DXR (.dxr)
.dxr file signature | application/octet-stream
Macromedia Directorfile format[86][84][85]
Magic Bytes
Offset 0
52 49 46 58 4D 56 39 33
Sources: Wikipedia
Extension
.dxr
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .dxr files in Python
def is_dxr(file_path: str) -> bool:
"""Check if file is a valid DXR by magic bytes."""
signature = bytes([0x52, 0x49, 0x46, 0x58, 0x4D, 0x56, 0x39, 0x33])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .dxr files in Node.js
function isDXR(buffer: Buffer): boolean {
const signature = Buffer.from([0x52, 0x49, 0x46, 0x58, 0x4D, 0x56, 0x39, 0x33]);
return buffer.subarray(0, 8).equals(signature);
}How to validate .dxr files in Go
func IsDXR(data []byte) bool {
signature := []byte{0x52, 0x49, 0x46, 0x58, 0x4D, 0x56, 0x39, 0x33}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
/api/v1/dxr
curl https://filesignature.org/api/v1/dxr
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .dxr file?
A .dxr file is a DXR file. Macromedia Directorfile format[86][84][85]
What are the magic bytes for .dxr files?
The magic bytes for DXR files are 52 49 46 58 4D 56 39 33 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .dxr file?
To validate a .dxr file, read the first bytes of the file and compare them against the known magic bytes (52 49 46 58 4D 56 39 33) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .dxr files?
There is no officially registered MIME type for .dxr files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .dxr files?
DXR (.dxr) 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.