Build Blueprint Preview

See it before you place it.
Check a block’s position, shape and direction before placing it.

Broad Minecraft version support — from 1.20 through 26.3.
Fabric · Client-side · No server installation required

Check the shape and direction before you place the block.

Compare the preview with the placed block

The same stair after placement, shown from the same viewpoint.

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Choose your preview style

Pick the style that feels clearest while you build:

• Outline — a clean edge around the block you are about to place.
• Blueprint — a translucent shape that is easy to line up.
• Model — a preview using the block’s model and textures.

Preview stairs, slabs, doors, beds and chests before placing them. Offhand placement previews are supported, too.

Choose a preset, then fine-tune the individual preview layers.

Make the preview yours

Adjust outline and fill colors separately, and set the opacity of each preview layer. The live style sample helps you see your changes as you make them.

Find a look that is comfortable for your world and your building style.

Prefer a quieter view? Show previews only for directional blocks. You can also choose the startup state, remember your preview toggle, or enable local placement hints.

View startup and behavior settings

Changes apply immediately and are saved when you close settings. Use Restore defaults whenever you want to start fresh.

Two keys to get started

• B — turn the placement preview on or off.
• N — open settings.

Press B once to toggle the preview; there is no need to hold it. The preview starts off by default. Both shortcuts can be changed in Minecraft’s Controls menu.

Install & play

1. Choose one mod file that matches your Minecraft version from the Versions page.
2. Install Fabric Loader and Fabric API for the same Minecraft version.
3. Put the mod JAR and Fabric API JAR in your mods folder, then launch the game.

Mod Menu is optional. You can open this mod’s settings with N without it.

Supported Minecraft versions and Java requirements

Supported releases: 1.20–1.20.6, 1.21–1.21.11, 26.1, 26.1.1, 26.1.2, 26.2 and 26.3.

• Minecraft 1.20–1.20.4: Java 17
• Minecraft 1.20.5–1.21.11: Java 21
• Minecraft 26.x: Java 25

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Screenshots show Build Blueprint Preview 1.1.2 running on Minecraft 26.3.

The preview is a client-side prediction. Server placement rules may produce a different result.