Is Your Manuscript Ready for Amazon KDP?
Upload your .docx and get an instant report on the things that most often break a KDP upload or produce an amateur-looking interior: missing chapter headings, manual indents, stacked blank lines, Letter-size pages, a too-short page count. Free, no sign-up, nothing stored.
Drop your .docx here or click to choose
Free instant check · nothing is stored · up to 15MB
Fix everything automatically
Every issue the checker flags is handled for you: AI finds your chapters, cleans up the structure, and typesets a KDP-ready 6×9 print PDF plus an accessibility-ready EPUB.
Drop your .docx here or click to choose
Word manuscripts up to 15MB · your file is deleted after processing
Upload first → see your typeset pages → pay $19 → the files download themselves. Nothing to copy or paste.
Don't have your manuscript handy? — no upload, no signup.
Frequently asked questions
What exactly does the checker look at?
Nine automated formatting checks: a valid .docx, enough content for KDP's 24-page paperback minimum, Word heading styles on chapters, plain ALL-CAPS pseudo-titles, manual tab/space indents, stacked blank paragraphs, page size (book trim vs Letter/A4), Word-generated tables of contents, and image alt text.
Is my manuscript uploaded or stored anywhere?
The file is inspected in memory to produce your report and is not saved. The checker doesn't use AI either — it's a pure structural analysis.
My manuscript failed some checks — now what?
That's normal; most drafts do. Every issue the checker flags is something PaperbackKit fixes automatically when it formats your book: it detects chapters, rebuilds structure, and typesets a KDP-ready 6×9 print PDF plus EPUB in about 5 minutes.
If everything passes, is my book guaranteed to be accepted by KDP?
No — these are automated formatting checks, not a legal or contractual guarantee. Amazon reviews content, covers and metadata separately. Passing means the interior-formatting problems that most commonly cause trouble aren't present.