Portable JPEG Comment Editor

Portable JPEG Comment Editor is a very simple-to-use Windows program that allows you to quickly edit the comments of JPG image files. As the name implies, this is a portable app.

Portable app vs. installers

Since there is no installation involved, you can put the executable file in any place on the hard disk in order to use it. It is also possible to save Portable JPEG Comment Editor to a USB flash disk or similar storage unit, in order to easily work with it on any computer.
An important aspect to take into account is that the Windows registry and Start menu do not receive new entries (as it frequently happens with installers), thus there are no traces left behind after the app's removal.

Quick and simple-to-use application

Running the program pops up an error. Working with it is much simpler than that, actually. All you have to do is drag a JPG image file over the EXE item. This triggers a small window to pop up, where you can view the current comment.
Editing it is as simple as working with a word processor. When applying the new changes, the program automatically creates a new file while preserving all the other EXIF fields intact, including timestamp. It is possible to ask Portable JPEG Comment Editor to delete the original file, though.

Process only one JPG at once

The downside of Portable JPEG Comment Editor is that it does not support batch processing. Otherwise, it worked well during our evaluation, without causing Windows to hang, crash or dislay error messages. Although it has not been updated for a while, it runs smoothly on newer operating systems. CPU and RAM consumption was low.

Conclusion

To sum it up, Portable JPEG Comment Editor is extremely easy to handle when it comes to editing JPG comments while leaving the rest of the metadata intact.