NUP (.nup)
.nup file signature | application/octet-stream
NUP is a file format created and maintained by the Nuru project for storing ASCII and ANSI artwork together with palette data. It is used by Nuru-compatible editors and viewers to save text-mode graphics, color configurations, and related image resources. The format is generally safe to open, though it is a legacy niche format and support may be limited in modern applications.
Magic Bytes
Offset 0
4E 55 52 55 49 4D 47
Sources: Wikipedia
All Known Signatures
2 signature variants are documented for .nup files across multiple sources.
Extension
.nup
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
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])
with open(file_path, "rb") as f:
return f.read(7) == signatureHow to validate .nup files in Node.js
function isNUP(buffer: Buffer): boolean {
const signature = Buffer.from([0x4E, 0x55, 0x52, 0x55, 0x49, 0x4D, 0x47]);
return buffer.subarray(0, 7).equals(signature);
}How to validate .nup files in Go
func IsNUP(data []byte) bool {
signature := []byte{0x4E, 0x55, 0x52, 0x55, 0x49, 0x4D, 0x47}
if len(data) < 7 {
return false
}
return bytes.Equal(data[:7], signature)
}API Endpoint
/api/v1/nup
curl https://filesignature.org/api/v1/nup
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .nup file?
A .nup file is identified by the magic bytes 4E 55 52 55 49 4D 47 at byte offset 0. NUP is a file format created and maintained by the Nuru project for storing ASCII and ANSI artwork together with palette data. It is used by Nuru-compatible editors and viewers to save text-mode graphics, color configurations, and related image resources. The format is generally safe to open, though it is a legacy niche format and support may be limited in modern applications.
What are the magic bytes for .nup files?
The magic bytes for NUP files are 4E 55 52 55 49 4D 47 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) 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?
There is no officially registered MIME type for .nup files. Systems typically use application/octet-stream as a generic fallback when handling this format.
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.