Is your ebook cover the right size?
Amazon KDP recommends an ebook cover of 2560 px high and 1600 px wide — a height-to-width ratio of 1.6 : 1 — saved as JPG or TIFF and under 50 MB. Covers that are too small look blurry on high-resolution screens; covers with the wrong ratio get white bars or cropping. This ebook cover size checker tests your cover against every rule and fixes it in one click.
How to check your cover
- Drop your cover image.
- See which checks pass: dimensions, ratio, minimum size, file size and format.
- Preview it at the tiny thumbnail sizes shoppers see on Amazon — and in dark mode.
- Download a fixed 1600 × 2560 px JPG (crop or fit).
KDP ebook cover requirements
| Rule | Value |
|---|---|
| Ideal size | 1600 × 2560 px |
| Ratio | 1 : 1.6 (width : height) |
| Minimum | 625 × 1000 px |
| Format | JPG or TIFF |
| File size | Under 50 MB |
| Colour | RGB |
Design for thumbnails
Most shoppers first see your cover the size of a postage stamp. Use a big, bold title, simple imagery and strong contrast. If you can’t read the title in the smallest preview, make it larger. Light covers need a thin grey border so they don’t disappear on Amazon’s white page.
Making a paperback too? Get the full wrap size from the book cover size calculator. Add the cover to your EPUB with the EPUB metadata editor or the DOCX to EPUB converter.
The ideal Kindle cover size
Amazon recommends 2,560 × 1,600 pixels (height × width), a 1.6 : 1 ratio, in JPG or TIFF. Covers smaller than 1,000 × 625 pixels are rejected, and very low-resolution covers look blurry on high-resolution screens.
What the checker tells you
Upload your cover to see its size and ratio and whether it meets KDP’s minimum and ideal size. Remember that most readers first see your cover as a tiny thumbnail in search results — zoom out on your screen to judge it at that size.
Fix the size in one click
If your cover isn’t 1.6 : 1, choose Crop to fill (fills the frame, may cut a little from the edges) or Fit + border (keeps everything, adds a border), then download a 1,600 × 2,560 JPG ready for KDP.
Thumbnail tips
- Big, bold title text — thin fonts disappear at thumbnail size.
- One strong image rather than many small details.
- Strong contrast between text and background.
- Check how it looks in greyscale for black-and-white e-readers.
Making a paperback too? Get the print cover layout with the cover size calculator.