Resize an image to 300 × 300 px.
Drop your photos and download them at exactly 300 × 300 pixels. Each photo is fitted inside that size and padded, so the product is never cut. 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 300 × 300 px.
Lines from Herofab's platform guides that name 300 × 300 px, whether as a recommendation, a minimum or a limit. Each row links to the guide and its official source.
| Platform | Rule | What the guide says | Read |
|---|---|---|---|
| Google Ads | Square | 1:1 — 1,200 × 1,200 pixels recommended, 300 × 300 minimum, in Performance Max and Demand Gen; Performance Max requires square images | 12 October 2026 |
| Etsy shop banner | Collage banner | Each image must be at least 600 × 300 pixels for 2 images, 400 × 300 pixels for 3 images and 300 × 300 pixels for 4 images; available to Etsy Plus subscribers only | 12 October 2026 |
| Reddit Ads | Thumbnail | Recommended landscape 4:3 at 400 × 300 pixels; square 1:1 at 300 × 300 and landscape 16:9 at 400 × 225 pixels are acceptable; maximum file size 3 MB; shown only in conversation placement and compact view | 12 October 2026 |
| Naver Smart Store | Shopping search limits | Images of 300 × 300 pixels or less, 4,000 × 4,000 pixels or more, or with a width-to-height ratio beyond 1:2 may not be linked to Naver shopping search | 12 October 2026 |
| Shift4Shop | Main image | The product page image size defaults to 300 × 300 pixels; an assigned image is scaled so its largest side fits, so a 600 × 400 image becomes 300 × 200 | 12 October 2026 |
| Outbrain | Carousel | 3 to 10 cards; card images are JPG or PNG in a 1:1 ratio, minimum 300 pixels and maximum 1,200 pixels, displayed at 300 × 300 pixels | 12 October 2026 |
From a phone photo to 300 × 300 px.
Common 12-megapixel phone photo shapes fitted inside 300 × 300 px: how much each is scaled, the area the photo fills and the padding added on each side (↔ left + right, ↕ top + bottom). The tool above uses the same calculation.
| Phone photo | Scale | Photo area | Padding |
|---|---|---|---|
| 4,032 × 3,024 · 4:3 | 7.4% | 300 × 225 px | ↕ 38 + 37 px |
| 3,024 × 4,032 · 3:4 | 7.4% | 225 × 300 px | ↔ 38 + 37 px |
| 4,032 × 2,268 · 16:9 | 7.4% | 300 × 169 px | ↕ 66 + 65 px |
| 2,268 × 4,032 · 9:16 | 7.4% | 169 × 300 px | ↔ 66 + 65 px |
| 3,024 × 3,024 · 1:1 | 9.9% | 300 × 300 px | — |
300 × 300 px in numbers.
- Aspect ratio
- 1:1
- Megapixels
- 0.09
- Print size at 300 dpi
- 2.5 × 2.5 cm · 1 × 1 in
Other sizes.
300 × 300 px, answered.
Which platforms ask for 300 × 300 px?
Google Ads, Etsy shop banner, Reddit Ads, Naver Smart Store, Shift4Shop, and Outbrain. The table on this page gives each rule in full and links to the platform's guide.
What aspect ratio is 300 × 300 px?
1:1. The image has 0.09 megapixels and prints at 2.5 × 2.5 cm (1 × 1 in) at 300 dpi.
Is the product cropped when resizing for 300 × 300 px?
No. The photo is scaled to fit inside the target size and the remaining space is filled with the padding colour, so the whole product stays in frame.
Your next collection, shot this week.
20 credits at sign-up, no card required. Images made with free credits carry a watermark.