SD7
application/x-sas-data
Magic Bytes
Offset: 84
53 41 53 20 46 49 4C 45
The SD7 file format is a proprietary data storage container created and maintained by the SAS Institute for its statistical analysis software suite. These files are primarily used to store large-scale structured datasets for complex data management, business intelligence, and advanced predictive modeling applications. Although this specific extension is associated with legacy Version 7 datasets, the format remains a secure, non-executable binary structure used exclusively within professional data science environments.
Validation Code
How to validate .sd7 files in Python
Python
def is_sd7(file_path: str) -> bool:
"""
Check if file is a valid SD7 by magic bytes.
Signature offset: 84 bytes
"""
signature = bytes([0x53, 0x41, 0x53, 0x20, 0x46, 0x49, 0x4C, 0x45])
with open(file_path, "rb") as f:
f.seek(84)
return f.read(8) == signatureHow to validate .sd7 files in Node.js
Node.js
function isSD7(buffer: Buffer): boolean {
// Signature offset: 84 bytes
const signature = Buffer.from([0x53, 0x41, 0x53, 0x20, 0x46, 0x49, 0x4C, 0x45]);
if (buffer.length < 92) return false;
return buffer.subarray(84, 92).equals(signature);
}
Go
func IsSD7(data []byte) bool {
// Signature offset: 84 bytes
signature := []byte{0x53, 0x41, 0x53, 0x20, 0x46, 0x49, 0x4C, 0x45}
if len(data) < 92 {
return false
}
return bytes.Equal(data[84:92], signature)
}API Endpoint
GET
/api/v1/sd7
curl https://filesignature.org/api/v1/sd7