Step 1: Choose a base image

For best results, use a square PNG or JPG of at least 1024×1024 pixels. Transparent icon artwork works especially well.

Runs entirely in your browser

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Drag an image here or click to select

Supports PNG, JPG, WebP and more. Images larger than 30MB are not recommended for memory reasons.

Step 2: Preview the image

The generator will render multiple PNG icon sizes on a transparent square canvas and pack them into a single ICNS file.

Preview

16×16, 32×32, 64×64, 128×128, 256×256, 512×512 and 1024×1024 pixels, all embedded as PNG resources in one ICNS file.

Click the button below to render multiple icon sizes and bundle them into an ICNS file locally in your browser, then download it.

The following icon sizes will be generated:

16×16, 32×32, 64×64, 128×128, 256×256, 512×512 and 1024×1024 pixels, all embedded as PNG resources in one ICNS file.

Upload Image: Click or drag a PNG/JPG image (1024x1024 recommended).
Preview: The system automatically generates previews for multiple sizes (16x16 to 1024x1024).
Generate: Click 'Generate ICNS file' to package the icons locally in your browser.
Download: Once ready, click the download button to get your .icns file for macOS app development or folder customization.

ICNS is the standard icon container format for macOS, storing multiple icon sizes in a single file.
Folder Icon Tip: To customize a folder icon, right-click a folder and select 'Get Info'. Then drag your downloaded .icns file onto the small icon in the top-left corner of the info window.
This tool runs entirely in your browser; no image data is sent to any server.