Lock the crop to the classic 4:3 ratio — still the right choice for iPad screens, slide decks, and retro-style photos.
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From the aspect ratio dropdown, choose 4:3. The crop box locks to that ratio so it can't drift to 16:9 or anything else.
Drag to reposition the 4:3 frame. Resize from any corner — the ratio stays locked at exactly 4:3.
Click Download. The output is exactly 4:3 (e.g., 1024×768 for a classic slide or 2048×1536 for an iPad screen).
4:3 is the older, more square-ish ratio (≈1.33:1) used by classic TVs, early monitors, and iPads. 16:9 is the modern widescreen ratio (≈1.78:1) used by HD video and current laptops. 4:3 is taller for the same width.
Whenever your target display or surface is 4:3: iPad screens (2048×1536), classic presentations, projectors in older meeting rooms, embedded device UIs, and any retro / vintage aesthetic that benefits from the squarer frame.
The most common 4:3 sizes are 640×480 (VGA), 800×600 (SVGA), 1024×768 (XGA), 1600×1200 (UXGA), and 2048×1536 (iPad Retina). Every one of those is a perfect 4:3.
Apple chose 4:3 so the iPad would feel like a paper page or magazine in portrait, and would still show a sensible amount of web content in landscape. Most reading and document workflows look more natural on 4:3 than on a 16:9 widescreen.
Modern projectors and laptops are 16:9, so default slides should be 16:9. Switch to 4:3 only when you know the display, projector, or printout is 4:3 — for example, older conference room projectors or square handouts.