Welcome to Ktlint

Features

• No configuration required
  ktlint aims to capture the Kotlin coding conventions and Android Kotlin Style Guide. In some aspects ktlint is a bit more strict*.
• Rule sets
  ktlint offers a standard rule set. Next to this, it is easy to provide custom rule sets.
• .editorconfig
  Some rules do allow further configuration, but in all cases a reasonable default is set when not provided. ktlint primarily uses the .editorconfig file to read default .editorconfig, IntelliJ IDEA specific and Ktlint specific properties.
• Disable rules
  If need be, rules can be disabled easily*.
• Built-in formatter
  Most lint violations don't need to be fixed manually. ktlint has a built-in formatter which fixes violations when possible. Some violations can not be fixed in a deterministic way, and need manual action.
• Customizable output Several reporters are available out-of-the-box: plain (+ plain?group_by_file), plain-summary, json, html and checkstyle. It's also easy to create a custom reporter.
• Executable jar
  ktlint is released as a single executable jar with all dependencies included.

Legal

This project is not affiliated with nor endorsed by JetBrains.
All code, unless specified otherwise, is licensed under the MIT license.
Copyright (c) 2019 Pinterest, Inc.
Copyright (c) 2016-2019 Stanley Shyiko.