving rewrites

Simplifies logic while maintaining identical runtime behavior — verified through side-by-side diff.

Multi-language support

Covers Python, TypeScript/JavaScript, Go, Rust, Java, C#, and Ruby with language-idiomatic output.

Inline explanations

Explains what made the original complex and why the rewritten version is clearer.

Install