KWord document magic bytes (.kwd)
.kwd file signature: 50 4B 03 04 | application/vnd.kde.kword
KWord document (KWD) is a word-processing file format created for the KWord application in the KOffice suite and maintained within the KDE project. It was used for editable text documents such as letters, reports, manuals, and other formatted office content in Linux desktop environments. The format is now largely legacy, and although it is generally safe, support may be limited in modern software, so older files may require conversion.
Magic Bytes
Offset 0
50 4B 03 04
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. KWord document (KWD) is a word-processing file format created for the KWord application in the KOffice suite and maintained within the KDE project. It was used for editable text documents such as letters, reports, manuals, and other formatted office content in Linux desktop environments. The format is now largely legacy, and although it is generally safe, support may be limited in modern software, so older files may require conversion.
What are the magic bytes for .kwd files?
The magic bytes for KWord document (.kwd) files are 50 4B 03 04 at byte offset 0. These bytes identify the file format more reliably than the extension alone.
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?
The primary MIME type for .kwd files is application/vnd.kde.kword.
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.