Convert an image to 3:4 ratio
3:4 is the portrait version of the classic 4:3 ratio — taller than wide, but not as extreme as 9:16. It is a common requirement for app store screenshot listings on older device specs, and a natural fit for portrait-oriented book covers and vertical posters where you want some width, not just a tall sliver.
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How to convert your image to 3:4 ratio
Upload your image using the tool above.
For screenshots, pad mode is usually the safer choice if your UI has elements close to the screen edges — it keeps everything visible by adding a thin border rather than trimming.
For portrait photos being adapted to book covers, crop mode centered on the subject works cleanly.
Download as PNG for screenshots and graphics, JPEG for photos.
Why do you need to convert to 3:4 ratio?
App store screenshot requirements and portrait book covers both center on the 3:4 ratio. Submitting a screenshot at the wrong ratio means the store either rejects it or crops it unpredictably. Book cover templates from most print-on-demand services also default to portrait shapes close to 3:4. Getting the ratio right before uploading avoids a back-and-forth resize loop.
Common pixel sizes for this ratio (3:4)
Where this ratio is used
- App Store and Google Play screenshot listings (older tablet specs)
- Portrait-oriented book and e-book covers
- Vertical posters and flyers with moderate (not extreme) height
- Magazine-style portrait editorial images
Crop or pad — which should you use for this ratio?
A centered screenshot or photo with nothing critical right at the top or bottom edge crops well to 3:4. For app screenshots specifically, padding tends to be the safer call whenever UI elements — a status bar, a button — sit flush against the edge, since those are easy to lose in a crop.
How this ratio compares to a similar one
3:4 vs 9:16: 3:4 keeps more width relative to its height, which matches older tablet specs; 9:16 stretches much further vertically to match modern phone screens. Check your app store listing's current device requirements, since some stores still ask for both sizes across different device categories.
Frequently asked questions
How is 3:4 different from 9:16 for app screenshots?
9:16 matches modern tall phone screens, while 3:4 matches older tablet aspect ratios (like the original iPad). Check which device specs your app store listing currently requires before choosing.
Is 3:4 the same as 4:3 rotated?
Yes — 3:4 is simply 4:3 turned 90 degrees, used when the content is naturally portrait-oriented rather than landscape.
What's the difference between 3:4 and 2:3 for a book cover?
2:3 is taller and narrower than 3:4. 3:4 gives a slightly squarer, more compact cover shape, while 2:3 is closer to traditional paperback proportions — both are used depending on the publisher's house style.
Do both Apple App Store and Google Play accept 3:4 screenshots?
Both accept multiple screenshot sizes depending on device category; 3:4 specifically matches older iPad and tablet specifications. Always confirm against each store's current screenshot size requirements before submitting, since these are updated periodically.
Is 3:4 a common ratio for digital magazine layouts?
Yes, especially for cover images and full-page editorial photography, where 3:4 gives a slightly more compact, page-like feel compared to taller ratios like 2:3.