Substack Welcome Page Cover Resizer

Resize a Substack welcome-page cover to at least 600×600 pixels so new readers see a sharp square introduction to the publication.

Sizes, to scale

  • Welcome Page Cover

    600×600

    1:1

  • Wordmark

    1344×256

    21:4

  • Social Preview Image

    1200×630

    1.9:1

+2 more sizes below

Substack welcome cover size

Substack welcome cover size: At least 600×600 px

600

width (px)

600

height (px)

1:1

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.

Prepare Substack Welcome Page Cover

Choose a square cover that communicates the publication topic without depending on fine text. Substack can pair the cover with the publication name and description, so preview the complete welcome-page composition.

How to resize an image for Substack Welcome Page Cover?

  1. 1

    Step 1: Choose a suitable source image

    Start with a square image at least 600 pixels on both sides.

  2. 2

    Step 2: Apply the 600×600 preset

    Upload the image, choose Welcome Page Cover, and use Fit or Fill to control the crop.

  3. 3

    Step 3: Review and upload

    Download the result and preview the welcome page before sharing or publishing it.

FAQ

Substack Welcome Page Cover FAQ

Can't find what you're looking for? Contact support

What size is a Substack welcome-page cover?

Substack says a welcome-page cover image should be at least 600×600 pixels.

Will the 600×600 preset prevent every crop?

Substack can pair the cover with the publication name and description, so preview the complete welcome-page composition. Keep the source file so you can revise the crop if the destination changes its layout or requirements.