KWord document (.kwd)
.kwd file signature | application/octet-stream
Magic Bytes
Offset: 0
50 4B 03 04
KWord document
Sources: Gary Kessler
Validation Code
How to validate .kwd files in Python
def is_kwd(file_path: str) -> bool:
"""Check if file is a valid KWD by magic bytes."""
signature = bytes([0x50, 0x4B, 0x03, 0x04])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .kwd files in Node.js
function isKWD(buffer: Buffer): boolean {
const signature = Buffer.from([0x50, 0x4B, 0x03, 0x04]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .kwd files in Go
func IsKWD(data []byte) bool {
signature := []byte{0x50, 0x4B, 0x03, 0x04}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/kwd
curl https://filesignature.org/api/v1/kwd
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .kwd file?
A .kwd file is a KWord document file. KWord document
What are the magic bytes for .kwd files?
The magic bytes for KWord document files are 50 4B 03 04 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .kwd file?
To validate a .kwd file, read the first bytes of the file and compare them against the known magic bytes (50 4B 03 04) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .kwd files?
There is no officially registered MIME type for .kwd files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .kwd files?
KWord document (.kwd) 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.