Digital camera JPG usingExchangeable Image File Format (.jpg)
.jpg file signature | image/jpeg
Digital camera JPG usingExchangeable Image File Format (EXIF)Trailer:FF D9(ÿÙ)See"Using Extended File Information (EXIF) File Headers in DigitalEvidence Analysis"(P. Alvarez,IJDE,2(3), Winter 2004) andExifTool Tag Names
Magic Bytes
Offset 0
FF D8
Sources: Gary Kessler, Neil Harvey FileSignatures
All Known Signatures
7 signature variants are documented for .jpg files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| FF D8 | 0 | Gary Kessler, Neil Harvey FileSignatures |
| FF D8 FF | 0 | Apache Tika |
| FF D8 FF DB | 0 | Wikipedia |
| FF D8 FF E0 | 0 | Wikipedia |
| FF D8 FF E0 4A 46 49 46 00 | 0 | Gary Kessler |
| FF D8 FF E1 45 78 69 66 00 | 0 | Gary Kessler |
| FF D8 FF E8 53 50 49 46 46 00 | 0 | Gary Kessler |
Extension
.jpg
MIME Type
image/jpeg
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .jpg files in Python
def is_jpg(file_path: str) -> bool:
"""Check if file is a valid JPG by magic bytes."""
signature = bytes([0xFF, 0xD8])
with open(file_path, "rb") as f:
return f.read(2) == signatureHow to validate .jpg files in Node.js
function isJPG(buffer: Buffer): boolean {
const signature = Buffer.from([0xFF, 0xD8]);
return buffer.subarray(0, 2).equals(signature);
}How to validate .jpg files in Go
func IsJPG(data []byte) bool {
signature := []byte{0xFF, 0xD8}
if len(data) < 2 {
return false
}
return bytes.Equal(data[:2], signature)
}API Endpoint
/api/v1/jpg
curl https://filesignature.org/api/v1/jpg
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .jpg file?
A .jpg file is a Digital camera JPG usingExchangeable Image File Format file. Digital camera JPG usingExchangeable Image File Format (EXIF)Trailer:FF D9(ÿÙ)See"Using Extended File Information (EXIF) File Headers in DigitalEvidence Analysis"(P. Alvarez,IJDE,2(3), Winter 2004) andExifTool Tag Names
What are the magic bytes for .jpg files?
The magic bytes for Digital camera JPG usingExchangeable Image File Format files are FF D8 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .jpg file?
To validate a .jpg file, read the first bytes of the file and compare them against the known magic bytes (FF D8) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .jpg files?
The primary MIME type for .jpg files is image/jpeg.
Is it safe to open .jpg files?
Digital camera JPG usingExchangeable Image File Format (.jpg) 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.