#184 · Programming Language Tools Developer Tool

Kotlin Inspector

Analyze Kotlin code quality, complexity, coroutine patterns, and maintainability with actionable recommendations. Processing stays in your browser.

Developer Input

Kotlin source

Kotlin Source Code

package com.example

import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.launch

class ReportService {
    fun calculateReport(items: List<Int>, includeTax: Boolean): Int {
        var total = 0
        for (item in items) {
            if (item > 0) {
                total += item
            }
        }
        GlobalScope.launch {
            println(total)
        }
        return total
    }
}

Inspection Depth

Complexity Limit

points

Check coroutines Check null safety Check code smells Auto-run while typing

How to use this developer tool

Paste source code or load the included working example.
Choose the inspection depth and adjust the additional setting.
Enable only the checks or output options needed for this review.
Select Inspect Kotlin and inspect the output, status, and measured processing time.
Copy or download the result after reviewing heuristic findings.

What this developer tool does

This tool performs browser-based structural and static analysis. It does not replace the official Kotlin or Swift compiler.

Source input → string and comment masking → token or rule analysis → structured output → statistics and recommendations.

Heuristic findings are labeled for review. Confirm production code with the official compiler, IDE, and project test suite.

Example

The loaded example is executable test input for the Kotlin Inspector. Run the tool to see its expected output and status.

Tips for better output

Use complete declarations when possible so scope and block ranges can be estimated correctly.
Keep strings and comments intact; the analyzer masks them before structural processing.
Review every automatic conversion before replacing source in a production project.
Use the official compiler for final syntax, type, dependency, and platform validation.

FAQ

How can I measure Kotlin cyclomatic complexity online?

The inspector estimates complexity from control-flow decision points such as if, when, loops, catch, and logical operators.

How do I find long Kotlin functions automatically?

Set a function-length threshold and run the inspection to list functions that exceed the selected limit.

Can this tool detect Kotlin coroutine code smells?

It flags patterns such as GlobalScope, runBlocking, nested launch calls, and async usage that may require review.

How is the Kotlin quality score calculated?

The score starts at 100 and applies visible deductions for complexity, long functions, nesting, unsafe null assertions, and other findings.

Does Kotlin Inspector perform full semantic analysis?

No. It uses browser-based structural and heuristic analysis and cannot replace compiler, detekt, or IDE inspections.

Related developer tools

TypeScript Checker TypeScript Generator TypeScript Formatter TypeScript Converter

Kotlin Inspector modules

Module	Purpose
Complexity	Estimates decision-point complexity.
Coroutines	Flags common coroutine review patterns.
Quality Score	Shows visible maintainability deductions.

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