Q3S Converter
FileFlip converts Q3S files into 14 other formats entirely inside your browser, using Assimp compiled to WebAssembly. The Q3S 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 Q3S file?#
- Drop your Q3S 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 Q3S files online?#
Yes, because nothing is uploaded. FileFlip converts Q3S 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 Q3S file#
FileFlip converts Q3S 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 | .q3s |
| 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 Q3S file?#
A Q3S file is Quick3D's scene format, holding multiple meshes with their materials, textures, cameras, lights and transforms, identified in the file by the signature string "quick3Ds".
There's little reason to create a new Q3S file today; it only comes up when an old Quick3D scene needs to be read.
Convert Q3S to glTF or OBJ as soon as the scene needs to open anywhere other than Quick3D itself.
The Q3S file format reference covers the specification, the programs that open one, and what each conversion keeps or drops.
Q3S questions people ask#
What is a Q3S file?
A Q3S file is a 3D scene saved by Quick3D, an older Windows application for viewing and converting 3D models. It holds multiple meshes along with their materials, cameras, lights and transforms, identified internally by the signature "quick3Ds".
What's the difference between Q3S and Q3O?
A Q3S file is a full scene with several objects, cameras and lights, while a Q3O file is Quick3D's single-object format holding just one mesh and its materials.
What software still opens Q3S files today?
Quick3D itself is no longer in active circulation, so a Q3S file today is almost always opened through a format-conversion library that has kept support for it rather than the original application.