Blender project MIME Type

Learn what model/x-blend represents, how to open it, and how Poly supports this 3D format.

MIME type details for model/x-blend

In active use
MIME typemodel/x-blend
Extensions
.blend
First standardized1995
Created byBlender Foundation
Browser support
Example applicationsBlender
Poly supportYes. Poly recognizes valid Blender project files and makes supported geometry and scene metadata available.
Indexed by PolyYes. Poly indexes filenames and creates visual similarity information for supported 3D content; available metadata is shown in details.
Preview in PolyYes. Poly previews supported Blender project geometry and scene content.
Poly agentYes. An optimized rendition of the 3D object or scene is provided to the agent, allowing compact yet information-rich multimodal interaction with 3D files.

What does model/x-blend represent?

The model/x-blend media type identifies blender project files, normally stored as .blend. BLEND is Blender's native project format. It can preserve a complete authored project with objects, collections, modifiers, materials, cameras, lights, animation, and settings. It is a project file rather than a neutral interchange mesh.1

Opening and converting the format

Open the project in a compatible version of Blender. Export to GLB for interactive delivery, or use a manufacturing format when preparing a model for printing. Keep the Blender project for further authoring work.

Support in Poly

Poly previews supported geometry, makes filenames searchable, and provides visual similarity for supported 3D content. Available mesh and scene metadata can appear in details. An optimized rendition of the 3D object or scene is provided to the agent, allowing compact yet information-rich multimodal interaction with 3D files.

ConstructHandling
Objects and collectionsProject scene organization may be represented
Modifiers and materialsAuthored modifiers and procedural materials may differ across versions or previews
AnimationKeyframes and actions may be present
Poly limitationPoly's rendition is for inspection and does not promise a round-trip Blender project

Poly supports inspection and multimodal understanding; editing, simulation, and exact authoring remain application tasks.

Format context and alternatives

Blender has used its native blend format throughout the application's open-source development. The file evolves with Blender releases, so a project saved by one version may need conversion or compatibility review in another. 1 Choose glTF or GLB for interactive scene delivery, OBJ for simple mesh exchange, and 3MF for manufacturing packages when its optional metadata matches the workflow.

Footnotes

  1. Blender Foundation. Blender manual: opening and saving. 2
© Poly Corp. 2026