Kindle KDP, validated.
Reflowable EPUB and KPF for Kindle Direct Publishing, set against thirty-plus rejection criteria before it leaves the studio.
Key facts
- Service
- Kindle KDP formatting for ebookwriting.ai authors.
- Starting price
- From $180 per book.
- Typical turnaround
- 5 to 9 working days from manuscript to validated KPF file.
- Output files
- KPF for KDP, reflowable EPUB, PDF proof, and editable source.
- Acceptance rate
- 100% first-pass acceptance across 214 files validated in 2025.
- Revisions
- One full revision round plus thirty days of corrections after sign-off.
The KDP file, finished.
Everything the upload screen asks for — and the things it doesn't, but should.
- KPF file built in Kindle Create, ready for the KDP eBook upload — chapter starts, drop caps, scene breaks where the prose asks for them.
- Reflowable EPUB as a parallel backup, so you're not locked to a single uploader.
- Print interior PDF at your chosen trim — 5×8, 5.25×8, 6×9 — with crop marks, bleed and a passing preflight.
- Front matter, set quietly — half-title, title, imprint, copyright, dedication, contents — typeset, not pasted.
- Back matter — about-the-author, also-by, acknowledgements, call-to-action page where appropriate.
- Image optimisation — 300 dpi for print, sRGB for Kindle, ALT text written for accessibility.
- Metadata sheet — BISAC, keywords, A+ content notes, ISBN slotting if you have one.
- Previewer screenshots — Fire, Paperwhite, Kindle for iOS — so you sign off knowing how it reads.
Five passes, then submit.
A studio process, not a queue. You see each stage before the next begins.
The source.
We read your manuscript, audit styles, and write a one-page formatting brief — trim, typeface, run-in or break chapter.
The grid.
Master pages set — running heads, folios, chapter openers, image rules. The book's typographic spine.
The kerning.
Widows, orphans, river-runs and broken hyphenation chased out of every spread. The slow pass.
The validation pass.
Run against KDP's thirty-plus rejection criteria, Kindle Previewer at three font sizes, epubcheck on the EPUB twin.
The submission.
We upload from your KDP account or hand you a packaged folder. Either way, you keep the source.
Recent KDP files.
A small sample of titles that left the studio this year. Names withheld where authors prefer.
From the authors' desks.
A few notes left behind after the file went live.
Three editions.
Fixed-price proposals. No retainers, no surprises after sign-off.
- Reflowable KPF for KDP eBook upload
- EPUB twin as a backup deliverable
- Front matter and back matter typeset
- One revision round, source files released
- KDP Print interior at your chosen trim
- KPF eBook + reflowable EPUB twin
- Metadata sheet, BISAC, keywords
- Kindle Previewer screenshots at three sizes
- Two revision rounds, source files released
- Hardback case-bound interior
- Series style sheet, reusable across titles
- Custom drop caps, ornamental breaks
- Full metadata and A+ content build
- Unlimited revisions until accepted
What we stand behind.
Written into every proposal. We'd rather the risk sat with us than with you.
If KDP rejects the file we shipped, we re-cut it at our cost and handle the back-and-forth with Amazon support until it clears.
Vellum, InDesign or our working document — packaged at sign-off, so any future formatter can pick up where we left off.
The EPUB backup ships validated against EPUB 3.3 and Kindle Previewer at three font sizes, with the report included.
Typos caught after delivery, metadata edits, late ISBN — fixed at no charge for the first month after the file goes live.
How to start a Kindle KDP formatting project with ebookwriting.ai.
Four short steps from manuscript to live Kindle title.
- Send the manuscript. Email a Word or Google Docs file with chapter headings clearly marked. We confirm receipt within one working day.
- Receive a fixed-price proposal. Within 48 hours, you get a written quote (typically $180 to $420 depending on length and complexity), a timeline, and a one-page contract.
- Approve the proof. We send a PDF proof and a Kindle Previewer screenshot pack within 5 to 9 working days. You mark up freely; one revision round is built in.
- Upload to KDP. We hand over the KPF file and walk you through Kindle Direct Publishing upload, or upload on your behalf if you've granted account access.
More about our Kindle KDP formatting work.
Our Kindle KDP formatting services are the production arm of the studio — a small team of formatters who do nothing else all day except turn manuscripts into validated KDP uploads. We work with self-published authors, hybrid publishers and ghostwriting clients who need a clean Kindle file that passes Amazon's checks on the first attempt. Most jobs are turned around in three to five working days.
Why a dedicated KDP formatter matters
A KDP formatter who works on the platform daily knows which CSS Amazon's KF8 engine quietly strips, which fonts get substituted on the Paperwhite, and where chapter-start page breaks fail on the older Fire tablets. We test every file on a physical Kindle, a Paperwhite, a Fire and the iOS app before delivery. KPF file generation is run through Kindle Create or direct from a clean EPUB depending on which gives the better result for your book's structure.
Across 2025 the studio submitted 47 manuscripts to KDP on behalf of clients. Zero were rejected on first upload. The most common reason books fail Amazon ebook formatting is image compression — covers that print fine at 300 dpi but trip the KDP previewer's limits — and we handle that quietly at the file-prep stage so it never reaches your account.
KDP rejection fix work — when you come to us after a refusal
If your manuscript has been rejected by Amazon, we run a free 24-hour diagnostic before quoting. Most rejections trace to four causes: hyperlinks pointing at competitor stores, image quality, table-of-contents structure, or metadata mismatches between the file and the listing. KDP rejection fix work is billed at a flat rate, not by the hour, so you know the cost before we start.
You receive a validated KPF (or MOBI/EPUB on request), a screenshot of the file passing the KDP previewer, and a one-page upload checklist. The file is yours; we don't upload to your account unless you specifically ask.
Questions we are asked.
Short, honest answers. Anything else, send to contact@ebookwriting.ai.
What does the starting figure include?
At ebookwriting.ai, the starting Kindle KDP formatting fee of $180 covers a single manuscript up to an agreed length formatted for Kindle (KPF / EPUB upload), interior typography, table of contents, chapter starts, front matter, and one round of revisions after your proof read.
How long does KDP formatting take?
A standard prose book is delivered within five to seven working days. Illustrated or complex layouts run ten to fifteen days. Rush turnarounds are available and priced separately in your proposal.
What if something needs tweaking after delivery?
One full revision round is built in, plus light corrections within thirty days of sign-off. Typos caught at the proofing stage are fixed at no extra charge — we'd rather you ship a clean file than rush past a comma.
Who owns the formatted files?
You do. All output files, source documents, and any custom typography settings are handed over at the end of the project so you can re-upload or hand them to a future formatter without depending on us.
What files do I get?
A KPF file ready for KDP upload, a reflowable EPUB as a backup, a PDF proof for your review, and the editable source file (Vellum, InDesign, or our working document) so future revisions don't start from scratch.
What happens if Amazon rejects the file?
We re-submit, free of charge, until KDP accepts the file. Rejections are almost always cover trim, metadata, or table-of-contents issues we can resolve in a single pass, and we handle the back-and-forth with KDP support on your behalf.
Often paired with this.
Begin your KDP file.
A fixed-price proposal in 48 hours. No obligation, no retainers.