Thomas Schulte

The plugin affects the image while it is uploaded. Straight 
after it is uploaded, all Exif data will be removed from the image. 
There is no original image left, nor made a backup. 
This plugin uses the removal service of http://www.exif-remove.de .
ATTENTION: This service is intended to save your privacy and 
should not be used for illegal activity like copyright violations. 
You are allowed to use this service for legal activity only, 
this includes that you must have the explicit permission 
from the holder of rights to clean a file with this plugin! 
As of now, to prevent abuse, the eventually existing 
copyright information will be kept inside the cleaned image. 
To disable this plugin temporarily, just deactivate it within the 
Exif-Remove settings menu. Thanks.

Exif-Remove

This plugin removes Exif data from uploaded images automatically.

Sami Falah

WP Strip Image Metadata is a privacy focused WordPress plugin that helps in removing potentially sensitive metadata from your uploaded images.
What is image metadata?
Image metadata is extra information embedded in image files. This information is stored in a variety of formats and contains items like the model of the camera that took a photo.
However, image metadata may also contain identifying information such as the GPS location coordinates of an image taken with a smartphone for example.
This plugin provides an easy enabled/disabled setting so you can make the call on when image metadata should be removed.
Note: this plugin requires the “Imagick” or “Gmagick” PHP extension to function.

WP Strip Image Metadata

Excellent plugin, simple and to the point. Confirmed it works perfectly via the "Edit more details" link when viewing an image in the media gallery.

Great plugin

Strip image metadata on upload or via bulk action, and view image EXIF data.

Exif-Remove vs WP Strip Image Metadata