PMT (.pmt)
.pmt file signature | application/octet-stream
PMT is a template file format used by SoftMaker PlanMaker and maintained by SoftMaker Office. It is used to create reusable spreadsheet layouts, worksheets, and formatting presets for business and personal documents. PMT files are generally safe, although, as with other office documents, they should be opened from trusted sources to reduce the risk of malicious embedded content.
Magic Bytes
Offset 0
78 56 34
Sources: Wikipedia
Extension
.pmt
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .pmt files in Python
def is_pmt(file_path: str) -> bool:
"""Check if file is a valid PMT by magic bytes."""
signature = bytes([0x78, 0x56, 0x34])
with open(file_path, "rb") as f:
return f.read(3) == signatureHow to validate .pmt files in Node.js
function isPMT(buffer: Buffer): boolean {
const signature = Buffer.from([0x78, 0x56, 0x34]);
return buffer.subarray(0, 3).equals(signature);
}How to validate .pmt files in Go
func IsPMT(data []byte) bool {
signature := []byte{0x78, 0x56, 0x34}
if len(data) < 3 {
return false
}
return bytes.Equal(data[:3], signature)
}API Endpoint
/api/v1/pmt
curl https://filesignature.org/api/v1/pmt
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .pmt file?
A .pmt file is identified by the magic bytes 78 56 34 at byte offset 0. PMT is a template file format used by SoftMaker PlanMaker and maintained by SoftMaker Office. It is used to create reusable spreadsheet layouts, worksheets, and formatting presets for business and personal documents. PMT files are generally safe, although, as with other office documents, they should be opened from trusted sources to reduce the risk of malicious embedded content.
What are the magic bytes for .pmt files?
The magic bytes for PMT files are 78 56 34 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .pmt file?
To validate a .pmt file, read the first bytes of the file and compare them against the known magic bytes (78 56 34) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .pmt files?
There is no officially registered MIME type for .pmt files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .pmt files?
PMT (.pmt) 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.