NB
application/mathematica
Magic Bytes
Offset: 0
28 2A 2A
The Wolfram Notebook (NB) is a proprietary file format developed and maintained by Wolfram Research for use within the Mathematica ecosystem. This format serves as an interactive document for mathematical computation, data visualization, and literate programming, containing both executable code and formatted results. While inherently safe as a text-based storage format, notebooks can include dynamic content that may pose risks if executed from untrusted or unverified sources.
Validation Code
How to validate .nb files in Python
Python
def is_nb(file_path: str) -> bool:
"""Check if file is a valid NB by magic bytes."""
signature = bytes([0x28, 0x2A, 0x2A])
with open(file_path, "rb") as f:
return f.read(3) == signatureHow to validate .nb files in Node.js
Node.js
function isNB(buffer: Buffer): boolean {
const signature = Buffer.from([0x28, 0x2A, 0x2A]);
return buffer.subarray(0, 3).equals(signature);
}
Go
func IsNB(data []byte) bool {
signature := []byte{0x28, 0x2A, 0x2A}
if len(data) < 3 {
return false
}
return bytes.Equal(data[:3], signature)
}API Endpoint
GET
/api/v1/nb
curl https://filesignature.org/api/v1/nb