Programming language: Kotlin
License: Apache License 2.0
Tags: Tools    
Latest version: v1.9.0

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Join the chat at #detekt on KotlinLang Visit the website at detekt.github.io/detekt/ Maven Central Gradle Plugin

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Meet detekt, a static code analysis tool for the Kotlin programming language. It operates on the abstract syntax tree provided by the Kotlin compiler.

[detekt in action](docs/images/detekt_in_action.png "detekt in action")


  • Code smell analysis for your Kotlin projects
  • Complexity reports based on lines of code, cyclomatic complexity and amount of code smells
  • Highly configurable rule sets
  • Suppression of findings with Kotlin's @Suppress and Java's @SuppressWarnings annotations
  • Specification of quality gates which will break your build
  • Code Smell baseline and suppression for legacy projects
  • Gradle plugin for code analysis via Gradle builds
  • SonarQube integration
  • Extensibility by enabling incorporation of personal rule sets, FileProcessListener's and OutputReport's
  • IntelliJ integration
  • Third party integrations for Maven, Bazel and Github Actions (Docker based and Javascript based)

Project Website

Visit the project website for installation guides, release notes, migration guides, rule descriptions and configuration options.


Quick Start ...

with the command-line interface

curl -sSLO https://github.com/detekt/detekt/releases/download/v[version]/detekt-cli-[version]-all.jar
java -jar detekt-cli-[version]-all.jar --help

You can find other ways to install detekt here

with Gradle

plugins {

repositories {

detekt {
    buildUponDefaultConfig = true // preconfigure defaults
    allRules = false // activate all available (even unstable) rules.
    config = files("$projectDir/config/detekt.yml") // point to your custom config defining rules to run, overwriting default behavior
    baseline = file("$projectDir/config/baseline.xml") // a way of suppressing issues before introducing detekt

    reports {
        html.enabled = true // observe findings in your browser with structure and code snippets
        xml.enabled = true // checkstyle like format mainly for integrations like Jenkins
        txt.enabled = true // similar to the console output, contains issue signature to manually edit baseline files
        sarif.enabled = true // standardized SARIF format (https://sarifweb.azurewebsites.net/) to support integrations with Github Code Scanning

// Groovy DSL
tasks.withType(Detekt).configureEach {
    jvmTarget = "1.8"

// or

// Kotlin DSL
tasks.withType<Detekt>().configureEach {
    // Target version of the generated JVM bytecode. It is used for type resolution.
    jvmTarget = "1.8"

See maven central for releases and sonatype for snapshots.

If you want to use a SNAPSHOT version, you can find more info on this documentation page.


Gradle 6.1+ is the minimum requirement. However, the recommended versions together with the other tools recommended versions are:

Detekt Version Gradle Kotlin AGP Java Target Level JDK Max Version
1.18.0 7.0.1 1.5.21 4.2.0 1.8 16

The list of recommended versions for previous detekt version is listed here.

Adding more rule sets

detekt itself provides a wrapper over ktlint as a formatting rule set which can be easily added to the Gradle configuration:

dependencies {

Likewise custom extensions can be added to detekt.


If you contributed to detekt but your name is not in the list, please feel free to add yourself to it!


androidweekly androidweekly

As mentioned in...


Custom rules and reports from 3rd parties: