ImageMagic — KDP-Ready Book Cover Resizer
Resize and prepare any book cover to Amazon KDP-ready dimensions and DPI in seconds. A free supporting tool from PublishJockey — no designer, no desktop software.
Covers that pass KDP the first time
A great cover is useless if Amazon rejects it for being too small or low-resolution. Print covers usually need 300 DPI at the exact trim size of your book — and getting those numbers right by hand in image software is fiddly and easy to get wrong.
ImageMagic handles it for you. Upload your cover, choose your KDP book size, and it resizes the image to the correct print-ready dimensions and DPI. It is especially handy for AI-generated covers, which often come out square or low-resolution — ImageMagic upscales and reframes them into a clean, upload-ready file.
Exact KDP dimensions
Resize any cover to the precise pixel dimensions Amazon KDP expects for your chosen trim size.
Print-quality DPI
Output covers at the print-ready resolution KDP requires, so uploads pass on the first try.
Great with AI covers
Upscale and reframe AI-generated artwork into a polished, correctly sized book cover.
Part of your book workflow
Pair a KDP-ready cover with a publisher-grade interior formatted and exported in PublishJockey.
Who ImageMagic is for
• Self-publishing authors preparing a cover for Amazon KDP print books.
• Authors using AI cover tools who need to upscale and resize artwork to print spec.
• Indie publishers who want covers that pass KDP validation without hiring a designer.
• Anyone formatting a book in PublishJockey who wants a matching, print-ready cover.
Frequently asked questions
What does ImageMagic do?
ImageMagic resizes and prepares a book cover image to KDP-ready dimensions and DPI, so your cover meets Amazon Kindle Direct Publishing print requirements without a designer or desktop software.
Which book sizes does ImageMagic support?
ImageMagic supports the common KDP trim sizes and calculates the correct pixel dimensions at print-quality DPI for the size you choose, so your cover is ready to upload.
Why does cover DPI and size matter for KDP?
Amazon KDP rejects covers that are too small or low-resolution. Print covers typically need 300 DPI at the exact trim size. ImageMagic does that math and resizing for you so your upload passes the first time.
Is ImageMagic free?
Yes. ImageMagic is a free supporting tool for PublishJockey users. Sign up for a free account to start preparing covers; no credit card is required to try it.
Can I use an AI-generated cover with ImageMagic?
Absolutely. AI image tools often output a square or low-resolution file. ImageMagic upscales and reframes it to the exact KDP dimensions and DPI your book needs.
What image formats can I upload?
ImageMagic accepts standard cover image files (such as JPG and PNG) and returns a print-ready image sized for your chosen book format.
What happens to my image after processing?
Your image is processed securely and is not shared. PublishJockey is privacy-focused — your cover stays yours.
Ready to prepare your cover?
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