#182 · Programming Language Tools Developer Tool

Kotlin Validator

Check Kotlin code for structural errors, warnings, naming issues, and safe auto-fix candidates. Processing stays in your browser.

Developer Input

Kotlin source

Kotlin Source Code

package com.example

import kotlin.collections.List
import kotlin.collections.List

fun greet(UserName: String?): String {
    val message = UserName!!
    return message
}

Validation Level

Warning Limit

issues

Check imports Check null safety Check naming Auto-run while typing

How to use this developer tool

Paste source code or load the included working example.
Choose the validation level and adjust the additional setting.
Enable only the checks or output options needed for this review.
Select Validate 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 Validator. 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 validate Kotlin code online without compiling it?

Paste Kotlin code and run structural validation to check brackets, imports, declarations, naming, and common null-safety patterns.

How do I find duplicate imports in Kotlin code?

Enable import checks. Duplicate import paths are reported with rule IDs and line locations.

Can this Kotlin validator detect unsafe double-bang operators?

Yes. It flags common uses of the Kotlin not-null assertion operator and recommends safer optional handling.

How can I check Kotlin naming conventions online?

Strict mode checks common class, function, parameter, and variable naming patterns and reports likely violations.

Does this tool replace the Kotlin compiler?

No. It performs browser-based structural and heuristic checks and should be followed by an official compiler or IDE check.

Related developer tools

TypeScript Checker TypeScript Generator TypeScript Formatter TypeScript Converter

Kotlin Validator modules

Module	Purpose
Validation Level	Adjusts rule strictness.
Null Safety	Checks common unsafe assertion patterns.
Naming Rules	Reviews Kotlin identifier conventions.

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