Book metadata checker
Paste your title, subtitle, series name, description and keywords, and check them against each store's limits and rules before you upload: lengths, and the words stores reject, like "bestselling", prices, links and program names. Nothing is saved.
From each store's own help pages, checked 4 October 2026. Only KDP and IngramSpark publish length limits; where a store doesn't, the checker says so rather than guessing.
Store by store
Barnes & Noble Press, Draft2Digital and Lulu don't publish metadata limits. For the description itself, try the blurb checker and the description formatter.
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Your cover, blurb and store links, a first chapter readers can try, and numbers on where they stop. Host your advance copies free too.