DesignTools 2D Design file (.dtd)
.dtd file signature | application/octet-stream
The DesignTools 2D Design file is a proprietary file format associated with the DesignTools application suite, originally created and maintained by its vendor for storing 2D design data. It is used for drafting, layout work, and other computer-aided design tasks within compatible DesignTools software and related utilities. The format is generally considered safe, but like other design files it should be opened only with trusted software because malformed files can still cause application errors.
Magic Bytes
Offset 0
07 64 74 32 64 64 74 64
Sources: Wikipedia, Gary Kessler
Extension
.dtd
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .dtd files in Python
def is_dtd(file_path: str) -> bool:
"""Check if file is a valid DTD by magic bytes."""
signature = bytes([0x07, 0x64, 0x74, 0x32, 0x64, 0x64, 0x74, 0x64])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .dtd files in Node.js
function isDTD(buffer: Buffer): boolean {
const signature = Buffer.from([0x07, 0x64, 0x74, 0x32, 0x64, 0x64, 0x74, 0x64]);
return buffer.subarray(0, 8).equals(signature);
}How to validate .dtd files in Go
func IsDTD(data []byte) bool {
signature := []byte{0x07, 0x64, 0x74, 0x32, 0x64, 0x64, 0x74, 0x64}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
/api/v1/dtd
curl https://filesignature.org/api/v1/dtd
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .dtd file?
A .dtd file is a DesignTools 2D Design file file. The DesignTools 2D Design file is a proprietary file format associated with the DesignTools application suite, originally created and maintained by its vendor for storing 2D design data. It is used for drafting, layout work, and other computer-aided design tasks within compatible DesignTools software and related utilities. The format is generally considered safe, but like other design files it should be opened only with trusted software because malformed files can still cause application errors.
What are the magic bytes for .dtd files?
The magic bytes for DesignTools 2D Design file files are 07 64 74 32 64 64 74 64 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .dtd file?
To validate a .dtd file, read the first bytes of the file and compare them against the known magic bytes (07 64 74 32 64 64 74 64) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .dtd files?
There is no officially registered MIME type for .dtd files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .dtd files?
DesignTools 2D Design file (.dtd) 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.