I built BookKraft AI — 12 formatting tools for indie authors who self-publish on KDP

Hey IH,

I've been building Book Kraft AI (bookkraftai.com) for the past few months. It's a web-based toolkit for indie authors who self-publish on KDP, Ingram Spark, and other platforms.

The problem I kept seeing: authors spend hours fixing formatting errors that could be caught automatically. Kindle rejections, broken EPUBs, missing metadata, inconsistent style — all fixable with the right tools.

So I built 12 of them, and just redesigned the homepage to make them easier to find.

What it does:

·         EPUB Validator - catches errors before you upload to KDP, no signup required

·         Kindle Format Fixer - fixes smart quotes, invisible doubles, and encoding issues from Word/Google Docs

·         EPUB Formatter - generates a valid EPUB 3.0 file from your manuscript, handles chapters, metadata, and cover image

·         TOC Generator - builds a clickable, correctly formatted table of contents for Kindle, EPUB3, and MOBI

·         Manuscript Cleanup - AI-powered editing pass that catches continuity errors and repeated words

·         Print-to-Digital Adapter - converts print-formatted manuscripts into ebook-ready format

·         Front Matter & Back Matter Generators - dedication, disclaimer, and back matter pages from a simple form

·         Style Sheet Auditor - AI finds name and capitalization inconsistencies across a manuscript

·         CSS Snippet Generator - copy-paste CSS for drop caps, small caps, blockquotes, and more

·         Metadata Builder - formats metadata for KDP, IngramSpark, and EPUB OPF

·         KDP Keyword & Category Finder - AI-generated long-tail keywords and category paths for discoverability

·         Cover Dimension Checker - makes sure your cover meets store specs before upload

Pricing:
Five tools are completely free, no signup needed. The rest are one-time purchase — no subscription, credits never expire.

What it does:

·         EPUB Validator (free) - catches errors before you upload to KDP

·         Word Manuscript Cleanup Checker (free) - scans for double spaces, straight quotes, stray formatting tags in Word docs

·         Cover Checker (free) - checks pixel dimensions and file format against KDP and Apple Books requirements

·         Metadata Builder (free) - one form, ready-to-paste metadata for every store

·         Full Manuscript Mode (free) - detects chapters, fixes smart quotes, builds a valid EPUB 3.0 from your docx or txt

·         Kindle Format Fixer - fixes encoding issues from Word/Google Docs

·         TOC Generator - clickable table of contents for Kindle and EPUB3

·         Style Sheet Auditor - AI finds name/capitalization inconsistencies

·         KDP Keyword & Category Finder - AI-generated long-tail keywords and category paths

·         Front Matter, Back Matter, CSS Snippets, and more

Stack:
Next.js, Supabase, Cloudflare Workers, Paddle for payments.

Where I'm at:
Just wrapped a full homepage redesign and SEO cleanup, and I'm building out distribution now. Would love feedback from anyone who knows the self-publishing space or has thoughts on the positioning.

bookkraftai.com