Visio file (.vsd)
.vsd file signature | application/octet-stream
Magic Bytes
Offset: 0
CF FA ED FE
Visio file
Sources: Gary Kessler
All Known Signatures
2 signature variants are documented for .vsd files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| CF FA ED FE | 0 | Gary Kessler |
| D0 CF 11 E0 A1 B1 1A E1 | 0 | Gary Kessler |
Validation Code
How to validate .vsd files in Python
def is_vsd(file_path: str) -> bool:
"""Check if file is a valid VSD by magic bytes."""
signature = bytes([0xCF, 0xFA, 0xED, 0xFE])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .vsd files in Node.js
function isVSD(buffer: Buffer): boolean {
const signature = Buffer.from([0xCF, 0xFA, 0xED, 0xFE]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .vsd files in Go
func IsVSD(data []byte) bool {
signature := []byte{0xCF, 0xFA, 0xED, 0xFE}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/vsd
curl https://filesignature.org/api/v1/vsd
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .vsd file?
A .vsd file is a Visio file file. Visio file
What are the magic bytes for .vsd files?
The magic bytes for Visio file files are CF FA ED FE at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .vsd file?
To validate a .vsd file, read the first bytes of the file and compare them against the known magic bytes (CF FA ED FE) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .vsd files?
There is no officially registered MIME type for .vsd files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .vsd files?
Visio file (.vsd) 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.