Test data: https://code.google.com/archive/p/imagetestsuite/downloads
Supported File Formats
| Supported | Name | Extensions | Information | Exif |
|---|---|---|---|---|
| [] | JPEG | .jpg .jpeg .jpe .jif .jfif .jfi | ----------- | |
| [] | JPEG 2000 | .jp2 .j2k .jpf .jpm .jpg2 .j2c .jpc .jpx .mj2 | ----------- | |
| [] | JPEG XL | .jxl | ----------- | |
| [] | PNG | .png | ----------- | |
| [] | WebP | .webp | ----------- | |
| [] | HEIF | .heif .heifs .heic .heics .avci .avcs .avif .hif | ----------- | |
| [] | AVIF | .avif | ----------- | |
| [] | TIFF | .tiff .tif | ----------- | |
| [] | BMP | .bmp .dib | ----------- |
EXIF makes use of APPn headers, the two supported are APP1 and APP2 or COM, any other APPn is not part of EXIF.
File Start:
- FF D8 (JPEG)
- FF E1 58 45 45 78 69 66 (JPEG EXIF)
- 00 00 (NULL Bytes)
TIFF Header
- 4D 4D (Big Endian) || 49 49 (Little Endian)
- 00 2A
- XX XX XX XX (Offset of IFD) [If immediately after the TIFF header this value is 00 00 00 08, for 8 bytes from file or EXIF start]