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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

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★ 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

Finally back in action!

This app does one thing, and does it better than any other app out there. I was bummed when the previous version didn't have Lion support, and tried several other apps that all had flaws and shortcomings. Thanks for bringing this bad boy back to life!

Moved to this after Retina2Normal Broke

I had been using Retina2Normal before, but it recently began crashing when trying to launch it. This app works even better and is more convienient than Retina2Normal! Goodbye pulling each png into gimp seperatly to resize them!

Time saver

Why did I not have this before. This will probably save me hours of time instead of resizing everything via Preview.

View in Mac App Store
  • Free
  • Category: Developer Tools
  • Updated: Sep 03, 2012
  • Version: 1.4
  • Size: 0.2 MB
  • Language: English
  • Seller: Bonobo Labs

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

Customer Ratings

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