ktlint

Ktlint is a Kotlin linter and formatter that enforces Kotlin coding conventions and the Android Kotlin Style Guide, with a standard rule set and optional customization via .editorconfig. It is released as a single executable jar with a built-in formatter that can automatically fix many violations, and it supports multiple output reporters (plain, plain-summary, json, html, checkstyle). The project also supports custom rule sets and integrations for extending lint rules and reporting.

AI named ktlint from December 2025 to July 2026.