Free Tool

Substack Photo Resizer

Resize publication logos and cover images for Substack.

Interactive workspace

Upload an image

JPG, PNG, or WebP (Max 10MB)

Why use this tool?

Clean visuals help newsletters stand out in inboxes. This tool ensures your images are perfectly sized to avoid automatic cropping or quality loss.

About Substack Image Sizes

Clean visuals help newsletters stand out in inboxes.

How to Use This Tool

  1. Upload your image - Drag and drop or click to select
  2. Select the format - Choose from 2 presets (Profile, Cover, Post, etc.)
  3. Adjust the crop - Zoom, rotate, and position your image
  4. Download - Get your perfectly sized image instantly

Standard Substack Dimensions

Publication Logo
256 x 256 px
Square logo.
Cover Image
600 x 600 px
Social preview image.

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Enhance your Substack visuals with Rybbit

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