Change Your Game Window Size In-Game

Access the Window Size Settings

Open Minecraft and load into a world or stay at the main menu. Press Esc to open the pause menu (or access Settings from the main menu), then navigate to Options.

Look for a new slider labeled for window dimensions or size adjustment. This slider has been added by Window Size Mod and appears alongside your other video settings.

Adjust and Apply

Drag the slider to your desired window size. The mod supports a range of preset or custom dimensions for your non-fullscreen window. As you move the slider, you should see a preview or immediate feedback of the change.

Once you've found a size that suits your monitor and preferences, close the settings menu. Your new window size will be applied immediately and saved automatically to your game configuration.

Verify the Change

Your Minecraft window should now resize to match your selection. The change persists across game sessions—you won't need to adjust it again unless you want a different size later.

If you're in fullscreen mode, switch to windowed mode first. This mod only affects non-fullscreen windows.