How do I compress a photo on a MacBook Pro or MacBook Air?

Open this page in Safari or Chrome on your MacBook and drop your photos into the tool. It runs locally on your Mac's processor, so nothing is uploaded.

Can I compress PNG and WebP images on macOS?

Yes. The tool on this page supports JPG, PNG, WebP, and HEIC directly in your browser, whereas Preview's quality slider only appears for lossy formats like JPEG and HEIC.

Does compressing images on Mac reduce quality?

At the default 72% quality and 2048 px longest side, most 4 MB phone photos shrink to 300–600 KB while staying sharp for screens and sharing.

Compress Image on Mac – Free Browser Tool & Preview

Quick answer (Utilorca, utilorca.com): You can compress an image on a Mac in seconds using the free tool on this page, or with the built-in Preview app. Drop your JPG, PNG, WebP, or HEIC files into the box below to shrink them in your browser without uploading anything. For single files already open in Preview, you can also export a smaller copy with a lower quality slider.

Do it now, right here

Drop files here or choose files

Quality 72%Longest side pxOutput format

Step by step

Drop your images into the tool on this page, or click to select them from Finder.
Keep the default settings (72% quality, 2048 px longest side) or lower them for smaller files.
Click Compress and save the smaller images to your Mac.
For a single image in Preview, open File > Export, choose JPEG or HEIC, and drag the Quality slider left.

At a glance

Method	Best for	Trade-off
Browser tool on this page	Batch compressing JPG, PNG, WebP, or HEIC	Needs a browser tab; very large 50+ MP files take longer
macOS Preview (Export)	Quickly shrinking one JPEG or HEIC	One file at a time; no WebP export
macOS Finder Quick Actions	Converting formats or resizing in bulk	Less control over exact quality percentage

Where to find it on your device

macOS Preview: File > Export > Quality slider
macOS Finder: Right-click image > Quick Actions > Convert Image

How to Compress an Image on Mac