Skip to content

OpenOffice spreadsheet magic bytes (.sxd)

.sxd file signature: 50 4B 03 04 | application/vnd.sun.xml.draw

OpenOffice.org Draw document format (SXD) is an XML-based office file format originally created by Sun Microsystems and later maintained by the Apache OpenOffice and LibreOffice communities. It is used for vector drawings, diagrams, and page-layout content within office suites such as OpenOffice Draw and LibreOffice Draw. The format is largely legacy, but it may still be encountered in archived documents; files from untrusted sources should be opened with standard office-suite precautions.

Safe

Magic Bytes

Offset 0
50 4B 03 04

Sources: Gary Kessler

Extension

.sxd

MIME Type

application/vnd.sun.xml.draw

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .sxd files in Python

Python 
def is_sxd(file_path: str) -> bool:
    """Check if file is a valid SXD by magic bytes."""
    signature = bytes([0x50, 0x4B, 0x03, 0x04])
    with open(file_path, "rb") as f:
        return f.read(4) == signature

How to validate .sxd files in Node.js

Node.js 
function isSXD(buffer: Buffer): boolean {
  const signature = Buffer.from([0x50, 0x4B, 0x03, 0x04]);
  return buffer.subarray(0, 4).equals(signature);
}

How to validate .sxd files in Go

Go 
func IsSXD(data []byte) bool {
    signature := []byte{0x50, 0x4B, 0x03, 0x04}
    if len(data) < 4 {
        return false
    }
    return bytes.Equal(data[:4], signature)
}

API Endpoint

GET /api/v1/sxd
curl https://filesignature.org/api/v1/sxd

See the full API documentation for all endpoints and parameters.

Related Formats

.sxc .sxi .sxw

Frequently Asked Questions

What is a .sxd file?

A .sxd file is an OpenOffice spreadsheet. OpenOffice.org Draw document format (SXD) is an XML-based office file format originally created by Sun Microsystems and later maintained by the Apache OpenOffice and LibreOffice communities. It is used for vector drawings, diagrams, and page-layout content within office suites such as OpenOffice Draw and LibreOffice Draw. The format is largely legacy, but it may still be encountered in archived documents; files from untrusted sources should be opened with standard office-suite precautions.

What are the magic bytes for .sxd files?

The magic bytes for OpenOffice spreadsheet (.sxd) 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 .sxd file?

To validate a .sxd 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 .sxd files?

The primary MIME type for .sxd files is application/vnd.sun.xml.draw.

Is it safe to open .sxd files?

OpenOffice spreadsheet (.sxd) 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.