A strong, correctly-sized cover is the single biggest driver of clicks — and stores reject covers that are too small. Here is what Chiify needs.
The specs
- Format: JPG or PNG.
- Resolution: at least 1400 pixels on the shortest side. The ideal is 1600 x 2560 (a 1:1.6 portrait ratio).
- Orientation: portrait, taller than it is wide.
- Colour: RGB.
- Text: make sure the title and author are legible even as a small thumbnail.
Why the size rule exists
Apple Books and several other stores reject covers under ~1400px, and a soft, pixelated cover hurts conversions everywhere. Chiify blocks undersized covers at upload so your book never silently fails at a retailer.
Common cover problems
- "Image is too small" — re-export at a higher resolution; do not upscale a tiny image, it will look blurry.
- "Embedded cover not found" — this is about the cover inside your EPUB; re-upload and let Chiify handle cover injection. See cover upload errors.
Don't have a designer?
A clean, readable cover that fits your genre beats a busy one. Look at the top sellers in your category and match the visual conventions readers already expect.
Still need help? Open a ticket from your dashboard or email [email protected] — a real person replies.