CDI (.cdi)
.cdi file signature | application/octet-stream
CD-i CD image file
Magic Bytes
Offset 0
43 44 30 30 31
Sources: Wikipedia
Extension
.cdi
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .cdi files in Python
def is_cdi(file_path: str) -> bool:
"""Check if file is a valid CDI by magic bytes."""
signature = bytes([0x43, 0x44, 0x30, 0x30, 0x31])
with open(file_path, "rb") as f:
return f.read(5) == signatureHow to validate .cdi files in Node.js
function isCDI(buffer: Buffer): boolean {
const signature = Buffer.from([0x43, 0x44, 0x30, 0x30, 0x31]);
return buffer.subarray(0, 5).equals(signature);
}How to validate .cdi files in Go
func IsCDI(data []byte) bool {
signature := []byte{0x43, 0x44, 0x30, 0x30, 0x31}
if len(data) < 5 {
return false
}
return bytes.Equal(data[:5], signature)
}API Endpoint
/api/v1/cdi
curl https://filesignature.org/api/v1/cdi
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .cdi file?
A .cdi file is a CDI file. CD-i CD image file
What are the magic bytes for .cdi files?
The magic bytes for CDI files are 43 44 30 30 31 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .cdi file?
To validate a .cdi file, read the first bytes of the file and compare them against the known magic bytes (43 44 30 30 31) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .cdi files?
There is no officially registered MIME type for .cdi files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .cdi files?
CDI (.cdi) 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.