Microsoft Document Imaging file (.mdi)
.mdi file signature | image/vnd.ms-modi
Microsoft Document Imaging file
Magic Bytes
Offset 0
45 50 2A 00
Sources: Apache Tika
All Known Signatures
2 signature variants are documented for .mdi files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| 45 50 2A 00 | 0 | Apache Tika |
| 45 50 | 0 | Gary Kessler |
Extension
.mdi
MIME Type
image/vnd.ms-modi
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .mdi files in Python
def is_mdi(file_path: str) -> bool:
"""Check if file is a valid MDI by magic bytes."""
signature = bytes([0x45, 0x50, 0x2A, 0x00])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .mdi files in Node.js
function isMDI(buffer: Buffer): boolean {
const signature = Buffer.from([0x45, 0x50, 0x2A, 0x00]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .mdi files in Go
func IsMDI(data []byte) bool {
signature := []byte{0x45, 0x50, 0x2A, 0x00}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/mdi
curl https://filesignature.org/api/v1/mdi
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .mdi file?
A .mdi file is a Microsoft Document Imaging file file. Microsoft Document Imaging file
What are the magic bytes for .mdi files?
The magic bytes for Microsoft Document Imaging file files are 45 50 2A 00 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .mdi file?
To validate a .mdi file, read the first bytes of the file and compare them against the known magic bytes (45 50 2A 00) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .mdi files?
The primary MIME type for .mdi files is image/vnd.ms-modi.
Is it safe to open .mdi files?
Microsoft Document Imaging file (.mdi) 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.