codepen - Minecraft Block Model Viewer
GitHub (Desktop App version)

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This is a web app that loads minecraft .jar files and renders block models. It is compatible with old jars from ver 1.8 snapshot 14w25a and later, because it requires a blockstates folder, and older than that, there is no blockstates folder.
(However, if you load 14w25a.jar as the base and load the older jars as resource packs, even older versions may be available.)

Unlike the legacy style the Simple Model Renderer, it uses a more modern framework, Vue.

Resource packs and mod blocks can also be rendered.

Animated PNGs can also be saved.

codepen - Simple Model Renderer

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This is a javascript application that can render a simple cube. I created it using Three.JS.

Try loading your favorite texture. The preview model can control the camera with the mouse. Click the “Capture Image” button to convert it to a storable image.

If you use Blockbench to load a Minecraft resource model and convert it to a bbmodel file, you will be able to render models other than cube models.

codepen - Minecraft:Door renderer

Can be used to render 2 block high doors

codepen - Minecraft 3D Item OBJ/MTL Generator

It is a tool that to generate OBJ/MTL model files from the Minecraft items images in 3D like ItemEntity.

The OBJ/MTL files can be imported and used in Blender.

Minecraft Grass Colors

Stain and render minecraft grass, ferns and leaves in Javascript.

codepen - Texture Tintor

This is a tool to dye any texture image with any color.

codepen - Minecraft Bedrock: Cube model to Poly Mesh model

This tool converts Bedrock's *.geo.json model definition format. The poly_mesh formats are used rarely, but specific options are made available.

See: Bedrock Edition beta schemas documentation.

codepen - Minecraft Humanoid

A realtime render of the humanoid with Javascript.

codepen - Minecraft Panda

A realtime render of the panda with Javascript.

codepen - Minecraft Ender Dragon

This is a realtime animated rendering of the ender dragon using Javascript.

You can change the camera angle and capture the image. In addition, you can generate APNG and OBJ/MTL.

- Minecraft:Warden Renderer

You can change the camera angle and capture the image. In addition, you can generate APNG and OBJ/MTL.

codepen -Minecraft: TNT Explosion

An animation of a TNT explosion with Javascript.