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The technical file is parsed in your browser, not uploaded to DropSee.
Free STL viewer. Nothing to install.
Open binary or ASCII STL files in seconds. Rotate, zoom, inspect dimensions and mesh statistics, switch to wireframe and save a preview.
Drop your STL file here
or choose it from your device. Your file is never sent to our server.
Up to 100 MB · processed on your device
No uploadYour file bytes stay on your device.
No accountNo project setup or model storage.
FreeNo subscription required.
Built for the fast check most people actually need.
Confirm that the file opens, inspect its shape and basic geometry, and move on without installing a full technical application.
Fast inspection
Dimensions, mesh statistics and a 3D preview appear after loading.
Focused scope
No editor UI, project setup or account wall.
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Frequently asked questions
Can I open an STL file without installing software?
Yes. Choose or drag an STL file into the viewer and the geometry is rendered in your browser.
Is my STL uploaded?
No. The selected STL stays on your device while DropSee displays it.
Does it support binary and ASCII STL?
Yes. Both common STL encodings are supported.
Can I edit the STL here?
No. You can inspect the file here; editing is not supported.
What do the dimensions mean?
They are axis-aligned bounding-box dimensions in file coordinates. STL usually does not contain a dependable unit declaration.