KDP AI Book Cover: Rules, Sizes and a Free Workflow

A KDP AI book cover is allowed, as long as you follow two sets of rules: Amazon's technical cover specs (sizes, bleed, file type) and its content rules (disclose AI-generated images, don't copy another book's look, make the cover text match your listing). The best workflow is simple: use AI for the artwork, then add the title and author name yourself in a design tool.

This guide covers the exact eBook and paperback cover specs from KDP's help pages, a worked size example, and a free workflow that avoids the most common AI cover mistakes.

Can you use an AI-generated book cover on KDP?

Yes. KDP's content guidelines don't ban AI images. They require you to tell Amazon when content is AI-generated, and they specifically say AI-generated images include cover and interior images and artwork.

The difference KDP draws:

• AI-generated: an AI tool created the image, even if you edited it heavily afterward. Disclose it.
• AI-assisted: you created the artwork and used AI to edit, refine or improve it. No disclosure needed.

You're also responsible for making sure the cover respects intellectual property rights. Never prompt for a famous character, a brand logo, or "in the style of" a living artist's recognizable work. We explain the full policy in our KDP AI disclosure guide.

Kindle eBook cover size and specs

KDP validates eBook covers at upload, and files that don't meet the requirements are rejected.

Two practical tips from the same page:

• If your cover has a white or very light background, add a thin 3–4 pixel medium-gray border so it doesn't disappear on Amazon's white pages.
• Don't stretch a small image to reach 2,560 px. It lowers quality. Upscale properly or regenerate at a larger size.

Paperback cover size: how to calculate it

A paperback cover is different: it's one PDF containing the back cover, spine and front cover, with 0.125" of bleed added to the top, bottom and outside edges.

KDP's formula:

• Cover width = bleed + back cover width + spine width + front cover width + bleed
• Cover height = bleed + trim height + bleed

Spine width depends on page count and paper:

Worked example: 6" x 9", 120 pages, white paper

1. Spine: 120 x 0.002252" = 0.270"
2. Width: 0.125 + 6 + 0.270 + 6 + 0.125 = 12.52"
3. Height: 0.125 + 9 + 0.125 = 9.25"

So your cover PDF is about 12.52" x 9.25". At 300 DPI, that's roughly 3,756 x 2,775 pixels for the full wrap. To skip the math, use KDP's free cover calculator and template generator, which also downloads a guide template showing safe areas and the barcode spot.

Other paperback rules

• Spine text needs at least 79 pages (80 if you use Cover Creator), with at least 0.0625" of space on either side
• Keep front and back text at least 0.125" inside the trim lines
• Place images at 300 DPI minimum, sized at 100% and flattened; KDP recommends CMYK for print images
• If you don't supply a barcode, KDP places one on the back cover, so keep that area clear
• KDP recommends files of 40 MB or less (files over 650 MB won't convert)
• Embed fonts, flatten transparencies, and remove template text before upload

Content rules every AI cover must pass

KDP's eBook cover guidelines and metadata rules add checks that AI images often fail:

• Title and author must be on the cover and match your listing exactly. The title, subtitle, author name and series on the cover should match your metadata.
• No look-alike covers. KDP doesn't allow covers that closely resemble another book's layout, color scheme, fonts or images.
• No pricing or promotions ("only $0.99," "new release," "free").
• No typos, watermarks, or placeholder text. AI tools love to add fake lettering and signatures. Remove them.
• Text must be clear, not blurred, cut off or fading into the background.
• Cover language should match the book's language.
• eBook covers shouldn't include a spine, barcode or back cover.

A free AI book cover workflow that works

Step 1: Study your genre

Search your keywords on Amazon and look at the top covers. Note common colors, image types and font styles. You want to look like you belong in the genre without copying any single cover.

Step 2: Write an art-only prompt

Ask for the image without text. For example:

Watercolor illustration of a small cottage on a cliff above a stormy sea at dusk, warm light in one window, moody blue and gold palette, vertical composition, empty space in the top third, no text, no letters.

Generate many options. Pick the one that reads clearly at thumbnail size, because that's how most shoppers first see it.

Step 3: Fix the image

Zoom in and check for warped shapes, extra fingers, odd faces, and stray fake letters. Clean them in an image editor. Upscale to at least the size you need (2,560 px tall for eBooks, or your full-wrap size at 300 DPI for print).

Step 4: Add text in a design tool

Use Canva or any free design program. Add title, subtitle and author name with fonts that suit your genre, and check contrast. Shrink your design to a small thumbnail and make sure the title is still readable.

KDP's free Cover Creator is another option: many templates let you upload your own image, and it sizes the cover for you. Uploaded images should be at least 300 DPI.

Step 5: Build the paperback wrap

Download KDP's template for your trim size and page count. Place the front art, extend the background across the spine and back, add the back cover blurb, and keep the barcode area empty. Export a single PDF with embedded fonts.

Step 6: Disclose and proof

During setup, mark the cover art as AI-generated if an AI tool made it. Order a printed proof: colors on paper often look darker than on screen.

If you're making a picture book, see our step-by-step guide to making a children's book with AI, which covers interior pages too.

FAQ

What size should a KDP eBook cover be?

KDP recommends 2,560 pixels tall by 1,600 pixels wide, at 300 DPI, saved as JPEG. The minimum is 500 pixels on the longest side, and the maximum is 10,000 pixels per side and 50 MB.

Do I have to disclose an AI book cover on KDP?

Yes, if an AI tool created the image. KDP's AI rules say AI-generated images include cover and interior artwork. If you made the art yourself and only used AI to touch it up, that's AI-assisted and doesn't need disclosure.

Can I put text on my cover with an AI image generator?

You can try, but AI tools often misspell or distort letters, and KDP checks for typos and unclear text. It's safer to generate the art without text and add the title and author in a design tool.

How do I calculate my paperback spine width?

Multiply your page count by your paper's factor: 0.002252" for white paper, 0.0025" for cream, 0.002347" for premium color, or 0.002252" for standard color. KDP's cover calculator does this for you.

Can my book have spine text?

Only if it's long enough. KDP's cover guide requires at least 79 pages for spine text, or 80 pages if you use Cover Creator. Thinner books should leave the spine blank.

Conclusion

AI can give you striking cover art for almost nothing, but KDP judges the whole cover: size, bleed, readable text that matches your listing, originality and honest disclosure. Generate the art, add text yourself, use KDP's calculator, and proof before you publish.

For more practical AI publishing tutorials, subscribe to AI Money Pilot on YouTube.

Sources

• KDP Help: Cover Image Guidelines for Kindle eBooks
• KDP Help: Create a Paperback Cover
• KDP: Print Cover Calculator and Templates
• KDP Help: Cover Creator
• KDP Help: Metadata Guidelines for Books
• KDP Help: Content Guidelines (AI content)