OpenEXR bitmap image format (.exr)
.exr file signature | image/aces
OpenEXR bitmap image format
Magic Bytes
Offset 0
76 2F 31 01
Sources: Wikipedia, Gary Kessler
All Known Signatures
3 signature variants are documented for .exr files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| 76 2F 31 01 | 0 | Wikipedia, Gary Kessler |
| 76 2F 31 01 02 00 00 00 | 0 | Apache Tika |
| 76 2F 31 01 02 04 00 00 | 0 | Apache Tika |
Extension
.exr
MIME Type
image/aces
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .exr files in Python
def is_exr(file_path: str) -> bool:
"""Check if file is a valid EXR by magic bytes."""
signature = bytes([0x76, 0x2F, 0x31, 0x01])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .exr files in Node.js
function isEXR(buffer: Buffer): boolean {
const signature = Buffer.from([0x76, 0x2F, 0x31, 0x01]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .exr files in Go
func IsEXR(data []byte) bool {
signature := []byte{0x76, 0x2F, 0x31, 0x01}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/exr
curl https://filesignature.org/api/v1/exr
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .exr file?
A .exr file is a OpenEXR bitmap image format file. OpenEXR bitmap image format
What are the magic bytes for .exr files?
The magic bytes for OpenEXR bitmap image format files are 76 2F 31 01 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .exr file?
To validate a .exr file, read the first bytes of the file and compare them against the known magic bytes (76 2F 31 01) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .exr files?
The primary MIME type for .exr files is image/aces.
Is it safe to open .exr files?
OpenEXR bitmap image format (.exr) 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.