If you want to remove metadata from JPEG files, you should keep in mind that these data can provide useful information (such as focal length, shutter speed, etc.). Therefore, you should never remove them from your original pictures. Instead, you should make a copy of the picture you want to publish and then remove the metadata from this copy.
Several software tools support the removal of metadata. A recommendable one is jhead. It is a free open source program that runs on a variety of operating systems (Windows/Linux/BSD/Mac). Because jhead is a command line tool, it is particularly suitable to be used with batch files.
Less experienced users should adhere to this step-by-step guide (Windows):
1- Create the directory C:\jpeg.
2- Copy all pictures whose metadata you want to remove to C:\jpeg.
3- Download the program file jhead.exe to C:\jpeg.
4- Click on "Start" and then "Execute...".
5- Windows 95/98/Me: Type command.com and click on "OK".
Windows NT/2000/XP: Type cmd.exe and click on "OK".
6- Change to C:\jpeg. To do so, type the following (the words in brackets are instructions to be executed, not to be typed):
c: (press return)
cd\ (press return)
cd jpeg (press return)
7- To remove all metadata of all JPEG files in "C:\jpeg", type:
jhead -purejpg * (press return)
If you prefer programs with a graphical user interface, you should try IrfanView. It is a free program for Windows that allows you to view and edit images. Besides IrfanView itself, you need the plug-in "Lossless JPG Transformations". More detailed information about how to install this plug-in can be found on IrfanView's homepage.
Less experienced users should stick to these instructions:
1- Download IrfanView and its plug-ins and install them.
2- Create the directory C:\jpeg.
3- Copy all pictures whose metadata you want to remove to C:\jpeg.
4- Start IrfanView. In its menu bar, click on "File" and then "Thumbnails".
5- A new window has opened. In its left column, select C:\jpeg. The right column will now show small preview images of all pictures of C:\jpeg.
6- Select all pictures. To do so, click on "Options" in the menu bar of the new window and then "Select all".
7- In the same menu bar, click on "File", "JPG Lossless Operations" and then "Lossless transformation with selected thumbs...".
8- A new window has opened. In the section "Transformation", select "None (can be used for optimizing and cleaning)".
9- In the section "JPG APP marker options", select "Clean all APP markers".
10- Finally, click on "Start"
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