Exif Jpeg header manipulation toolVersion 3.04 Updated Nov 22 2019
Because I am interested in photography, I am always curious just exactly what settings my fully automatic digital camera actually did end up using. Back in 1999, when I originally wrote jhead, I couldn't find a program that would consistently display the settings, nor one that could be compiled into a simple executable. I have since added many more features to jhead, many of them the result of suggestions or code contributions. Though there are many programs out there now that can manipulate Exif headers today, for many tasks, jhead remains the simplest and most effective tool for the job, especially if used for automated or scripted tasks. Sample jhead output: File name : 0805-153933.jpg File size : 463023 bytes File date : 2001:08:12 21:02:04 Camera make : Canon Camera model : Canon PowerShot S100 Date/Time : 2001:08:05 15:39:33 Resolution : 1600 x 1200 Flash used : No Focal length : 5.4mm (35mm equivalent: 36mm) CCD Width : 5.23mm Exposure time: 0.100 s (1/10) Aperture : f/2.8 Focus Dist. : 1.18m Metering Mode: center weight Jpeg process : Baseline The program also has a lot of other command line options for manipulating Exif files, such as options to manipulate the date in the header, renaming image files, or coordinating running Jpegtran and Mogrify to manipulate whole directory trees of images. Here's the program files. Just right click and save as. For novice Linux/Unix/OS-X users: Don't forget to set the executable bit after downloading the pre-built executables. Type "chmod +x jhead" at a shell window after downloading it to do this.
As of Oct 5 2020, Jhead is on github:
There's also a change log
The software is public domain. A program this small is not worth bothering restricting anybody with, and I'm too lazy to look into the ramifications of GPL or BSD licenses. Besides, I hope more people integrate this sort of functionality into their programs, free or not free. Exif specifications at exif.org Got questions? Read the manual. If that doesn't answer your questions, you can contact me at: (If you want to include contact information, refer to this page's URL, but please don't post my email address in machine readable forms on the web) Other handy free utilities by Matthias Wandel:
Finddupe Identify and eliminate duplicate files. Useful when organizing other people's photos.
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