Substack Header Image Resizer1100 × 220 px
Resize any image to exactly 1100×220px for Substack. Free, instant, and nothing leaves your browser.
- Dimensions
- 1100 × 220 px
- Aspect ratio
- 5:1
- Max file size
- No fixed limit
- Best format
- PNG
How to resize an image for Substack
Add your image
Click Choose image or drop a file into the box above. JPG, PNG and WebP all work.
Check the crop
The preset is already set to 1100×220px. Drag inside the preview if you want to reposition the crop.
Download
Pick a format and click Download. You get a Substack Header Image at exactly 1100×220px.
Substack Header Image size at a glance
Substack headers at 1100×220 are narrow banners displayed at the top of your publication page. The 5:1 ratio limits visual complexity — treat it as a branding bar.
Why 1100×220 matters
The header sets your newsletter's visual identity. A clean, on-brand header distinguishes your publication from the thousands of default Substacks.
What happens when the size is wrong
Complex images become an unreadable smear at 220px tall. Detailed text is too small to read in this narrow format.
Best practices
- Keep it simple — publication name, optional tagline, brand colors.
- Use large, bold text if including any text at all.
- Test how it looks in email as well as on the web.
Frequently asked questions
What size should a Substack Header Image be?
The recommended size for a Substack Header Image is 1100×220 pixels (5:1 aspect ratio).
How do I resize an image for Substack Header Image?
Upload your image to the resizer above. It will automatically crop and resize to 1100×220px. Adjust the crop position if needed, then download the result. Your image never leaves your device.
Which format should I use for a Substack Header Image?
Substack accepts JPG, PNG. We recommend PNG — Wide banner displayed at the top of the publication page and in some email layouts. Very narrow format.
Is my image uploaded anywhere?
No. TinyResize runs entirely in your browser. The file is read from your device, resized on your device, and downloaded from your device. Nothing is sent to a server.