This repository contains unofficial specifications for systems related to Roblox.
There is a growing desire for third parties to interoperate with Roblox and its systems. However, at this time, Roblox does not provide documents that specify their proprietary file formats, protocols, and other related items. The purpose of this project is to provide a resource for such third parties to produce their own implementations.
It must be made clear that this project is not official, and is not affiliated with Roblox Corporation. The documents provided here are not sourced directly from Roblox, but from third-party reverse-engineering efforts.
Documents are divided into several categories.
Documents describing file formats.
| Document | Description |
|---|---|
| rbxl | Describes the binary format for place and model files. Such files often have the .rbxl or .rbxm file extensions. |
| rbxlx | Describes the XML format for place and model files. Such files often have the .rbxlx or .rbxmx file extensions. |
Certain instance properties are serialized as binary data in a specialized format. These documents describe such formats.
| Document | Description |
|---|---|
| AttributesSerialize | Describes the binary format of the Instance.AttributesSerialize property. |
| MaterialColors | Describes the binary format of the Terrain.MaterialColors property. |
| Tags | Describes the binary format of the Instance.Tags property. |