DCR (.dcr)
.dcr file signature | application/octet-stream
Adobe Shockwave[83][84][85]
Magic Bytes
Offset 0
52 49 46 58 46 47 44 4D
Sources: Wikipedia
Extension
.dcr
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .dcr files in Python
def is_dcr(file_path: str) -> bool:
"""Check if file is a valid DCR by magic bytes."""
signature = bytes([0x52, 0x49, 0x46, 0x58, 0x46, 0x47, 0x44, 0x4D])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .dcr files in Node.js
function isDCR(buffer: Buffer): boolean {
const signature = Buffer.from([0x52, 0x49, 0x46, 0x58, 0x46, 0x47, 0x44, 0x4D]);
return buffer.subarray(0, 8).equals(signature);
}How to validate .dcr files in Go
func IsDCR(data []byte) bool {
signature := []byte{0x52, 0x49, 0x46, 0x58, 0x46, 0x47, 0x44, 0x4D}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
/api/v1/dcr
curl https://filesignature.org/api/v1/dcr
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .dcr file?
A .dcr file is a DCR file. Adobe Shockwave[83][84][85]
What are the magic bytes for .dcr files?
The magic bytes for DCR files are 52 49 46 58 46 47 44 4D at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .dcr file?
To validate a .dcr file, read the first bytes of the file and compare them against the known magic bytes (52 49 46 58 46 47 44 4D) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .dcr files?
There is no officially registered MIME type for .dcr files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .dcr files?
DCR (.dcr) 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.