PUFF (.puff)
.puff file signature | application/octet-stream
PUFF is a file format associated with the Executable and Linkable Format (ELF), originally developed for Unix systems and now maintained through the broader Unix and Linux software ecosystem. It is used for executable programs, shared libraries, object files, and core dumps on many Unix-like operating systems. Because it can contain executable code, files should be obtained from trusted sources; the format itself is long established and still widely used.
Magic Bytes
Offset 0
7F 45 4C 46
Sources: Wikipedia
Extension
.puff
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .puff files in Python
def is_puff(file_path: str) -> bool:
"""Check if file is a valid PUFF by magic bytes."""
signature = bytes([0x7F, 0x45, 0x4C, 0x46])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .puff files in Node.js
function isPUFF(buffer: Buffer): boolean {
const signature = Buffer.from([0x7F, 0x45, 0x4C, 0x46]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .puff files in Go
func IsPUFF(data []byte) bool {
signature := []byte{0x7F, 0x45, 0x4C, 0x46}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/puff
curl https://filesignature.org/api/v1/puff
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .puff file?
A .puff file is identified by the magic bytes 7F 45 4C 46 at byte offset 0. PUFF is a file format associated with the Executable and Linkable Format (ELF), originally developed for Unix systems and now maintained through the broader Unix and Linux software ecosystem. It is used for executable programs, shared libraries, object files, and core dumps on many Unix-like operating systems. Because it can contain executable code, files should be obtained from trusted sources; the format itself is long established and still widely used.
What are the magic bytes for .puff files?
The magic bytes for PUFF files are 7F 45 4C 46 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .puff file?
To validate a .puff file, read the first bytes of the file and compare them against the known magic bytes (7F 45 4C 46) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .puff files?
There is no officially registered MIME type for .puff files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .puff files?
PUFF (.puff) 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.