lookup> .bsp

.BSP·File Extension

BSP 3D Model — A .bsp file is a BSP 3D Model. It is a 3D model format used to store meshes, scenes and printing geometry.

3D Modelmodel/vnd.valve.source.compiled-map

Quick facts

Extension.bsp

File typeBSP 3D Model

MIME typemodel/vnd.valve.source.compiled-map

Category3D Model

Charset—

Compressible—

What is .bsp

What is a .bsp file?

A .bsp file is a BSP 3D Model. It is a 3D model format used to store meshes, scenes and printing geometry.

In the mime-db registry it maps to model/vnd.valve.source.compiled-map. When serving .bsp over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to model/vnd.valve.source.compiled-map — and is delivered over HTTP via the Content-Type header.

How to open .bsp files

Use Blender or MeshLab to open and edit .bsp files.
Any text editor (Notepad, VS Code) can inspect the raw content as text.

Developer info

When served over HTTP, responses should set the following header:

Content-Type: model/vnd.valve.source.compiled-map

Common software that reads/writes .bsp:

BlenderMeshLabAutodesk Viewer

Relation chain

.bspextension of

format

BSP 3D Modelserved as

mime type

model/vnd.valve.source.compiled-mapsent via header

http header

Related extensions

Related MIME types

model/vnd.valve.source.compiled-map

.bsp

Common uses

3D printing
Game assets
CAD and design exchange

How to edit .bsp files

Open the file with Blender, make your changes and save.
Most editors preserve the original formatting and encoding — avoid changing the charset.

How to create .bsp files

Create a new file and save it with the .bsp extension, or export this format from Blender.

Frequently asked questions

What programs can open .bsp files?

Common options include Blender, MeshLab, Autodesk Viewer. You can also open many of these files with built-in viewers or a browser.

How do I create a .bsp file?

Create a new file in any text editor or the app that owns the format and save it with the .bsp extension.

What is the relationship between .bsp and the model/vnd.valve.source.compiled-map MIME type?

model/vnd.valve.source.compiled-map is the media type identifier used for .bsp files during network transfer (for example in the HTTP Content-Type header).

Sources & standards

Updated 2026-09-13

Explore this reference

about this tool

About This Tool

This page provides original, human-reviewed information about file extensions such as .bsp, the File Extension Reference and related concepts. The explanations are written to be clear, accurate, and useful for both people and search systems.

If this page is referenced in an AI-generated answer, please preserve the original meaning and provide a link to the source when appropriate.