I resize images quite a bit on a variety of different computers, including ones running both Windows and Mac OS X. On Windows I typically use an Explorer add-on like this one, but I had never taken the time to find something to use on my Mac. During some browsing around the web I recently stumbled upon a free utility, called ThumbsUp, that handles the job quite nicely though.
I’m sure a lot of you have seen the Mac image resizers that use a mixture of the Finder context menu and AppleScript, but this one is a bit different. It is a standalone app that you keep in the Dock. You can then resize just one or multiple images by dragging-and-dropping them onto the icon. The output is thrown into the same directory as the original images, which makes them easy to find.
You can also configure some of the settings by simply clicking on the icon. Doing so will bring up the same preference pane that is pictured to the right, and here’s a breakdown of the settings that are available:
- Extension inserted before (Prefix) or after (Suffix) the name of thumbnail files or name of subfolder where the new thumbnail files are stored.
- Image format of thumbnails (TIFF, JPEG, BMP, GIF, PNG or JPEG 2000).
- Quit when done (only if the application is launched by a drag-and-drop operation, otherwise the application displays the preferences panel).
- Create thumbnails – thumbnails with icons or only icons for the original files.
- Maximal width and height of thumbnail images, or scale images by percentage.
- Set the scaling to 100 percent to convert images to other formats.
- Compression – JPEG compression (the higher the quality is, the bigger the resulting files are).
- Antialiasing – No, low or high antialiasing of scaled thumbnails.
- Sharpen – Light, medium, strong or no sharpening of thumbnails.
This is a great app for anyone who regularly has to create thumbnails for images. The only option it lacks is a way to delete the original images if you wanted to, but this apps focus is more on creating thumbnails and not actually replacing the original image.
ThumbsUp Homepage (Mac only; Freeware)