XLR (.xlr)
.xlr file signature | application/x-tika-msworks-spreadsheet
Magic Bytes
Offset 0
D0 CF 11 E0 A1 B1 1A E1
Sources: Apache Tika
Extension
.xlr
MIME Type
application/x-tika-msworks-spreadsheet
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .xlr files in Python
def is_xlr(file_path: str) -> bool:
"""Check if file is a valid XLR by magic bytes."""
signature = bytes([0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .xlr files in Node.js
function isXLR(buffer: Buffer): boolean {
const signature = Buffer.from([0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1]);
return buffer.subarray(0, 8).equals(signature);
}How to validate .xlr files in Go
func IsXLR(data []byte) bool {
signature := []byte{0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
/api/v1/xlr
curl https://filesignature.org/api/v1/xlr
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .xlr file?
A .xlr file is a XLR file.
What are the magic bytes for .xlr files?
The magic bytes for XLR files are D0 CF 11 E0 A1 B1 1A E1 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .xlr file?
To validate a .xlr file, read the first bytes of the file and compare them against the known magic bytes (D0 CF 11 E0 A1 B1 1A E1) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .xlr files?
The primary MIME type for .xlr files is application/x-tika-msworks-spreadsheet.
Is it safe to open .xlr files?
XLR (.xlr) 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.