What are Amazon KDP's ebook cover image requirements?

KDP requires a minimum of 1000px on the shortest side, with a preferred size of 1600×2560px (height-to-width ratio of 1:1.6). Accepted formats are JPEG and TIFF. Most designers deliver covers at 1600×2560px or 2400×3600px for KDP submission.

What width should interior images be for Kindle ebooks?

For reflowable Kindle ebooks, interior images are commonly sized to a maximum of 600px wide to display correctly on standard Kindle devices. Images wider than the device display width are scaled down by the Kindle rendering engine, which can reduce sharpness. Sizing to 600px before embedding gives you control over the output quality.

Can I resize ebook cover images without Photoshop or InDesign?

Yes. Deliteful resizes PNG, JPG, JPEG, and WebP images to any pixel dimension in a browser. Set your target width and height, disable aspect ratio to force exact cover dimensions, and download the resized file — no desktop software required.

Does the tool support the image formats ebook platforms accept?

Yes. KDP and most ebook platforms accept JPEG and PNG for covers and interior images. Deliteful supports JPG, JPEG, and PNG as both input and output formats, with the original format preserved through resizing.

Resize eBook Cover and Interior Images to Publisher Specs Before Upload

Self-publishing platforms reject or degrade ebook cover images that don't meet their dimension and aspect ratio requirements — KDP mandates a minimum of 1000px on the shortest side with a preferred 1:1.6 height-to-width ratio, and uploading a cover at the wrong size results in a blurry or cropped thumbnail on the product page. Deliteful's image resize tool lets ebook creators hit exact publisher pixel targets for both covers and interior images without a desktop publishing workflow.

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Amazon KDP recommends ebook covers at 2560×1600px (1:1.6 ratio) for optimal display across Kindle devices and the web storefront. Draft2Digital and Smashwords have their own cover dimension requirements, and Apple Books enforces a minimum of 1400px on the shortest side. Interior images embedded in reflowable ebooks should be optimized for file size and sized to the display width of the reading device — typically 600px wide for standard Kindle formatting. Managing these specifications across a full book project requires a reliable resize step before any file is packaged.

For ebook covers, aspect ratio control is critical — the 1:1.6 portrait ratio is a publishing standard, and a cover that doesn't conform will display with letterboxing or cropping on retailer pages. Setting exact width and height with aspect ratio disabled lets creators force the precise canvas size their cover design requires. For interior illustrations and diagrams, aspect ratio preservation scales images proportionally to fit the ebook's display width without distortion.

How it works

1
Check your publishing platform's image specs
Note the required cover dimensions and interior image guidelines from KDP, Draft2Digital, Smashwords, or Apple Books documentation.
2
Upload your cover or interior images
Add PNG, JPG, JPEG, or WebP files — your cover art, chapter illustrations, or embedded diagrams.
3
Set dimensions based on publisher requirements
For covers, enter exact width and height (e.g., 1600×2560) and disable aspect ratio to force the required canvas. For interior images, set a target width of 600px with aspect ratio enabled.
4
Download and package into your ebook file
Resized images return in the original format, ready to insert into your EPUB, DOCX, or Kindle file.

Frequently asked questions

What are Amazon KDP's ebook cover image requirements?: KDP requires a minimum of 1000px on the shortest side, with a preferred size of 1600×2560px (height-to-width ratio of 1:1.6). Accepted formats are JPEG and TIFF. Most designers deliver covers at 1600×2560px or 2400×3600px for KDP submission.
What width should interior images be for Kindle ebooks?: For reflowable Kindle ebooks, interior images are commonly sized to a maximum of 600px wide to display correctly on standard Kindle devices. Images wider than the device display width are scaled down by the Kindle rendering engine, which can reduce sharpness. Sizing to 600px before embedding gives you control over the output quality.
Can I resize ebook cover images without Photoshop or InDesign?: Yes. Deliteful resizes PNG, JPG, JPEG, and WebP images to any pixel dimension in a browser. Set your target width and height, disable aspect ratio to force exact cover dimensions, and download the resized file — no desktop software required.
Does the tool support the image formats ebook platforms accept?: Yes. KDP and most ebook platforms accept JPEG and PNG for covers and interior images. Deliteful supports JPG, JPEG, and PNG as both input and output formats, with the original format preserved through resizing.

Create your free Deliteful account with Google and resize your ebook cover and interior images to publisher specs before your next upload.