Adobe InDesign document (.indd)

.indd file signature | application/x-adobe-indesign

Adobe InDesign document

Safe

Magic Bytes

Offset 0


              06 06 ED F5 D8 1D 46 E5 BD 31 EF E7 FE 74 B7 1D

Sources: Apache Tika, Wikipedia, Gary Kessler

All Known Signatures

3 signature variants are documented for .indd files across multiple sources.

Hex Signature	Offset	Sources
06 06 ED F5 D8 1D 46 E5 BD 31 EF E7 FE 74 B7 1D	0	Apache Tika, Wikipedia, Gary Kessler
04 00 00 00 20 03 00 00	0	Gary Kessler
05 00 00 00 20 03 00 00	0	Gary Kessler

Extension

.indd

MIME Type

application/x-adobe-indesign

Byte Offset

Risk Level

Safe

Validation Code

How to validate .indd files in Python

Python

def is_indd(file_path: str) -> bool:
    """Check if file is a valid INDD by magic bytes."""
    signature = bytes([0x06, 0x06, 0xED, 0xF5, 0xD8, 0x1D, 0x46, 0xE5, 0xBD, 0x31, 0xEF, 0xE7, 0xFE, 0x74, 0xB7, 0x1D])
    with open(file_path, "rb") as f:
        return f.read(16) == signature

How to validate .indd files in Node.js

Node.js

function isINDD(buffer: Buffer): boolean {
  const signature = Buffer.from([0x06, 0x06, 0xED, 0xF5, 0xD8, 0x1D, 0x46, 0xE5, 0xBD, 0x31, 0xEF, 0xE7, 0xFE, 0x74, 0xB7, 0x1D]);
  return buffer.subarray(0, 16).equals(signature);
}

How to validate .indd files in Go

func IsINDD(data []byte) bool {
    signature := []byte{0x06, 0x06, 0xED, 0xF5, 0xD8, 0x1D, 0x46, 0xE5, 0xBD, 0x31, 0xEF, 0xE7, 0xFE, 0x74, 0xB7, 0x1D}
    if len(data) < 16 {
        return false
    }
    return bytes.Equal(data[:16], signature)
}

API Endpoint

GET /api/v1/indd


              curl https://filesignature.org/api/v1/indd

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .indd file?

A .indd file is a Adobe InDesign document file. Adobe InDesign document

What are the magic bytes for .indd files?

The magic bytes for Adobe InDesign document files are 06 06 ED F5 D8 1D 46 E5 BD 31 EF E7 FE 74 B7 1D at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .indd file?

To validate a .indd file, read the first bytes of the file and compare them against the known magic bytes (06 06 ED F5 D8 1D 46 E5 BD 31 EF E7 FE 74 B7 1D) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .indd files?

The primary MIME type for .indd files is application/x-adobe-indesign.

Is it safe to open .indd files?

Adobe InDesign document (.indd) 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.