Mac App Store

Mac App Store is the simplest way to find and download apps for your Mac.

To download Resizer from the Mac App Store, you need a Mac with OS X 10.6.6 or later. Learn More.


By Bonobo Labs

Open the Mac App Store to buy and download apps.


★ Formerly Unretina / Unretiner, this is the original, and most popular resize app for developers! (Name changed at Apple's request).

Develop iOS apps? Easily resize your @2x or -hd cocos2d images in seconds! Great for testing out non retina devices before the big painful export from Photoshop.

Supports .png .jpg .tif and .bmp.

To use simply drag @2x or -hd named images (or a folder containing the images) onto the application, choose an output folder and you are done!

Remember that Resizer is great for some images, but nothing beats recreation.

We've had some great requests for features for Version 2:
* AppleScript Support (Automatically convert a folder when files appear)
* Sharpness Filter
* Other (better quality) scaling methods
* Drop files onto icon
* Settings to default to same folder and hide the message box.

Let us know what you'd like to see!

For more kickass apps and tips for developers, follow @Bonobo on Twitter.

What's New in Version 1.4

Lion / Mountain Lion Support
Name changed from Unretina/Unretiner to Resizer.


Screenshot 1

Customer Reviews

Wahoo! Great to see you back!

The best resizer app is back. I've been through some other utilities whilst Unretina/er was not Lion friendly (and I could never get the compilable version working) but I'm really happy to see Resizer back in active development and will be jumping straight back to it as my preferred UI asset production tool for iOS. You'll always be Unretina/er to me though. :-)

Incorrectly handles files with spaces in the name

That completes my list of issues with this app. So, yeah, four stars it is.

View in Mac App Store
  • Free
  • Category: Developer Tools
  • Updated:
  • Version: 1.4
  • Size: 0.2 MB
  • Language: English
  • Developer:

Compatibility: OS X 10.7 or later, 64-bit processor

Customer Ratings

Current Version:
All Versions: