This is an easy to use but powerful image editor. It supports "layers". Imagine GIMP/Photoshop "light" - most of the features non-professionals need to create awesome images.

This incredible software is originally the amazing work of Mark Pazolli and many others (see the credits in the user guide).

I've cleaned it up to work with the latest OS versions, made some UI updates, some performance and usability improvements, and released it to the world via the App Store !

Join the open-source effort at

Seashore will always be free.

Please post your honest rating & review to keep the developer motivated and the project alive.

Robert Engels

What’s New

Version 2.5.7

increase maximum image dimensions to 16k (h/w) as a stop-gap for issue #117

Ratings and Reviews

4.5 out of 5
46 Ratings

46 Ratings

Jim Beteen ,

Real time saver

This is a compact app that does precisely what I need. When I copy my large CD collection into iTunes, this allows me to take non-square CD covers and using the eye dropper in the foreground and the bucket in the background, fix CD covers to be square without distorting them, I just add some color that is already in the art work, and in a couple steps, square off the cover.


Super Krate ,

Longtime user

I’ve been using Seashore since about 2005. Its one of the first things I install on a new Mac. It is the tool that I use to resize, rotate, and adjust the quality/compression of my photos and images from the Internet. Seashore starts up and runs fast, is completely free, and works quite well.

welshport ,

Appreciative longterm user

I don't know when I first started using Seashore, I just know that it was a long time ago before it came to the App Store. It works well and accomplishes the functions that I want for image manipulation without a glut of features. I'm pleased to see it still being suported.


Robert Engels
8.2 MB

OS X 10.7 or later, 64-bit processor



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.