BLEND Converter
FileFlip converts BLEND files into 14 other formats entirely inside your browser, using Assimp compiled to WebAssembly. The BLEND file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. There is no file-size limit and no account to create.
How do I convert a BLEND file?#
- Drop your BLEND file onto the converter at the top of this page, or click it to pick one from your computer.
- Choose the format you want out of it. FileFlip downloads the engine that conversion needs, once, and your browser caches it.
- Conversion starts the moment you pick the format, and the result is yours to download. The work happens in this tab, so nothing is uploaded and nothing is queued.
Is it safe to convert BLEND files online?#
Yes, because nothing is uploaded. FileFlip converts BLEND files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What happens to a BLEND file#
FileFlip converts BLEND into 14 formats with Assimp, all of it inside the browser tab. Each conversion below names the engine it uses, what it downloads, and exactly what that conversion keeps or drops.
| Category | 3D Models |
|---|---|
| File extension | .blend |
| FileFlip support | Read only, so it is a source rather than a target |
| Conversions available | 14 |
| Engines | Assimp |
| Downloaded to your browser | 11.2 MB on the first conversion, then cached |
What is a BLEND file?#
A BLEND file is a direct save of Blender's internal memory structures, undocumented outside Blender's own source, carrying an entire application state, scenes, objects, materials, node graphs and interface layout, rather than a portable description of a single mesh.
Keep a project as BLEND for as long as it's being edited in Blender, since it's the only format that preserves every part of the scene.
Convert BLEND to glTF, FBX or OBJ the moment the model needs to leave Blender for another engine or tool.
The BLEND file format reference covers the specification, the programs that open one, and what each conversion keeps or drops.
BLEND questions people ask#
What programs can open a BLEND file?
Blender itself is the only application that reliably opens a BLEND file, since the format is a direct save of Blender's own internal memory structures rather than a documented interchange format. Other 3D software that claims BLEND support usually only reads the geometry and basic scene structure.
Why can't other 3D software open BLEND files properly?
BLEND has no public specification; it's effectively a dump of whatever data structures that version of Blender happened to have in memory. Assimp's own maintainers describe their BLEND support as deprecated for exactly this reason, calling it too time-consuming to maintain an undocumented format with far more in it than a typical importer needs.
Is a BLEND file just a 3D model?
No, a BLEND file stores an entire Blender project: every scene, object, material, texture, node setup and even the interface layout, not just a mesh. That's why converting a BLEND to a format like OBJ or glTF is lossy, since those formats only have room for the geometry, materials and animation.
Can I compress a BLEND file?
Yes, Blender has a built-in option to save a BLEND file with gzip compression, which shrinks it losslessly. It's off by default, and the tradeoff is slightly slower saving and loading in exchange for the smaller file.