OTP magic bytes (.otp)
.otp file signature: 50 4B | application/vnd.oasis.opendocument.presentation-template
Category: Office
OpenDocument Presentation Template (OTP) is a template file format defined and maintained by OASIS as part of the OpenDocument family. It is used by applications such as LibreOffice, Apache OpenOffice, and related office suites to create reusable presentation layouts, styles, and default content. The format is generally safe to open, though like other office templates it may contain embedded objects or macros in some implementations.
Magic Bytes
Offset 0
50 4B
Sources: Apache Tika
Validation Code
How to validate .otp files in Python
def is_otp(file_path: str) -> bool:
"""Check if file is a valid OTP by magic bytes."""
signature = bytes([0x50, 0x4B])
with open(file_path, "rb") as f:
return f.read(2) == signatureHow to validate .otp files in Node.js
function isOTP(buffer: Buffer): boolean {
const signature = Buffer.from([0x50, 0x4B]);
return buffer.subarray(0, 2).equals(signature);
}How to validate .otp files in Go
func IsOTP(data []byte) bool {
signature := []byte{0x50, 0x4B}
if len(data) < 2 {
return false
}
return bytes.Equal(data[:2], signature)
}API Endpoint
/api/v1/otp
curl https://filesignature.org/api/v1/otp
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .otp file?
A .otp file is identified by the magic bytes 50 4B at byte offset 0. OpenDocument Presentation Template (OTP) is a template file format defined and maintained by OASIS as part of the OpenDocument family. It is used by applications such as LibreOffice, Apache OpenOffice, and related office suites to create reusable presentation layouts, styles, and default content. The format is generally safe to open, though like other office templates it may contain embedded objects or macros in some implementations.
What are the magic bytes for .otp files?
The magic bytes for OTP (.otp) files are 50 4B at byte offset 0. These bytes identify the file format more reliably than the extension alone.
How do I validate a .otp file?
To validate a .otp 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 .otp files?
The primary MIME type for .otp files is application/vnd.oasis.opendocument.presentation-template.
Is it safe to open .otp files?
OTP (.otp) 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.