OpenOffice spreadsheet (.sxw)
.sxw file signature | application/vnd.sun.xml.writer
OpenOffice spreadsheet (Calc), drawing (Draw), presentation (Impress),and word processing (Writer) files, respectively.
Magic Bytes
Offset 0
50 4B
Sources: Apache Tika
All Known Signatures
2 signature variants are documented for .sxw files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| 50 4B | 0 | Apache Tika |
| 50 4B 03 04 | 0 | Gary Kessler |
Extension
.sxw
MIME Type
application/vnd.sun.xml.writer
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .sxw files in Python
def is_sxw(file_path: str) -> bool:
"""Check if file is a valid SXW by magic bytes."""
signature = bytes([0x50, 0x4B])
with open(file_path, "rb") as f:
return f.read(2) == signatureHow to validate .sxw files in Node.js
function isSXW(buffer: Buffer): boolean {
const signature = Buffer.from([0x50, 0x4B]);
return buffer.subarray(0, 2).equals(signature);
}How to validate .sxw files in Go
func IsSXW(data []byte) bool {
signature := []byte{0x50, 0x4B}
if len(data) < 2 {
return false
}
return bytes.Equal(data[:2], signature)
}API Endpoint
/api/v1/sxw
curl https://filesignature.org/api/v1/sxw
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .sxw file?
A .sxw file is a OpenOffice spreadsheet file. OpenOffice spreadsheet (Calc), drawing (Draw), presentation (Impress),and word processing (Writer) files, respectively.
What are the magic bytes for .sxw files?
The magic bytes for OpenOffice spreadsheet files are 50 4B at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .sxw file?
To validate a .sxw file, read the first bytes of the file and compare them against the known magic bytes (50 4B) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .sxw files?
The primary MIME type for .sxw files is application/vnd.sun.xml.writer.
Is it safe to open .sxw files?
OpenOffice spreadsheet (.sxw) 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.