Substack Wordmark Resizer
Prepare a horizontal Substack publication wordmark at the documented minimum size of 1344×256 pixels.
Substack wordmark size
Substack wordmark size: At least 1344×256 px, horizontal
1344
width (px)
256
height (px)
21:4
aspect ratio
Need other dimensions? Browse all Substack sizes or use the free image resizer for any platform.
Sources
We check platform-specific dimensions against source documentation when available.
- Substack Support — Set a custom theme - Substack says publication wordmarks should be horizontal images at least 1344×256.
Prepare Substack Wordmark
Keep the publication name readable inside a shallow horizontal canvas and use transparent padding instead of a baked-in background. The website editor can scale the wordmark across layouts, so check both wide and narrow screens.
How to resize an image for Substack Wordmark?
- 1
Step 1: Choose a suitable source image
Choose a high-resolution horizontal logo, ideally with a transparent background.
- 2
Step 2: Apply the 1344×256 preset
Upload the image, choose Wordmark, and use Fit or Fill to control the crop.
- 3
Step 3: Review and upload
Download the PNG, upload it in the website editor, and inspect the header at desktop and mobile widths.
Substack says publication wordmarks should be horizontal images at least 1344×256 pixels.
All Substack Image Sizes
Choose another available Substack canvas and review its source notes
Creator and Community Image Sizes
Prepare artwork for creator pages, newsletters, music releases, streaming channels, support pages, and chat communities using source-backed presets.
Substack
File tools
Convert the resized image
Need a different file format or transparent background? Choose a focused converter, then check the preview and encoded size before downloading.
Put Your Substack Wordmark Image Into a PDF
Put one image on each page, arrange the order, and create the PDF in your browser.
Free tools
Explore Free Creative Tools
Everything you need to make your photos stand out with our free photo editing tools
AI Photo Editor
Edit photos by describing what you want. Remove backgrounds, resize, enhance, add text, and more. Just type your edit in plain English.
Face Swap
Create an AI face-swap image from uploaded photos. Results vary with lighting, pose, source quality, and the faces in each image.
Photo Inverter
Invert image colors online for free. Create a negative photo, adjust intensity, or target selected colors privately in your browser with no signup.
Image Size Converter
Free online image size converter. Resize a photo to exact pixel dimensions (width x height) in JPG, PNG, or WebP. Need a target file size in KB or a format change? We point you to the right tool. No signup.