UC2 (.uc2)
.uc2 file signature | application/x-uc2-compressed
UC2 is a legacy compressed archive format created by Ad Infinitum Software for UltraCompressor II. It was used to reduce file sizes and package documents or software for storage and transfer, with support in archival utilities and some older DOS-era applications. The format is largely obsolete, and while it is generally safe to inspect, modern tools may have limited support for opening or extracting its contents.
Magic Bytes
Offset 0
55 43 32 1A
Sources: Apache Tika
Extension
.uc2
MIME Type
application/x-uc2-compressed
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .uc2 files in Python
def is_uc2(file_path: str) -> bool:
"""Check if file is a valid UC2 by magic bytes."""
signature = bytes([0x55, 0x43, 0x32, 0x1A])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .uc2 files in Node.js
function isUC2(buffer: Buffer): boolean {
const signature = Buffer.from([0x55, 0x43, 0x32, 0x1A]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .uc2 files in Go
func IsUC2(data []byte) bool {
signature := []byte{0x55, 0x43, 0x32, 0x1A}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/uc2
curl https://filesignature.org/api/v1/uc2
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .uc2 file?
A .uc2 file is identified by the magic bytes 55 43 32 1A at byte offset 0. UC2 is a legacy compressed archive format created by Ad Infinitum Software for UltraCompressor II. It was used to reduce file sizes and package documents or software for storage and transfer, with support in archival utilities and some older DOS-era applications. The format is largely obsolete, and while it is generally safe to inspect, modern tools may have limited support for opening or extracting its contents.
What are the magic bytes for .uc2 files?
The magic bytes for UC2 files are 55 43 32 1A at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .uc2 file?
To validate a .uc2 file, read the first bytes of the file and compare them against the known magic bytes (55 43 32 1A) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .uc2 files?
The primary MIME type for .uc2 files is application/x-uc2-compressed.
Is it safe to open .uc2 files?
UC2 (.uc2) 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.