Are my PLY files uploaded anywhere?

No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.

Is converting PLY to STL free?

Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.

Does converting PLY to STL lose quality?

PLY and STL describe content in fundamentally different ways, so the conversion is a reconstruction rather than a copy. The result is faithful, but not byte-for-byte equivalent. Geometry only. Materials, colours, textures and animation are not carried across, and a model placed several times comes back with each copy baked into its own position.

Do I need to install anything to open STL files?

No installation is needed for the conversion itself — it runs in the browser you already have. Opening the STL afterwards needs whatever software normally handles Stereolithography on your device.

PLYtoSTL

Convert PLY to STL

Up to 3 files at once, 100 with Pro. Mixed formats are fine.

You can convert PLY to STL free and without an account: drop the file above and the STL is ready to download in a second or two. The conversion happens inside your own browser, so the file is never uploaded — it works on Windows, Mac, Linux, iPhone and Android, and keeps working with the network switched off.

What PLY and STL are for

The scanner format. Carries per-point colour, which is why 3D scans arrive as PLY.

The 3D printing standard. Triangles only — no colour, no material, no texture.

How to convert PLY to STL

Drop your PLY file onto this page, or click to pick one.
Choose STL as the target. The conversion runs inside your browser — the file is never uploaded.
Download the finished STL file.

PLY vs STL: what changes

PLY compared with STL
	PLY	STL
Full name	Polygon File Format	Stereolithography
File extension	.ply	.stl
Media type	model/ply	model/stl

Quality: The result is a close reconstruction rather than an exact copy. Check it before relying on it.
Where it runs: This conversion runs inside your browser. Your file is never uploaded, and it works with the network disconnected.
What can be lost: Geometry only. Materials, colours, textures and animation are not carried across, and a model placed several times comes back with each copy baked into its own position.

PLY to STL: common questions

Are my PLY files uploaded anywhere?: No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.
Is converting PLY to STL free?: Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.
Does converting PLY to STL lose quality?: PLY and STL describe content in fundamentally different ways, so the conversion is a reconstruction rather than a copy. The result is faithful, but not byte-for-byte equivalent. Geometry only. Materials, colours, textures and animation are not carried across, and a model placed several times comes back with each copy baked into its own position.
Do I need to install anything to open STL files?: No installation is needed for the conversion itself — it runs in the browser you already have. Opening the STL afterwards needs whatever software normally handles Stereolithography on your device.