Bleed edge
Extend backgrounds to the red edge so there is no white border after trimming.
KDP cover creator guide
Book Cover Creator Manual
A practical handbook for authors who need to create an ebook cover, turn a front cover into a paperback wrap, or fix the KDP cover errors that block upload.
Start here
Choose the job you came to finish
The manual is organized by user intent, not by feature names. Each section tells you what to prepare, which editor area to use, and what to check before exporting.
Before you edit
Understand the canvas guide lines
Most rejected covers come from the same visual mistakes: important text is too close to the cut line, the background does not fill bleed, or the barcode space is covered.
Trim line
This is where the printed cover is cut. Keep important content away from this line.
Safe area
Titles, author names, logos, and faces should stay inside the green guide.
Barcode area
Leave this back-cover area clear so KDP can place and scan the barcode.
Create an ebook cover
Best for Kindle-only publishing or when you need a clean front cover before building a print wrap.
- Prepare the title, author name, genre, and core mood.
- Use AI generation, an image library, or upload your own art.
- Check thumbnail readability before exporting.
Turn an ebook cover into paperback
Convert a front-only ebook cover into a full KDP wrap with back cover, spine, bleed, and barcode space.
- Upload the front cover image.
- Choose trim size, page count, and paper type.
- Let the editor calculate the spine and full-wrap size.
Use AI Book Cover Generator
Generate a concept by genre, audience, tone, and visual style, then send it into the editor for KDP print setup.
- Use a reference cover when you want a similar style.
- Regenerate if the typography is weak or too busy.
- Finalize safe zones inside KDP Cover Creator.
Build a useful back cover
The back cover can stay simple or carry stronger sales copy. The safest layouts reserve barcode space first.
- Solid color: simplest and cleanest.
- Picture plus text: richer, but needs safe-zone control.
- Color sync: match front, spine, and back cover.
Fix spine size mismatch
Spine errors usually come from a page count, paper type, or trim size mismatch between the cover and the KDP setup.
- Recheck trim size, page count, and paper type.
- Update the spine width before export.
- Keep spine text centered inside the spine safe area.
Fix text outside the safe zone
If text crosses the green guide, KDP may trim it or make the cover look misaligned after printing.
- Use Fit in Safe Zone for uploaded cover images.
- Move title, subtitle, and author text inward.
- Reduce spine font size if the spine is narrow.
Fix low-resolution images
A cover can be the correct size but still fail quality checks if the placed image is below 300 DPI at final print size.
- Run precheck before export.
- Avoid over-zooming small source images.
- Replace low-resolution artwork when one-click repair is not enough.
Check before export
The final pass should be visual and technical: look at the canvas lines, then confirm the output file.
- Background reaches the red bleed edge.
- Important content stays inside the green safe area.
- Barcode space is clear on the back cover.
Troubleshooting
Fast diagnosis table
This table is built for search snippets and support use. Each row maps the visible problem to the likely cause and the next action.
| Problem | Likely cause | What to do | Manual section |
|---|---|---|---|
| KDP says the cover is the wrong size | Trim size, page count, paper type, or spine width changed. | Rebuild the wrap using the current KDP settings. | Fix spine size |
| Text is too close to the edge | Title, author, logo, or embedded text crosses the safe area. | Move text inside the green line or use Fit in Safe Zone. | Fix safe-zone text |
| White border appears after preview | The background does not extend through the bleed area. | Extend the image or background to the red dashed line. | Canvas guide lines |
| Image quality warning | The placed image is below 300 DPI at final print size. | Replace the source image or reduce zoom. | Fix low-resolution images |
FAQ
Common questions
Keep answers short, direct, and easy for new users to act on inside the editor.
Can I upload only a front cover for paperback?
No. Paperback and hardcover covers need a full wrap: back cover, spine, front cover, and bleed. A front cover is only the starting point.
Which line should text stay inside?
Keep important text inside the green safe area. Text near the black trim line may be cut or look too close to the edge.
When should I hide spine text?
Hide spine text when the book is too thin or the text cannot fit safely inside the spine guide after reducing font size.
What image quality should I use?
Aim for about 300 DPI at the final print size. If the image is too small, replacing the source artwork is safer than over-sharpening.
Related resources
Read next
These cards make the manual work as a content hub while sending users to deeper guides only when they need them.
KDP Cover Requirements
Learn the official size, bleed, safe-zone, barcode, and export rules before uploading.
Read requirementsBook Cover Error Fix
Diagnose size, bleed, spine, and export errors from a rejected KDP cover file.
Fix cover errorsSpine Width Guide
Understand how page count and paper type change the spine width of a paperback.
Check spine widthReady to create or repair your cover?
Open KDP Cover Creator, choose your task, then use the canvas guide lines as your final checklist before export.