Visio file magic bytes (.vsd)
.vsd file signature: D0 CF 11 E0 A1 B1 1A E1 | application/vnd.visio
Category: Images
Visio file (VSD) is a legacy diagram file format created and maintained by Microsoft for use in Visio. It is used for flowcharts, organizational charts, network diagrams, floor plans, and other technical drawings, and is commonly opened in Microsoft Visio and compatible diagramming tools. As an older binary format, it is generally safe to view, though files from untrusted sources should still be handled with standard caution.
Magic Bytes
Offset 0
D0 CF 11 E0 A1 B1 1A E1
Sources: 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([0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .vsd files in Node.js
function isVSD(buffer: Buffer): boolean {
const signature = Buffer.from([0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1]);
return buffer.subarray(0, 8).equals(signature);
}How to validate .vsd files in Go
func IsVSD(data []byte) bool {
signature := []byte{0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
/api/v1/vsd
curl https://filesignature.org/api/v1/vsd
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .vsd file?
A .vsd file is a Visio file. Visio file (VSD) is a legacy diagram file format created and maintained by Microsoft for use in Visio. It is used for flowcharts, organizational charts, network diagrams, floor plans, and other technical drawings, and is commonly opened in Microsoft Visio and compatible diagramming tools. As an older binary format, it is generally safe to view, though files from untrusted sources should still be handled with standard caution.
What are the magic bytes for .vsd files?
The magic bytes for Visio file (.vsd) files are D0 CF 11 E0 A1 B1 1A E1 at byte offset 0. These bytes identify the file format more reliably than the extension alone.
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 (D0 CF 11 E0 A1 B1 1A E1) 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?
The primary MIME type for .vsd files is application/vnd.visio.
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.