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SDD magic bytes (.sdd)

.sdd file signature: D0 CF 11 E0 A1 B1 1A E1 | application/vnd.stardivision.impress

StarOffice Impress Document (SDD) is a presentation file format created by StarDivision and later maintained by Sun Microsystems for the StarOffice suite. It was used for slide-based presentations, including text, charts, graphics, and speaker notes, and opened primarily in StarOffice and early LibreOffice versions. As a legacy format, it is generally safe to inspect, though compatibility is limited and conversion to modern OpenDocument Presentation files is often required.

Safe

Magic Bytes

Offset 0
D0 CF 11 E0 A1 B1 1A E1

Sources: Apache Tika

Extension

.sdd

MIME Type

application/vnd.stardivision.impress

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .sdd files in Python

Python 
def is_sdd(file_path: str) -> bool:
    """Check if file is a valid SDD by magic bytes."""
    signature = bytes([0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1])
    with open(file_path, "rb") as f:
        return f.read(8) == signature

How to validate .sdd files in Node.js

Node.js 
function isSDD(buffer: Buffer): boolean {
  const signature = Buffer.from([0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1]);
  return buffer.subarray(0, 8).equals(signature);
}

How to validate .sdd files in Go

Go 
func IsSDD(data []byte) bool {
    signature := []byte{0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1}
    if len(data) < 8 {
        return false
    }
    return bytes.Equal(data[:8], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .sdd file?

A .sdd file is identified by the magic bytes D0 CF 11 E0 A1 B1 1A E1 at byte offset 0. StarOffice Impress Document (SDD) is a presentation file format created by StarDivision and later maintained by Sun Microsystems for the StarOffice suite. It was used for slide-based presentations, including text, charts, graphics, and speaker notes, and opened primarily in StarOffice and early LibreOffice versions. As a legacy format, it is generally safe to inspect, though compatibility is limited and conversion to modern OpenDocument Presentation files is often required.

What are the magic bytes for .sdd files?

The magic bytes for SDD (.sdd) files are D0 CF 11 E0 A1 B1 1A E1 at byte offset 0. These bytes identify the file format more reliably than the extension alone.

How do I validate a .sdd file?

To validate a .sdd file, read the first bytes of the file and compare them against the known magic bytes (D0 CF 11 E0 A1 B1 1A E1) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .sdd files?

The primary MIME type for .sdd files is application/vnd.stardivision.impress.

Is it safe to open .sdd files?

SDD (.sdd) 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.