OUT magic bytes (.out)
.out file signature: 7F 45 4C 46 | application/octet-stream
Category: Executables
OUT is a Unix executable file format based on the Executable and Linkable Format (ELF), originally defined by Unix System Laboratories and maintained as an open standard in Unix-like systems. It is used for compiled programs, shared libraries, and object files on systems such as Linux and BSD, where it supports loading and linking. Because it contains executable code, files should be obtained from trusted sources, and the format is primarily of historical interest today.
Magic Bytes
Offset 0
7F 45 4C 46
Sources: Wikipedia
Validation Code
How to validate .out files in Python
def is_out(file_path: str) -> bool:
"""Check if file is a valid OUT by magic bytes."""
signature = bytes([0x7F, 0x45, 0x4C, 0x46])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .out files in Node.js
function isOUT(buffer: Buffer): boolean {
const signature = Buffer.from([0x7F, 0x45, 0x4C, 0x46]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .out files in Go
func IsOUT(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/out
curl https://filesignature.org/api/v1/out
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .out file?
A .out file is identified by the magic bytes 7F 45 4C 46 at byte offset 0. OUT is a Unix executable file format based on the Executable and Linkable Format (ELF), originally defined by Unix System Laboratories and maintained as an open standard in Unix-like systems. It is used for compiled programs, shared libraries, and object files on systems such as Linux and BSD, where it supports loading and linking. Because it contains executable code, files should be obtained from trusted sources, and the format is primarily of historical interest today.
What are the magic bytes for .out files?
The magic bytes for OUT (.out) files are 7F 45 4C 46 at byte offset 0. These bytes identify the file format more reliably than the extension alone.
How do I validate a .out file?
To validate a .out 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 .out files?
There is no officially registered MIME type for .out files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .out files?
OUT (.out) 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.