What comes out, and the checks that run before it does
Real files from a sample book written by hand for this site. No model was asked for any of them: the typesetting, the checks and the pictures are PenWriter’s own code.
Some of the files
A cover mockup
The cover as a standing book. The title, subtitle and name are set by PenWriter's typesetter, never drawn by a picture model.
A paperback page
A chapter opening laid out at a KDP trim size, with the inside margin your page count needs and running heads.
The wrap-around cover
Back, spine and front in one PDF, sized for the page count. The back carries the description from the listing.
A quote card
A sentence taken word for word from a chapter, drawn from the book's cover and colours. PenWriter makes the file; it posts nothing.
Also made, and not shown here: the Kindle EPUB (run through a validator) and a Word file. Together they are what you upload to KDP yourself.
Check a listing against Amazon’s rules
A few of the 713 rules in PenWriter’s rulebook, running live on a sample listing. Change anything, or break it on purpose. The limits were read from Amazon’s pages on 15 October 2026, and the rule behind each row is a link away.
Nothing blocked
This listing passes
A copy earns about (70% option)
$3.41
Title and subtitle togetherPasses
37 of 200 characters.
The Amazon page this rule came from (Title and subtitle together; opens in a new tab)A title readers do not skim pastPasses
The title is 30 characters.
The Amazon page this rule came from (A title readers do not skim past; opens in a new tab)Description lengthPasses
375 of 4,000 characters, tags counted as KDP counts them.
The Amazon page this rule came from (Description length; opens in a new tab)Only markup KDP showsPasses
No headings KDP leaves out.
The Amazon page this rule came from (Only markup KDP shows; opens in a new tab)The 70% royalty optionPasses
$4.99 is inside the $2.99 to $12.99 band, so the 70% option is open. About $3.41 a copy after delivery cost.
The Amazon page this rule came from (The 70% royalty option; opens in a new tab)Delivery costPasses
$0.15 a megabyte on the 70% option, so a 0.8 MB file costs $0.12 a copy.
The Amazon page this rule came from (Delivery cost; opens in a new tab)
Passing means a listing meets what Amazon has published. Amazon decides after you upload, and can find a problem no published rule mentions. Amazon changes its rules; the page is the authority, not this one.