Never leaves your machine
The parse, merge, and encode steps all run in this tab. Client models under NDA are safe to convert.
FORMAT CONVERSION
PLY to STL converter
Convert PLY files to STL in your browser. Nothing uploads, there is no file-size queue, and the result downloads immediately.
- 100% in-browser
- Free, unlimited STL
- Scale-accurate output
Source file
Drop a PLY file hereAccepts .ply · processed locally
Result
STLAccepts .stl · processed locally
About this converter
This converter parses your PLY file with the same three.js pipeline used by our viewer, merges every mesh into a single indexed geometry in world space, and re-encodes it as STL. Because it runs on your own machine, large assemblies convert as fast as your CPU allows and no copy of your model is ever stored on a server.
Scale-accurate output
World transforms are baked into vertex positions, so a 42mm part stays 42mm after conversion.
No cap, no watermark
Convert as many files as you like without an account, a queue, or a paid tier.
Frequently asked questions
Is there a file size limit?
There is no server limit because there is no server. The practical ceiling is your available browser memory; meshes up to a few hundred megabytes convert fine on a typical laptop.
Will the model keep its scale?
Yes. Node transforms are applied to the vertices before export, so dimensions and orientation match the source file.
Do you store my file?
No. The file is read directly from your disk into browser memory and discarded when you close the tab.
Can I convert several files at once?
Convert them one after another. Each conversion is independent and takes only a few seconds, and the previous result stays downloadable until you load a new file.