Resize an image to 3:4 aspect ratio.
Drop your photos and download them in the 3:4 aspect ratio. Each photo keeps all its pixels at their own size; padding is added on the short side until the shape is 3:4, so nothing is cropped, enlarged or reduced. It runs in your browser; nothing is uploaded.
Choose the size.
Sizes come from each marketplace's own help pages, summarised in the guides (checked 24 September 2026).
Who asks for 3:4.
Lines from Herofab's platform guides that name the 3:4 aspect ratio, whether as a requirement, a recommendation or one of several accepted shapes. Each row links to the guide and its official source.
| Platform | Rule | What the guide says | Read |
|---|---|---|---|
| ABOUT YOU | Format | 3:4, upright, for model and bust images | 10 October 2026 |
| ABOUT YOU | Not allowed | Not accepted under any circumstances: bust views without a plain white or transparent background, images below 1,125 × 1,500 pixels, shoes or caps pointing the wrong way, and formats other than 3:4 that are blocked after automated cropping | 10 October 2026 |
| Faire | Apparel | Portrait recommended, which Faire writes as a 4:3 ratio (3:4 as width to height); optimal size 1,800 × 2,400 pixels | 8 October 2026 |
| Wix | Aspect ratio | 16:9, 3:2, 4:3, 1:1, 3:4, 2:3 or 9:16; 1:1 is the recommended ratio for mobile | 11 October 2026 |
| Ecwid | Aspect ratio | Ecwid names 1:1, 3:4, 4:3, 2:3 and 3:2 as the most appealing proportions, and asks for one aspect ratio and orientation across a product's gallery | 11 October 2026 |
| Temu | Apparel images | Apparel carousel images use a 3:4 aspect ratio, with a width of at least 1,340 pixels and a height of at least 1,785 pixels | 12 October 2026 |
| Reddit Ads | Mobile | Recommended resolutions are square 1:1 at 1,080 × 1,080, portrait 3:4 at 1,080 × 1,440, portrait 4:5 at 1,080 × 1,350, landscape 4:3 at 1,440 × 1,080 and landscape 16:9 at 1,920 × 1,080 pixels | 12 October 2026 |
| SHEIN | Site detail image | Optional, up to 10 images, with a 3:4 width-to-height ratio and more than 900 pixels | 12 October 2026 |
| AliExpress | Aspect ratio | 1:1 at 800 × 800 pixels or more, or 3:4 at 750 × 1,000 pixels or more; all images must keep the same aspect ratio | 12 October 2026 |
| AliExpress | Background | The white-background marketing image has a pure white or fully transparent background, at no less than 800 × 800 pixels and 1:1; the scene image has a solid colour or real scene background, at no less than 750 × 1,000 pixels and 3:4 | 12 October 2026 |
| Weebly | Aspect ratio | One ratio setting applies to all item photos; shapes are square (1:1), portrait (2:3 or 3:4) and landscape (3:2 or 4:3), and mixing them leads to odd cropping | 12 October 2026 |
From a phone photo to 3:4.
Common 12-megapixel phone photo shapes brought to 3:4: the size of the downloaded file and the padding added on each side (↔ left + right, ↕ top + bottom). The photo keeps its own pixels, so the output size follows the photo. The tool above uses the same calculation.
| Phone photo | Output size | Padding |
|---|---|---|
| 4,032 × 3,024 · 4:3 | 4,032 × 5,376 px | ↕ 1,176 + 1,176 px |
| 3,024 × 4,032 · 3:4 | 3,024 × 4,032 px | — |
| 4,032 × 2,268 · 16:9 | 4,032 × 5,376 px | ↕ 1,554 + 1,554 px |
| 2,268 × 4,032 · 9:16 | 3,024 × 4,032 px | ↔ 378 + 378 px |
| 3,024 × 3,024 · 1:1 | 3,024 × 4,032 px | ↕ 504 + 504 px |
3:4 in numbers.
- Aspect ratio
- 3:4
- Width ÷ height
- 0.75
- Orientation
- Portrait
Other aspect ratios.
3:4, answered.
Which platforms ask for the 3:4 aspect ratio?
ABOUT YOU, Faire, Wix, Ecwid, Temu, Reddit Ads, SHEIN, AliExpress, and Weebly. The table on this page gives each rule in full and links to the platform's guide.
What size is the image after resizing to 3:4?
It depends on the photo: its pixels stay and padding is added until the shape is 3:4. A 4,032 × 3,024 px phone photo becomes 4,032 × 5,376 px, with 1,176 px of padding at the top and 1,176 px at the bottom.
Is the photo scaled or cropped when resizing to 3:4?
Neither. The photo keeps every pixel at its original size and the padding colour fills the added area, so the whole product stays in frame and a small photo is not blurred by enlarging.
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