# Bytecode viewer

By default, IntelliJ IDEA shows you decompiled code in compiled files. If necessary, you can open the bytecode viewer for any compiled class.

Procedure: Enable the Bytecode Viewer plugin

This functionality relies on the   plugin, which  is bundled and enabled in IntelliJ IDEA   by default. If the relevant features are not available, make sure that you did not disable the plugin.

1. Press `Ctrl+Alt+S` (Windows), `⌘ Comma` (macOS), `⌘ Comma` (IntelliJ IDEA Classic (macOS)), `⌘ Comma` (macOS System Shortcuts), `Ctrl+Alt+S` (XWin), `Ctrl+Alt+S` (GNOME), `Ctrl+Alt+S` (KDE), `Ctrl+Alt+S` (Emacs), `Ctrl+Alt+S` (Sublime Text), `⌘ Comma` (Sublime Text (macOS)), `Ctrl+Alt+S` (NetBeans), `Ctrl+Alt+S` (Visual Studio), `⌘ Comma` (Visual Studio (macOS)), `Ctrl+Alt+S` (Eclipse), `⌘ Comma` (Eclipse (macOS)) to open settings and then select `Plugins`.

2. Open the Installed tab, find the Bytecode Viewer plugin, and select the checkbox next to the plugin name.

Procedure: Show bytecode for compiled files

* Open a compiled file in the editor and select `View | Show Bytecode` from the main menu.

The bytecode viewer provides basic syntax highlighting, and it shows the information in a way that is comfortable for reading.

![Compiled file opened in the bytecode viewer](https://resources.jetbrains.com.cn/help/img/idea/2026.2/bytecode-viewer.png)