S Social Image Resizer

Local browser tool

Resize Images for Social Media

Upload one image. Pick a platform size. Download a ready-to-post PNG.

  1. 1Upload
  2. 2Choose size
  3. 3Download

Preview

Instagram Square Post

1080 x 1080 · ratio 1:1

Current size: 1080 x 1080
Upload one image and export it for every social platform. Your image is processed locally in your browser.
Upload an image to compare the source ratio with the selected output ratio.

Reference

Social Media Image Sizes

Common export sizes for creators, sellers, operators, and brand teams.

Platform Use Size

Workflow

What the tool actually does

Social Image Resizer is built for one practical job: take one source image and create a platform-sized PNG without sending that image to a server.

Local image handling

The selected JPG, PNG, or WEBP file is loaded into the browser and drawn on a Canvas preview. The file is not uploaded by this tool, and refreshing the page clears the working image.

Crop choices before export

Crop to Fill is for full-bleed covers, Fit with Background is for preserving product edges or screenshots, and Blur Background is for mismatched ratios that still need a finished-looking frame.

Platform-specific previews

The preset list covers common creator and seller tasks such as Instagram feed posts, YouTube thumbnails, TikTok covers, Etsy listing photos, Shopify product images, Pinterest pins, and 小红书 covers.

Quality checks that matter

Before downloading, compare the source ratio with the target ratio, turn on the safe area when text or faces are near the edge, and check whether the final preview still communicates at phone size.

Help

FAQ

Are images uploaded to your server?

No. The tool uses your browser and Canvas to process images locally on your device.

What image formats are supported?

JPG, PNG, and WEBP are supported in this MVP.

What is the best size for Instagram posts?

Use 1080 x 1080 for square posts, 1080 x 1350 for portrait posts, and 1080 x 1920 for Story or Reel covers.

What is the best size for YouTube thumbnails?

YouTube thumbnails work best at 1280 x 720, a 16:9 landscape ratio.

Can I resize images for Etsy and Shopify?

Yes. This tool includes 2000 x 2000 Etsy listing images and 2048 x 2048 Shopify product images.

Can I batch resize images?

Not in this first version. Batch upload and ZIP export are good next-stage Pro features.

Why does my image get cropped on Instagram or 小红书?

Platforms crop images when your source ratio does not match the post or cover ratio. Use Fit or Blur mode when important edges must stay visible.

Is this tool free?

Yes. The MVP is a free single-image, single-download tool.

Privacy Policy

Your images stay on your device. We do not upload, store, or save user images. Refreshing the page clears the current image.

Read full Privacy Policy

Terms

This free tool is provided for basic image resizing. You are responsible for the rights and usage of the images you process.

Read full Terms