USDZ (.usdz)
.usdz file signature | model/vnd.usdz+zip
USDZ is an uncompressed package format for Universal Scene Description (USD) content, created by Pixar and Apple and maintained within the USD ecosystem. It is used to bundle 3D models, textures, animations, and related assets for augmented reality, product visualization, and interchange between digital content tools. Because it is based on a ZIP container, files may be inspected and extracted with common archive software, and untrusted packages should still be handled with normal caution.
Magic Bytes
Offset 0
50 4B 03 04
Sources: Wikipedia
All Known Signatures
3 signature variants are documented for .usdz files across multiple sources.
Extension
.usdz
MIME Type
model/vnd.usdz+zip
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .usdz files in Python
def is_usdz(file_path: str) -> bool:
"""Check if file is a valid USDZ by magic bytes."""
signature = bytes([0x50, 0x4B, 0x03, 0x04])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .usdz files in Node.js
function isUSDZ(buffer: Buffer): boolean {
const signature = Buffer.from([0x50, 0x4B, 0x03, 0x04]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .usdz files in Go
func IsUSDZ(data []byte) bool {
signature := []byte{0x50, 0x4B, 0x03, 0x04}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/usdz
curl https://filesignature.org/api/v1/usdz
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .usdz file?
A .usdz file is identified by the magic bytes 50 4B 03 04 at byte offset 0. USDZ is an uncompressed package format for Universal Scene Description (USD) content, created by Pixar and Apple and maintained within the USD ecosystem. It is used to bundle 3D models, textures, animations, and related assets for augmented reality, product visualization, and interchange between digital content tools. Because it is based on a ZIP container, files may be inspected and extracted with common archive software, and untrusted packages should still be handled with normal caution.
What are the magic bytes for .usdz files?
The magic bytes for USDZ files are 50 4B 03 04 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .usdz file?
To validate a .usdz file, read the first bytes of the file and compare them against the known magic bytes (50 4B 03 04) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .usdz files?
The primary MIME type for .usdz files is model/vnd.usdz+zip.
Is it safe to open .usdz files?
USDZ (.usdz) files are generally safe to open. They are classified as low risk because they primarily contain data rather than executable code. However, always ensure files come from a trusted source.