OBJ to PLY Converter
Convert a Wavefront OBJ model to PLY for 3D-scanning, photogrammetry and research tools.
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About Converting OBJ to PLY
OBJ is a widely supported 3D geometry format that stores vertices, faces, texture coordinates and normals as plain text. It is a common interchange format between modelling, rendering and CAD applications, optionally pairing with an .mtl file for materials. When you need to move away from OBJ, the usual reason is simple: materials live in a separate .mtl file.
Converting your OBJ 3D model to PLY solves that. PLY (the Stanford Triangle Format) stores a polygon mesh and can carry per-vertex colour, normals and custom properties. It is the standard output of 3D scanners and photogrammetry pipelines, available in both ASCII and binary variants. In practice you gain per-vertex colour and custom attributes and standard for 3d scans and photogrammetry. PrivConvert runs the whole OBJ-to-PLY conversion in server memory and deletes your file the instant the PLY is ready — nothing is stored, logged or reused.
When this conversion helps
- You need per-vertex colour and custom attributes
- You need standard for 3D scans and photogrammetry
- You need aSCII and compact binary variants
- Sharing a OBJ 3D model with someone whose software expects PLY
Tips for best results
- Files up to 250 MB are supported, and you can batch-convert several OBJ files at once; each is processed privately and deleted immediately.
How to Convert OBJ to PLY Online
Turning a OBJ file into PLY is straightforward here — upload, convert, download. What you gain with PLY: per-vertex colour and custom attributes.
Drag and drop your file into the upload area, click to browse your device, or paste a URL to a file hosted online. You can upload files up to 250 MB and batch convert up to 20 files at once.
Once uploaded, the conversion from OBJ to PLY starts automatically. The process runs entirely in an isolated environment - your data never leaves the secure pipeline.
Your converted file is ready instantly. Click the download button to save it to your device. The file is deleted from memory immediately after download.
A more private way to convert OBJ files
Plenty of sites convert OBJ files. Very few promise never to keep them — PrivConvert does, and backs it up with how the service is built.
Every conversion runs in its own locked-down process with no network access, so files can never leak or interfere with one another.
Your files are handled entirely by automated code. No staff, partner or AI model ever reads, stores or trains on your data.
Files are processed in volatile memory (RAM) and purged the instant your download is ready — nothing is ever written to disk, cached or backed up.
Every upload and download is protected with TLS 1.3, so your 3D model cannot be intercepted on the way to the server or back to you.
OBJ vs PLY - Format Comparison
| Feature | OBJ | PLY |
|---|---|---|
| File extension | .obj | .ply |
| Full name | Wavefront OBJ | Polygon File Format |
| Introduced | 1990 | 1994 |
| Encoding | Text | Binary |
| Editable | No | No |
| Open standard | Yes | Yes |
| Supported by PrivConvert | Yes (as input) | Yes (as output) |
| Privacy-safe conversion | In-memory, zero storage | |
| Max file size | 250 MB per file | |
| Batch support | Up to 20 files simultaneously | |
Trusted by thousands of users
Professionals reach for PrivConvert when the 3D model they are converting is sensitive and cannot be left sitting on someone else’s server.