Lossless transformations of JPEG files
These functions are available in the extended version only:
Only Informator Pro:
Lossless JPEG functions 
Lossless transformation means that the image file is not opened and its compression is not touched. Only the data blocks are sorted in a new way. The image quality is preserved!
Rotation
90° CounterClockWise rotates the image to the left,
90° ClockWise rotates the image to the right
If the file is trimmed, edgedata from the bottom of the file is cleared.
180° rotation. If the file is trimmed, edgedata from the right and bottom of the file is cleared.
Flip
horizontally. If the file is trimmed, edgedata from the right side of the file is cleared.
vertically. If the file is trimmed, edgedata from the bottom of the file is cleared.
Mirror across diagonal axis
Transpose. Mirror across upper-left to lower-right axis. No trimming is needed.
Transversal transpose. Mirror across upper-right to lower-left axis. No trimming is needed.
Transformation options, chosable within the prefs:
Trim
The JPEG transformations may be affected if the image dimensions are not a multiple of 8 pixels (or 16 pixels, depending on the file). Because only complete blocks of data can be transformed, some transformations may leave untransformed parts of blocks at the edges. To clear these you should activate "trimming" within the preferences. Don't worry to much about loosing data with this function. All "out of camera" jpegs are divisible by 16.
Optimize coding
To get smaller sizes of data, the coding can be optimized. Optimized coding will take a little bit more time. The resulting file is no longer a standard baseline JPEG.
Progressiv JPEG
Progressive JPEG divides the file into a series of scans. The first scan shows the image at the equivalent of a very low quality setting, which takes very little space. Following scans gradually improve the quality.
Attention: Not all apps can handle progressive JPEGs.
Keep optional JPEG markers
You can chose to clear or keep the meta information (like Exif or IPTC data) in the transformed JPEG file.
Create previews
New previews and icons can be created automatically after a transformation if you activate this option.
Attention: Sometimes the new icon is not displayed cause the Finder does not refresh it. To log out and in often helps. Sorry, this is a known OS X bug we can't work around