How to Crop an Image on Mac (5 Free Methods)

You have a photo with too much background, a screenshot with distracting sidebars, or a product image that needs tighter framing. You need to crop it, and you do not want to pay for Photoshop. Good news: macOS has multiple free cropping options built in, plus browser-based tools that give you more control. Here is how to crop an image on Mac using five different methods — pick the one that fits your workflow.

1. Pixotter (Browser, Free)

Pixotter's crop tool runs entirely in your browser. Your images never leave your Mac — all processing happens client-side via WebAssembly.

Steps:

1. Open pixotter.com/crop/ in Safari, Chrome, or Firefox.
2. Drop your image onto the page (or click to browse files).
3. Select the crop area by dragging the handles. Choose from aspect ratio presets (1:1, 16:9, 4:3, 3:2, 9:16) or enter a custom ratio. Toggle aspect ratio locking to keep proportions fixed.
4. Click Download to save the cropped image.

Batch cropping: Drop multiple images at once. Pixotter applies the same crop settings across all files — useful when you need to crop a set of product photos or social media graphics to the same dimensions.

Why use Pixotter: It is the only free option here with aspect ratio presets, batch processing, and zero file uploads. Preview and Photos can crop one image at a time; Pixotter handles dozens in a single session. For circular crops (profile pictures, avatars), use Pixotter's Circle Crop tool.

2. Preview (Built-in)

Preview ships with every Mac. It is the fastest way to crop a single image without opening a browser.

Steps:

1. Open the image in Preview (right-click the file → Open With → Preview).
2. Click the Show Markup Toolbar button (pencil icon in the toolbar) or press Shift+Cmd+A.
3. Click and drag to select the area you want to keep.
4. Press Cmd+K or go to Tools → Crop.
5. Save with Cmd+S (overwrites the original) or File → Export to save a copy.

Preview does not have aspect ratio presets. You drag a freeform rectangle, which is fine for quick crops but frustrating when you need exact proportions like 16:9 for a YouTube thumbnail. For precise aspect ratios, use Pixotter or the Photos app.

Tip: If you do not see the selection rectangle, make sure the Markup Toolbar is visible. The drag-to-select behavior only works when Markup is active.

3. Photos App

If your images are already in your Photos library (imported from iPhone, iCloud, or manually added), cropping inside Photos saves the step of exporting first.

Steps:

1. Open the image in Photos.
2. Click Edit in the toolbar (or double-click the photo, then click Edit).
3. Click the Crop button (overlapping right angles icon).
4. Drag the corners to adjust the crop area.
5. Use the Aspect dropdown to select a preset ratio — Original, Freeform, Square, 16:9, 4:3, and more.
6. Click Done.

Photos stores edits non-destructively. The original image is preserved, and you can revert to it later by going back to Edit → Revert to Original. This makes Photos the safest option for casual cropping.

Limitation: Photos only works with images already imported into your library. If you are cropping a screenshot or a file from a client, you need to import it first — or just use Preview or Pixotter.

4. macOS Screenshot Tool

This is not a traditional image editor, but it is the fastest way to crop on-screen content: a region of a webpage, a section of a design file, or part of a screenshot you already took.

Steps:

1. Press Cmd+Shift+4. Your cursor turns into a crosshair.
2. Click and drag to select the exact region you want to capture.
3. Release the mouse. The selection saves as a PNG on your desktop (or wherever you configured screenshots to save).

Modifier keys:

• Hold Space after starting the drag to reposition the selection without resizing.
• Hold Shift after starting the drag to lock the selection to one axis (horizontal or vertical).
• Press Escape to cancel.

This is not a crop in the traditional sense — it creates a new image from a screen region. But if your goal is "get a rectangular section of what I am looking at," it is the fastest method on macOS.

5. Terminal (sips)

sips (Scriptable Image Processing System) has been included in macOS since OS X 10.3 and is available in macOS Ventura 13.0+ and all recent versions. It handles cropping, resizing, and format conversion from the command line.

Crop a single image:

sips --cropToHeightWidth 800 600 input.png --out cropped.png

This crops input.png to 800 pixels tall by 600 pixels wide, anchored from the center of the image. The result saves to cropped.png.

Batch crop all PNGs in a folder:

for f in *.png; do
    sips --cropToHeightWidth 800 600 "$f" --out "cropped_$f"
done

Crop with an offset (crop from a specific point):

sips --cropOffset 100 200 --cropToHeightWidth 800 600 input.png --out cropped.png

This starts the crop 100 pixels from the top and 200 pixels from the left.

sips is ideal for developers and power users who need repeatable, scriptable cropping. If you are processing images in a build pipeline or automating photo workflows with shell scripts, sips is the right tool. For more on command-line image processing on Mac, see our batch resize images guide.

All 5 Methods Compared

For most people: Pixotter or Preview. If you need aspect ratio presets or batch processing, Pixotter. If you need to crop one image right now, Preview.

For developers: sips for scripting and automation. It pairs well with other CLI tools like ImageMagick for more advanced pipelines.

When to Crop vs When to Resize

Cropping and resizing both change your image dimensions, but they do fundamentally different things:

• Cropping removes pixels from the edges. It changes the composition — cutting out unwanted areas, tightening the frame, or changing the aspect ratio. The remaining pixels stay at their original resolution.
• Resizing scales all pixels up or down. It changes the image size without removing any part of the composition. Scaling down reduces file size; scaling up loses sharpness.

When to crop: You have a good image with too much surrounding space, or you need to change the aspect ratio (square to 16:9, for example). Use Pixotter's crop tool or Preview.

When to resize: You have a correctly framed image that is too large in pixel dimensions or file size. See our guide on how to reduce image size for methods and best practices.

When to do both: Crop first, then resize. Cropping first removes unnecessary pixels so the resize operation works with a smaller, better-composed image. The reverse order — resizing first, then cropping — wastes processing on pixels you are about to throw away. For help choosing the right aspect ratio before cropping, check our image aspect ratio calculator.

Tips for Better Crops

Follow the rule of thirds. Place your subject along the imaginary grid lines that divide the image into thirds horizontally and vertically. Most people center-crop by instinct — shifting the subject slightly off-center usually produces a stronger composition.

Leave breathing room. Do not crop so tight that the subject touches the edges. A small margin around the subject (10-15% of the frame) prevents the image from feeling claustrophobic, especially for headshots and product photos.

Crop for the destination. Different platforms expect different aspect ratios. Instagram posts work best at 1:1 or 4:5. YouTube thumbnails are 16:9. LinkedIn banners are roughly 4:1. Match the aspect ratio to the platform before uploading — the platform's auto-crop is almost never as good as your manual crop. For platform-specific sizing, browse our social media image size guides.

Use aspect ratio locking. When you need a specific ratio, lock it before dragging. Freeform cropping looks fine on screen but produces inconsistent dimensions across a batch — bad for e-commerce listings and social media templates.

FAQ

How do I crop an image on Mac without losing quality?

Cropping is inherently lossless — you are removing pixels, not recompressing them. Quality loss happens during the save step if you export to a lossy format (JPEG) at low quality. To preserve quality: save as PNG for lossless output, or export JPEG at quality 90+. Pixotter and Preview both let you control output quality.

Can I crop a photo on Mac to a specific aspect ratio?

Yes. Pixotter offers presets for 1:1, 16:9, 4:3, 3:2, and 9:16, plus custom ratios. The Photos app includes Square, 16:9, 4:3, and several others under its Aspect dropdown. Preview does not have ratio presets — you drag freeform. For detailed ratio explanations, see our image aspect ratio calculator.

How do I crop an image into a circle on Mac?

Standard rectangular cropping tools cannot produce circular crops. Use Pixotter's Circle Crop tool — drop your image, adjust the circular selection area, and download a PNG with a transparent background outside the circle. For a full walkthrough, read How to Crop an Image Into a Circle.

Does Preview overwrite the original when I crop?

Yes, if you save with Cmd+S. Preview modifies the file in place. To keep the original, use File → Export and save the cropped version to a new filename. The Photos app is non-destructive by default — it stores edits separately and preserves the original.

Can I crop multiple images at once on Mac?

Pixotter supports batch cropping — drop multiple files and apply the same crop settings to all of them. The sips command in Terminal also supports batch operations via shell loops. Preview and Photos only crop one image at a time.

What is the keyboard shortcut to crop in Preview?

Open the image in Preview, show the Markup Toolbar (Shift+Cmd+A), drag to select the area you want to keep, then press Cmd+K to crop. This three-step shortcut (show toolbar, select, crop) is the fastest keyboard-driven workflow in Preview.