---
title: "Resize image to 300 × 300 px — free, no cropping | Herofab"
description: "Resize photos to exactly 300 × 300 pixels in your browser. The whole product stays in frame, padded and never cropped. Free; nothing is uploaded."
url: https://herofab.app/tools/resize-image-to-300x300
language: en
updated: 2026-11-06
---

# 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.

![Blush satin slip dress on a white background · Resize image to 300 × 300 px](https://herofab.app/img/ex/slip-dress-white-1100.webp)

Made with Herofab · Packshot studio

## Choose the size.

Sizes come from each marketplace's own help pages, summarised in the [guides](https://herofab.app/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](https://herofab.app/guides/google-ads-image-size) | 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](https://herofab.app/guides/etsy-shop-banner-size) | 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](https://herofab.app/guides/reddit-ad-image-size) | 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](https://herofab.app/guides/naver-smart-store-image-size) | 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](https://herofab.app/guides/shift4shop-product-image-size) | 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](https://herofab.app/guides/outbrain-ad-image-size) | 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 |

[Naver Smart Store image resizer](https://herofab.app/tools/naver-smart-store-image-resizer)

## 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.

[100 × 100 px](https://herofab.app/tools/resize-image-to-100x100) · [150 × 150 px](https://herofab.app/tools/resize-image-to-150x150) · [400 × 400 px](https://herofab.app/tools/resize-image-to-400x400) · [500 × 500 px](https://herofab.app/tools/resize-image-to-500x500) · [600 × 600 px](https://herofab.app/tools/resize-image-to-600x600) · [640 × 640 px](https://herofab.app/tools/resize-image-to-640x640) · [800 × 800 px](https://herofab.app/tools/resize-image-to-800x800) · [1,000 × 1,000 px](https://herofab.app/tools/resize-image-to-1000x1000) · [1,024 × 1,024 px](https://herofab.app/tools/resize-image-to-1024x1024) · [1,080 × 1,080 px](https://herofab.app/tools/resize-image-to-1080x1080) · [1,200 × 1,200 px](https://herofab.app/tools/resize-image-to-1200x1200) · [1,500 × 1,500 px](https://herofab.app/tools/resize-image-to-1500x1500) · [1,600 × 1,600 px](https://herofab.app/tools/resize-image-to-1600x1600) · [2,000 × 2,000 px](https://herofab.app/tools/resize-image-to-2000x2000) · [2,048 × 2,048 px](https://herofab.app/tools/resize-image-to-2048x2048) · [2,200 × 2,200 px](https://herofab.app/tools/resize-image-to-2200x2200) · [2,560 × 2,560 px](https://herofab.app/tools/resize-image-to-2560x2560) · [1,200 × 628 px](https://herofab.app/tools/resize-image-to-1200x628) · [1,920 × 1,080 px](https://herofab.app/tools/resize-image-to-1920x1080) · [1,080 × 1,920 px](https://herofab.app/tools/resize-image-to-1080x1920) · [720 × 1,280 px](https://herofab.app/tools/resize-image-to-720x1280) · [762 × 1,100 px](https://herofab.app/tools/resize-image-to-762x1100) · [750 × 1,000 px](https://herofab.app/tools/resize-image-to-750x1000) · [Marketplace image resizer](https://herofab.app/tools/marketplace-image-resizer)

## 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.