Digital camera JPG usingExchangeable Image File Format magic bytes (.jpg)
.jpg file signature: FF D8 | image/jpeg
Category: Images
JPEG (JPG) is a raster image file format developed by the Joint Photographic Experts Group and standardized by ISO/IEC for compressing digital photographs and other continuous-tone images. It is commonly used for camera photos, web graphics, email attachments, and general image exchange across operating systems and devices. The format is widely supported and generally safe, though malformed files or decoder vulnerabilities can occasionally affect image viewers and libraries.
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 |
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.
Related Formats
Frequently Asked Questions
What is a .jpg file?
A .jpg file is a Digital camera JPG usingExchangeable Image File Format. JPEG (JPG) is a raster image file format developed by the Joint Photographic Experts Group and standardized by ISO/IEC for compressing digital photographs and other continuous-tone images. It is commonly used for camera photos, web graphics, email attachments, and general image exchange across operating systems and devices. The format is widely supported and generally safe, though malformed files or decoder vulnerabilities can occasionally affect image viewers and libraries.
What are the magic bytes for .jpg files?
The magic bytes for Digital camera JPG usingExchangeable Image File Format (.jpg) files are FF D8 at byte offset 0. These bytes identify the file format more reliably than the extension alone.
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.