To convert STL to PLY, choose your STL 3D models above, adjust the options if needed and press "Convert to PLY". The PLY downloads instantly: free, with no sign-up, and the file never leaves your device.
About the STL to PLY Converter
Convert STL to PLY online for free, with no account and no watermark. STL has no colours or materials and is heavy to show on the web, so switching to PLY is the quickest way to get a PLY mesh with vertex colours for 3D scanning, photogrammetry, point clouds and research datasets.
Models are loaded and exported with three.js, the most widely used open-source 3D library for the web. Because everything happens on your own device, your 3D models are never uploaded, stored or seen by anyone else, which makes it safe for client prototypes and unreleased product designs.
What to expect: geometry, normals and UV coordinates are converted, and the model is not rescaled.
How to use the STL to PLY Converter
- Click "Choose files" or drag your STL 3D models onto the box. You can add several at once.
- No settings are needed.
- Press "Convert to PLY". The conversion runs on your device and shows its progress.
- Download each PLY file, or use "Download all (ZIP)" when you converted several.
- Open the result in MeshLab or CloudCompare to check it; your original STL is never changed.
Tips & benchmarks
- Vertex colours and normals are kept in the binary PLY when the source has them.
- STL and OBJ files have no units; most slicers assume millimetres, so check the size after importing.
- Keep the file name simple (letters, numbers and hyphens) if you plan to upload the PLY to a website or government portal.
Frequently asked questions
How do I convert STL to PLY?
Click "Choose files", select your STL 3D models, adjust the options if you want, and press "Convert to PLY". The PLY downloads immediately; with several files you can download everything as one ZIP.
Is this STL to PLY converter free and safe?
Yes. It is completely free, with no sign-up, no daily limit and no watermark. The conversion runs inside your browser, so your 3D models never leave your phone or computer and nothing is stored on News Appite's servers.
Are textures and materials kept?
Basic materials and vertex colours are carried over where both formats support them. External texture image files referenced by OBJ or glTF are not bundled unless they are embedded in the source.
Can I convert several STL files at once?
Yes. Add as many STL files as you like; they are converted one after another and you can download them individually or together as a ZIP.
Does it work on iPhone, Android and Mac?
Yes. The converter works in any modern browser, including Chrome, Safari, Edge and Firefox, on Android, iPhone, iPad, Windows, macOS and Linux. No app is needed.
What is the difference between STL and PLY?
STL (Stereolithography) is a 3D printing mesh best suited to 3D printing, slicers such as Cura and PrusaSlicer, and CNC. PLY (Polygon File Format (Stanford)) is a 3D scan and point-cloud format best suited to 3D scanning, photogrammetry, point clouds and research datasets.
Is there a file size limit?
There is no upload limit, because nothing is uploaded. The practical limit is your device's memory: files of a few hundred megabytes work on most computers, and phones handle smaller files comfortably.
How do I convert STL to PLY in Python?
Use trimesh: trimesh.load('input.stl').export('output.ply'). If you just need the file, this converter does it in the browser without writing any code.
STL ko PLY kaise kare?
Is page par "Choose files" dabaiye, apni STL file chuniye aur "Convert to PLY" par click kijiye. PLY file turant download ho jaati hai. Ye bilkul free hai, sign-up nahi chahiye, aur aapki file kisi server par upload nahi hoti.
STL vs PLY: format comparison
| STL | PLY | |
|---|---|---|
| Full name | Stereolithography | Polygon File Format (Stanford) |
| Type | 3D printing mesh | 3D scan and point-cloud format |
| Created by | 3D Systems, 1987 | Stanford University, 1994 |
| Compression | Binary or ASCII triangles | Binary or ASCII |
| File extension | .stl | .ply |
| MIME type | model/stl | model/ply |
| Best for | 3D printing, slicers such as Cura and PrusaSlicer, and CNC | 3D scanning, photogrammetry, point clouds and research datasets |
| Opens in | Cura, PrusaSlicer, Bambu Studio, Fusion 360, Tinkercad and Blender | MeshLab, CloudCompare, Blender, Open3D and scanning apps |
What is a STL file?
STL was created by 3D Systems in 1987 for the first stereolithography printers. It describes a surface as raw triangles with no colour or units, and it is still the default file for 3D printing.
What is a PLY file?
PLY was developed at Stanford in the 1990s to store data from 3D scanners. It supports vertex colours and point clouds, which is why photogrammetry apps and LiDAR scanners often export PLY.
Need it the other way round? Use the PLY to STL Converter.
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All tools on News Appite are free to use for personal and commercial work. Calculations and file conversions are performed in your browser; the redirect and cache checkers make a single request to the URL you enter and store nothing. Found a bug or want a new tool? Tell us.