Polygon File Format is a 3D asset format identified by a text header that starts with ply. Gaussian Splatting PLY files use the PLY container with extended vertex properties for opacity, scale, rotation, and spherical harmonics data.
PLY can be ASCII, binary little-endian, or binary big-endian. Read the format line before parsing the element data.
A generic mesh PLY and a Gaussian Splatting PLY share the same leading header. For Gaussian Splatting, validate properties such as opacity, scale_0, rot_0, and SH coefficient fields instead of trusting the extension alone.
Detection example
SIGNATURE = bytes.fromhex("706c790a")
OFFSET = 0
def is_ply(path: str) -> bool:
with open(path, "rb") as f:
f.seek(OFFSET)
head = f.read(len(SIGNATURE))
return head == SIGNATURE
const SIGNATURE = [0x70, 0x6c, 0x79, 0x0a];
const OFFSET = 0;
// bytes: a Uint8Array / Buffer holding the start of the file
export function isPly(bytes) {
return SIGNATURE.every((byte, i) => bytes[OFFSET + i] === byte);
}
package fileid
import "bytes"
var isplySignature = []byte{0x70, 0x6c, 0x79, 0x0a}
const isplyOffset = 0
func IsPly(b []byte) bool {
end := isplyOffset + len(isplySignature)
if len(b) < end {
return false
}
return bytes.Equal(b[isplyOffset:end], isplySignature)
}
Polygon File Format is used in 3D viewers, asset pipelines, model conversion, avatar loading, and scene validation. Containers, extensions, binary chunks, and texture references all affect implementation behavior.
Common detection mistakes
The .ply extension alone does not prove the file contents. Upload and conversion flows should combine extension, MIME type, leading bytes, and format-specific structure checks.
Polygon File Format can start with signatures such as 70 6C 79 0A or 70 6C 79 0D 0A, but related containers and damaged files may require additional validation.
Security notes
Untrusted input is not safe just because the format was detected. Account for parser exceptions, large files, unexpected encodings, and external references.
Using samples
8 samples help test viewer loading, extension detection, and load time across file sizes.
Voxel51 Train 7k Gaussian Splat PLY is a Polygon File Format sample based on Hugging Face: Voxel51/gaussian_splatting. It can be used to test downloads, parsers, previews, and file type detection.
Voxel51 Train 30k Gaussian Splat PLY is a Polygon File Format sample based on Hugging Face: Voxel51/gaussian_splatting. It can be used to test downloads, parsers, previews, and file type detection.
Voxel51 Playroom 7k Gaussian Splat PLY is a Polygon File Format sample based on Hugging Face: Voxel51/gaussian_splatting. It can be used to test downloads, parsers, previews, and file type detection.
Voxel51 Playroom 30k Gaussian Splat PLY is a Polygon File Format sample based on Hugging Face: Voxel51/gaussian_splatting. It can be used to test downloads, parsers, previews, and file type detection.
Voxel51 Truck 7k Gaussian Splat PLY is a Polygon File Format sample based on Hugging Face: Voxel51/gaussian_splatting. It can be used to test downloads, parsers, previews, and file type detection.
Voxel51 Truck 30k Gaussian Splat PLY is a Polygon File Format sample based on Hugging Face: Voxel51/gaussian_splatting. It can be used to test downloads, parsers, previews, and file type detection.
Voxel51 Dr Johnson 7k Gaussian Splat PLY is a Polygon File Format sample based on Hugging Face: Voxel51/gaussian_splatting. It can be used to test downloads, parsers, previews, and file type detection.
Voxel51 Dr Johnson 30k Gaussian Splat PLY is a Polygon File Format sample based on Hugging Face: Voxel51/gaussian_splatting. It can be used to test downloads, parsers, previews, and file type detection.
What is the magic number (file signature) of Polygon File Format?
Polygon File Format files begin with the byte signature 70 6C 79 0A ("ply.") or 70 6C 79 0D 0A ("ply.."). Detect the format by reading these leading bytes rather than trusting the file extension alone.
What is the MIME type of Polygon File Format?
The MIME type for Polygon File Format is model/ply, application/octet-stream.
What file extension does Polygon File Format use?
Polygon File Format files use the .ply extension. The extension is a convention only and does not guarantee the file contents, so combine it with signature and structure checks.