What’s coming

Convert in batches

Drag in photos or whole folders and convert them all with one set of settings. Photos are processed one at a time, so even large batches won’t overload your Mac.

Right from Finder

Right-click your photos in Finder, or press ⌃⌥⌘X, to open a preview and settings panel. Or convert instantly with your saved settings, without even opening the app.

Eight output formats

Save as JPEG, PNG, HEIC, WebP, AVIF, JPEG XL, TIFF or JPEG 2000, using Apple’s encoders or the open-source ones.

Aim for a quality score

Pick a SSIMULACRA2 target and pXL Crunch finds the setting that gets closest, then reports the score it actually reached.

Resize as you go

Set a maximum length for the longest edge. Proportions are kept, and smaller images are never enlarged.

Your originals stay put

pXL Crunch never replaces a file. Converted copies are saved next to the original, or in a folder you choose, with “‑converted” added to the file name.

Built-in and open-source encoders

JPEG, PNG, HEIC and TIFF work right away. The other formats use the same free, open-source encoders as pXL Compare, which you install once with Homebrew.

brew install jpeg-xl libavif webp libheif jpeg-turbo exiftool

JPEG 2000 needs a libheif build that includes its OpenJPEG plugin.

Its companion app

  • Free

    A free Mac app that encodes one image four ways and shows the results in a single split view, with file size, speed and quality scores for each.