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I’m using a combination of exiftool and Photo Supreme to add metadata (description, etc) to heic and dng images taken with my iPhone. I can see all of this information in Nitro when I select the image and open the EXIF pane.
When exporting the images as jpegs, I’m selecting “Include All” for metadata and writing them to a directory. But then checking the exported image revels that virtually none of the metadata is there.
% exiftool 2025-04-28-0001.jpg
ExifTool Version Number : 13.29
File Name : 2025-04-28-0001.jpg
Directory : .
File Size : 615 kB
File Modification Date/Time : 2025:05:19 21:49:40-04:00
File Access Date/Time : 2025:05:19 21:49:41-04:00
File Inode Change Date/Time : 2025:05:19 21:49:40-04:00
File Permissions : -rw-r–r–
File Type : JPEG
File Type Extension : jpg
MIME Type : image/jpeg
JFIF Version : 1.01
Exif Byte Order : Big-endian (Motorola, MM)
Orientation : Horizontal (normal)
X Resolution : 72
Y Resolution : 72
Resolution Unit : inches
Software : Nitro 2025.03
Tile Width : 512
Tile Length : 512
Color Space : sRGB
Exif Image Width : 960
Exif Image Height : 1280
Compression : JPEG (old-style)
Thumbnail Offset : 318
Thumbnail Length : 5438
XMP Toolkit : XMP Core 6.0.0
Rating : 1
Current IPTC Digest : d41d8cd98f00b204e9800998ecf8427e
IPTC Digest : d41d8cd98f00b204e9800998ecf8427e
Image Width : 960
Image Height : 1280
Encoding Process : Baseline DCT, Huffman coding
Bits Per Sample : 8
Color Components : 3
Y Cb Cr Sub Sampling : YCbCr4:2:0 (2 2)
Image Size : 960×1280
Megapixels : 1.2
Thumbnail Image : (Binary data 5438 bytes, use -b option to extract)I tried exporting from the iPad version and get the same result.
Am I doing something wrong in the export?
Metadata is a complicated topic. The EXIF button in Nitro invokes ExifTool which parses a different (larger) set of metadata from the libraries built into macOS, which is what Nitro uses for general display and also for export.
When exporting, the app creates a new file, so it needs to manually insert metadata for each key that it knows about. The list that Nitro uses is based on what macOS is able to read. If it’s a key that macOS doesn’t know about, then Nitro will not copy it over (because there is no way to do that). On the hand, there may be keys that macOS reads that Nitro doesn’t support, but that would be easy to add.
Please email me separately (at support@gentlemencoders.com) with the keys that you have set (and also a sample file) – I will see if these are ones that Nitro can insert into the exported file.
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