Free Substack Publication Banner Image Resizer (1200 x 300) | ResizeHub
Professional tool to resize, crop, pad, and scale images to the exact dimensions of Substack publication banner (1200x300 pixels) automatically.
Open Workspace with Substack Publication Banner Resizer SettingsPrerequisites & Dimensions for Substack Publication Banner Resizer
The verified specifications for Substack Publication Banner Resizer require exactly 1200 x 300 pixels with a matching aspect ratio of 4:1. The platform's recommended format is PNG, with a maximum payload threshold of 5MB.
How to Crop and Fit for Substack Online
Using our advanced browser engine, you can fit, crop, or pad your graphic files to the exact dimensions of Substack Publication Banner Resizer. Simply upload your asset, choose your scaling boundaries, and export to PNG in seconds.
Frequently Asked Questions
What are the dimensions for a Substack Publication Banner?
The perfect specifications are 1200 pixels in width by 300 pixels in height, featuring an aspect ratio of 4:1.
Does using this Substack tool reduce image clarity?
No, ResizeHub runs completely in your browser memory using advanced bilinear/bicubic sampling. There is absolutely zero cloud file compression or detail loss.