How to Optimize Images for the App Store

App Store screenshot requirements

Device	Size (pixels)	Required format
iPhone 6.7″	1290 × 2796	PNG or JPEG
iPhone 6.5″	1242 × 2688	PNG or JPEG
iPad Pro 12.9″	2048 × 2732	PNG or JPEG
Mac	1280 × 800 or 1440 × 900	PNG or JPEG

Why optimize App Store images?

App Store screenshots exported from design tools (Figma, Sketch, Xcode) are often much larger than necessary. Unoptimized PNGs at Retina resolution can easily be 5–10 MB each. This slows down App Store Connect uploads and adds unnecessary weight to your submission.

Compressing screenshots before uploading reduces file sizes significantly while keeping the visual quality Apple requires.

Step-by-step with TrimrPix

1. Export screenshots from your design tool at the required resolution
2. Drag all screenshots into TrimrPix
3. Set quality to 90–95% for App Store (high quality needed)
4. Click Optimize
5. Upload the compressed screenshots to App Store Connect

Compression tips for developers

• Keep quality high (90–95%) — App Store images are viewed at full resolution and scrutinized during review
• PNG is recommended for screenshots — TrimrPix optimizes PNG losslessly, removing unnecessary metadata and reducing size
• Use batch mode to optimize all device sizes at once — iPhone, iPad, and Mac screenshots in one pass
• For marketing web images (not the App Store itself), consider WebP for even smaller files

Beyond screenshots

App Store optimization isn't just about screenshots. App icons, promotional artwork, and marketing materials for your website all benefit from compression. For web-focused images, see How to Compress Images for Your Website.

Need to process all your assets at once? Use batch compression to handle everything in one step.