NUP
application/octet-stream
Magic Bytes
Offset: 0
4E 55 52 55 49 4D 47 4E 55 52 55 50 41 4C
The NUP file format is a specialized image and palette container developed for the Nuru terminal graphics specification. It is primarily utilized by digital artists to store character-based ANSI artwork and associated color palettes for display within terminal environments or retro-style applications. As a static binary format, it is considered safe from script-based vulnerabilities, although users should exercise standard precautions when opening files from unknown sources to avoid potential buffer overflow exploits in legacy software.
Validation Code
How to validate .nup files in Python
def is_nup(file_path: str) -> bool:
"""Check if file is a valid NUP by magic bytes."""
signature = bytes([0x4E, 0x55, 0x52, 0x55, 0x49, 0x4D, 0x47, 0x4E, 0x55, 0x52, 0x55, 0x50, 0x41, 0x4C])
with open(file_path, "rb") as f:
return f.read(14) == signatureHow to validate .nup files in Node.js
function isNUP(buffer: Buffer): boolean {
const signature = Buffer.from([0x4E, 0x55, 0x52, 0x55, 0x49, 0x4D, 0x47, 0x4E, 0x55, 0x52, 0x55, 0x50, 0x41, 0x4C]);
return buffer.subarray(0, 14).equals(signature);
}How to validate .nup files in Go
func IsNUP(data []byte) bool {
signature := []byte{0x4E, 0x55, 0x52, 0x55, 0x49, 0x4D, 0x47, 0x4E, 0x55, 0x52, 0x55, 0x50, 0x41, 0x4C}
if len(data) < 14 {
return false
}
return bytes.Equal(data[:14], signature)
}API Endpoint
/api/v1/nup
curl https://filesignature.org/api/v1/nup
Related Formats
Frequently Asked Questions
What is a .nup file?
A .nup file is a NUP file. The NUP file format is a specialized image and palette container developed for the Nuru terminal graphics specification. It is primarily utilized by digital artists to store character-based ANSI artwork and associated color palettes for display within terminal environments or retro-style applications. As a static binary format, it is considered safe from script-based vulnerabilities, although users should exercise standard precautions when opening files from unknown sources to avoid potential buffer overflow exploits in legacy software.
What are the magic bytes for .nup files?
The magic bytes for NUP files are 4E 55 52 55 49 4D 47 4E 55 52 55 50 41 4C at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .nup file?
To validate a .nup file, read the first bytes of the file and compare them against the known magic bytes (4E 55 52 55 49 4D 47 4E 55 52 55 50 41 4C) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .nup files?
The primary MIME type for .nup files is application/octet-stream.
Is it safe to open .nup files?
NUP (.nup) 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.