#181 · Programming Language Tools Developer Tool

Kotlin Parser

Parse Kotlin source code into declarations, tokens, and a readable structure tree directly in your browser. Processing stays in your browser.

Developer Input

Kotlin source

Kotlin Source Code

package com.example

data class User(
    val id: Int,
    val name: String
)

fun greet(user: User): String {
    return "Hello, ${user.name}"
}

Parser Mode

Maximum Depth

levels

Include imports Include source locations Include token summary Auto-run while typing

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

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.

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

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.

How can I parse Kotlin classes and functions online?

Paste Kotlin source, choose a parser mode, and run the parser to extract classes, functions, properties, imports, and source ranges.

How do I extract declarations from Kotlin source code?

The parser masks strings and comments, tokenizes declarations, and builds a tree of package, type, function, and property nodes.

Can I view a Kotlin syntax tree without installing IntelliJ?

Yes. This browser tool provides a lightweight declaration tree and token view, although it is not the official Kotlin compiler AST.

How can I find Kotlin functions and properties by line number?

Enable source locations and the output will include the start line, end line, and declaration type.

Can a browser-based parser analyze Kotlin extension functions?

Yes. Common extension functions are identified by detecting receiver types before the function name.

Module	Purpose
Parser Mode	Controls which Kotlin declaration types appear.
Error Recovery	Continues after recoverable structural errors.
Token Summary	Counts lightweight parser tokens.

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