MS Publisher border (.bdr)
.bdr file signature | application/octet-stream
MS Publisher border
Magic Bytes
Offset 0
58 54
Sources: Gary Kessler
Extension
.bdr
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .bdr files in Python
def is_bdr(file_path: str) -> bool:
"""Check if file is a valid BDR by magic bytes."""
signature = bytes([0x58, 0x54])
with open(file_path, "rb") as f:
return f.read(2) == signatureHow to validate .bdr files in Node.js
function isBDR(buffer: Buffer): boolean {
const signature = Buffer.from([0x58, 0x54]);
return buffer.subarray(0, 2).equals(signature);
}How to validate .bdr files in Go
func IsBDR(data []byte) bool {
signature := []byte{0x58, 0x54}
if len(data) < 2 {
return false
}
return bytes.Equal(data[:2], signature)
}API Endpoint
/api/v1/bdr
curl https://filesignature.org/api/v1/bdr
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .bdr file?
A .bdr file is a MS Publisher border file. MS Publisher border
What are the magic bytes for .bdr files?
The magic bytes for MS Publisher border files are 58 54 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .bdr file?
To validate a .bdr file, read the first bytes of the file and compare them against the known magic bytes (58 54) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .bdr files?
There is no officially registered MIME type for .bdr files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .bdr files?
MS Publisher border (.bdr) 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.