DWF
model/vnd.dwf
Magic Bytes
Offset: 0
28 44 57 46 20 56
Design Web Format (DWF) is a compressed vector and raster file format developed and maintained by Autodesk for distributing technical design data. It is primarily utilized to publish, view, and print complex 2D and 3D CAD information, such as architectural drawings and engineering specifications, without requiring the original design software. Although largely superseded by the XML-based DWFx standard, this legacy format remains compatible with viewers like Autodesk Design Review for sharing non-editable documentation securely.
Validation Code
How to validate .dwf files in Python
Python
def is_dwf(file_path: str) -> bool:
"""Check if file is a valid DWF by magic bytes."""
signature = bytes([0x28, 0x44, 0x57, 0x46, 0x20, 0x56])
with open(file_path, "rb") as f:
return f.read(6) == signatureHow to validate .dwf files in Node.js
Node.js
function isDWF(buffer: Buffer): boolean {
const signature = Buffer.from([0x28, 0x44, 0x57, 0x46, 0x20, 0x56]);
return buffer.subarray(0, 6).equals(signature);
}
Go
func IsDWF(data []byte) bool {
signature := []byte{0x28, 0x44, 0x57, 0x46, 0x20, 0x56}
if len(data) < 6 {
return false
}
return bytes.Equal(data[:6], signature)
}API Endpoint
GET
/api/v1/dwf
curl https://filesignature.org/api/v1/dwf