00 / RasterFox
Available now · Version 3.2.0
Make image files
smaller
Drop in your images, choose a compression preset, and compare the result with the original before saving. RasterFox also enlarges small images and removes backgrounds. All processing runs on your Mac.
RasterFox — overview
01 / Features
Prepare images
for the web and sharing
Compress a single image or a whole batch, then check the quality before you save.
Smaller image files
Compress JPEG, PNG, WebP, and AVIF images. Adjust the settings to find a file size and quality that suit your project.
Three starting presets
Choose High Quality, Balanced, or Small Size. Pro lets you adjust the compression settings yourself.
Compare before and after
Check the compressed image beside the original. Zoom both views together to look closely at text, edges, and fine detail.
Compress a batch
Drop in several images and process them together. Pro supports unlimited batches and up to eight images at once.
Enlarge small images
Use AI upscaling to enlarge an image before exporting it. The free version includes 2× upscaling; Pro adds 3×, 4×, and more models.
Remove backgrounds
Isolate a subject before you save or share the image. Try five background removals in the free version, or remove as many as you need with Pro.
0x / Gallery
See RasterFox in action
Drop in images, run a batch, and compare the compressed result with the original.
0x / Pricing
One price, no subscription
Try every feature free for 14 days. Afterwards, keep Balanced compression, batches of three, 2× upscaling, and five background removals. Pro unlocks the remaining features for $9.99 once.
§ / Mac App Store
Bought RasterFox on the Mac App Store?
Your existing Pro purchase carries over. Leave the App Store copy installed and open the new app from its disk image first. It checks your purchase and unlocks Pro, then you can move it to Applications.
Keep your App Store copy until Pro is unlocked
Replacing the App Store app too early removes the purchase receipt needed to unlock Pro. Run the new app from the disk image first, then let it move to Applications.
- 01 Leave the App Store copy installed
- 02 Launch the new app from the downloaded disk image
- 03 It checks your App Store purchase and unlocks Pro
- 04 Let the app move itself to Applications
02 / Reviews
App Store reviews
Reviews from people who use RasterFox, quoted as written.
Last image optimizer you will ever need
“RasterFox is an incredibly fast and feature-rich image optimizer that you won't need another one for. It offers granular resizing control, specialized template renaming, smart background removal, compression, and incredible speed.”
Perfect replacement for ImageOptim
“I've been using RasterFox for a while now and it's quickly become my goto image optimizer. I used to rely on ImageOptim, but since that hasn't seen updates in ages, RasterFox has stepped in and taken its place without missing a beat.”
Trilby makes great products.
“I am a huge fan of Trilby products—well thought out and well executed.”
03 / FAQ
Frequently asked questions
Formats, pricing, and getting started.
JPEG, PNG, WebP, and AVIF. RasterFox can compress existing images and convert between formats. WebP output requires Pro after the trial.
Savings depend on the image, its format, and how much it has already been compressed. Higher compression can remove visible detail, so use the before-and-after preview to check the result before saving.
High Quality keeps more detail, Balanced trades some detail for a smaller file, and Small Size applies stronger compression. Balanced is included in the free version. Pro adds all presets and custom settings.
Every feature is available for 14 days, with no account or credit card required. Afterwards, the free version includes unlimited Balanced compression in batches of three, 2× upscaling, and five background removals. Pro costs $9.99 once and covers three Macs.
No. Leave your App Store copy installed, open the downloaded disk image, and run RasterFox from it before moving it to Applications. It reads your App Store purchase and unlocks Pro. You can request a permanent license key in the app for your other Macs.
The direct download checks for updates and installs them through the app. Homebrew users can update through Homebrew. The Mac App Store version still works, but no longer receives updates.
An Apple silicon Mac, M1 or later, running macOS 14 Sonoma or later. RasterFox does not currently run on Intel Macs.
The compression and upscaling components bundled with RasterFox are currently built for Apple silicon. An Intel version would need Intel builds of those components as well.
No. Compression, upscaling, and background removal run on your Mac. Update checks and license activation use the internet, but your images are not uploaded.
Yes. The free rasterfox command-line tool uses the same compression as the app. It works through whole folders at once and converts to WebP, AVIF, and JPEG XL, which makes it a good fit for build scripts and servers. Install it with Homebrew on a Mac or Linux: brew install skulkworks/tap/rasterfox-cli
04 / Download
Try it with your own images
Download RasterFox and see how much smaller you can make your images. Use the preview to check the quality before saving.
Apple silicon Mac required
brew install --cask skulkworks/tap/rasterfox
Version 3.2.0 · Apple silicon · macOS 14 or later · 14-day Pro trial, then a free version. · Changelog
05 / Contact
Get in touch
Have a question or a feature idea? Send a message below. For a bug report, include your macOS version, RasterFox version, and the steps that caused the problem.