PicShrink
Hi!

PicShrink is an Android app to dynamically crop, adjust the resolution, and adjust the jpeg compression level of photos. Let's you easily prepare and attach small photos to emails. Features:
  • Invoke from any application that let's you select a file
  • Sliders to control resolution and jpeg compression level
  • Can pinch + zoom to browse specific regions of your photo while adjusting the sliders
Check out the Google Play page for more info and try it out!
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