# kdp123 > Verified tools, official rules and open data for Amazon KDP publishers. Every listing shows what it costs, what it does for KDP, and when we last checked. kdp123 is an independent directory. Every entry lists price, KDP-specific attributes, sources and a last-checked date. Data is CC BY 4.0: attribute "kdp123.com" with a link. Amazon KDP help pages are the authority on KDP rules. ## Data - [tools.json](https://kdp123.com/tools.json): all listings as JSON - [tools.csv](https://kdp123.com/tools.csv): all listings as CSV - [llms-full.txt](https://kdp123.com/llms-full.txt): one line of facts per listing - [Methodology](https://kdp123.com/methodology/) ## Stages - [Research](https://kdp123.com/stages/research/): Pick a niche, keywords and categories before you make anything. - [Create](https://kdp123.com/stages/create/): Write, design and format the interior and the cover. - [Publish](https://kdp123.com/stages/publish/): KDP itself, print and distribution, ISBNs, copyright and trademarks. - [Market](https://kdp123.com/stages/market/): Ads, promotions, reviews and email. - [Track](https://kdp123.com/stages/track/): Sales, rank and royalty tracking after launch. - [Learn](https://kdp123.com/stages/learn/): Courses, blogs, channels and communities worth your time. ## Categories - [Book & Niche Research](https://kdp123.com/c/book-research/) (17): Tools that estimate demand, competition and sales for books on Amazon. - [Keywords & Categories](https://kdp123.com/c/keywords-categories/) (13): Find the search terms and Amazon categories a book should target. - [Low-content & Puzzle Books](https://kdp123.com/c/low-content/) (15): Journals, planners, puzzle, activity and coloring book makers. - [Cover Design & Mockups](https://kdp123.com/c/cover-design/) (25): Cover makers, templates and 3D mockups for KDP. - [Writing & Formatting](https://kdp123.com/c/writing-formatting/) (19): Writing apps and formatters that export KDP-ready EPUB and print PDF. - [AI Tools](https://kdp123.com/c/ai-tools/) (16): AI for text, art and covers, with what KDP does and does not require you to disclose. - [Editing & Proofreading](https://kdp123.com/c/editing/) (7): Editing software and services. - [Official KDP & Amazon](https://kdp123.com/c/official/) (11): First-party Amazon tools and help. The source of truth for rules. - [Print & Distribution](https://kdp123.com/c/print-distribution/) (11): Print-on-demand and wide distribution beyond KDP. - [Direct Sales & Storefronts](https://kdp123.com/c/direct-sales/) (4): Sell ebooks, PDFs and print books from your own store. Not allowed for ebooks enrolled in KDP Select. - [Audiobooks](https://kdp123.com/c/audio/) (7): Audiobook production and distribution. - [ISBN, Copyright & Trademark](https://kdp123.com/c/legal-isbn/) (8): Registries and search tools for identifiers, copyright and brand names. - [Ads & Promotion](https://kdp123.com/c/ads-promotion/) (12): Amazon Ads, book promotion sites and newsletter deals. - [Reviews & ARC](https://kdp123.com/c/reviews-arc/) (9): Advance reader copies and review services. - [Email & Reader Magnets](https://kdp123.com/c/email-tools/) (6): Email service providers and reader-magnet delivery. - [Sales & Rank Tracking](https://kdp123.com/c/analytics/) (6): Track sales, BSR, ads and royalties across your catalog. - [Courses, Blogs & Channels](https://kdp123.com/c/courses-blogs/) (19): Teaching resources for KDP publishers. - [Communities & Forums](https://kdp123.com/c/communities/) (9): Where KDP publishers ask questions and compare notes. ## KDP facts Rules and numbers sourced to Amazon's help pages: https://kdp123.com/facts/ - [KDP ebook royalties: the 35% and 70% options](https://kdp123.com/facts/ebook-royalties/): What royalty does Amazon KDP pay on Kindle ebooks? - [KDP hardcover royalties: 60% or 50% minus printing cost](https://kdp123.com/facts/hardcover-royalties/): What royalty does Amazon KDP pay on hardcover books? - [KDP paperback royalties: 60% or 50% minus printing cost](https://kdp123.com/facts/paperback-royalties/): How much royalty does Amazon KDP pay on a paperback? - [When and how KDP pays royalties: schedule, thresholds, methods](https://kdp123.com/facts/royalty-payments/): When does Amazon KDP pay royalties, and is there a minimum payment? - [Can you put a KDP paperback or hardcover on pre-order?](https://kdp123.com/facts/hardcover-and-paperback-preorders/): Does Amazon KDP offer pre-orders for paperback and hardcover books? - [How KDP calculates paperback and hardcover printing costs](https://kdp123.com/facts/printing-costs/): How much does Amazon KDP charge to print a paperback or hardcover? - [KDP bleed size and minimum margins by page count](https://kdp123.com/facts/bleed-and-margins/): What bleed and margin sizes does Amazon KDP require for a print book interior? - [KDP Expanded Distribution: eligibility, royalty and restrictions](https://kdp123.com/facts/expanded-distribution/): What is KDP Expanded Distribution, who can use it, and what royalty does it pay? - [KDP minimum and maximum page counts by format, paper and ink](https://kdp123.com/facts/page-count-limits/): What are the minimum and maximum page counts for KDP paperbacks and hardcovers? - [KDP paperback cover size and spine width by page count](https://kdp123.com/facts/cover-dimensions/): How do I calculate the full cover size and spine width for a KDP paperback? - [KDP proof copies and author copies: cost, limits and how to order](https://kdp123.com/facts/author-copies-and-proofs/): How do I order proof copies and author copies on KDP, and what do they cost? - [KDP trim sizes for paperback and hardcover books](https://kdp123.com/facts/trim-sizes/): What trim sizes does Amazon KDP support for paperbacks and hardcovers? - [KDP ebook file formats: manuscript and cover requirements](https://kdp123.com/facts/ebook-file-formats/): What file formats does Amazon KDP accept for Kindle ebook manuscripts and covers? - [KDP ebook pre-orders: lead time, final file deadline and penalties](https://kdp123.com/facts/ebook-preorders/): How far in advance can I set up a Kindle ebook pre-order, and what happens if I miss the deadline? - [KDP ebook pricing rules: minimum, maximum and price matching](https://kdp123.com/facts/ebook-pricing-rules/): What are the minimum and maximum list prices for a Kindle ebook on KDP? - [KDP Select rules: exclusivity, renewal, Kindle+ and promotions](https://kdp123.com/facts/kdp-select-rules/): What are the rules of KDP Select, and what do I get for enrolling? - [KENP royalties: how KDP pays for Kindle+ pages read](https://kdp123.com/facts/kenp-royalties/): How does Amazon calculate KENP page-read royalties from the KDP Select Global Fund? - [KDP AI content disclosure: AI-generated vs AI-assisted](https://kdp123.com/facts/ai-content-disclosure/): Do I have to tell Amazon KDP if I used AI to write or illustrate my book? - [KDP low-content books: definition, ISBN option and limits](https://kdp123.com/facts/low-content-books/): What counts as a low-content book on KDP, and do I need an ISBN for one? - [Publishing public domain books on KDP: differentiation and royalties](https://kdp123.com/facts/public-domain-content/): Can I publish public domain books on Amazon KDP, and what rules apply? - [A+ Content for KDP books: where to create it and what's allowed](https://kdp123.com/facts/a-plus-content/): How do I add A+ Content to my KDP book's Amazon page, and what are the rules? - [KDP book description rules: 4,000 characters and supported HTML](https://kdp123.com/facts/book-description-rules/): How long can a KDP book description be, and what HTML and content are allowed? - [KDP ISBN rules: free KDP ISBN vs your own, and ebooks](https://kdp123.com/facts/isbn-rules/): Do I need an ISBN to publish on KDP, and should I use the free KDP ISBN or buy my own? - [KDP keywords and categories: 7 keywords, 3 categories](https://kdp123.com/facts/keywords-and-categories/): How many keywords and categories can I choose on KDP, and which keywords are prohibited? - [KDP title, subtitle, series and contributor rules, plus title limits](https://kdp123.com/facts/title-and-metadata-guidelines/): What are KDP's rules for book titles, subtitles, series and contributors, and how many titles can I create? - [KDP tax interview (tax profile): W-8, withholding and treaties](https://kdp123.com/facts/tax-interview/): What is the KDP tax interview, and how much tax does Amazon withhold from my royalties? ## Glossary 34 KDP terms, one or two sentences each, sourced to Amazon: https://kdp123.com/glossary/ (plain text: https://kdp123.com/glossary.md) ## Best-of lists Criteria first, then picks with reasons, drawn from the listings below: - [Best free and one-time KDP tools: no subscriptions](https://kdp123.com/best/free-and-one-time-kdp-tools/): Which KDP tools can I use for free or buy once, without a monthly subscription? Plain text: https://kdp123.com/best/free-and-one-time-kdp-tools.md - [Best KDP keyword and category research tools](https://kdp123.com/best/kdp-keyword-and-category-research-tools/): Which tools are best for researching KDP keywords and categories? Plain text: https://kdp123.com/best/kdp-keyword-and-category-research-tools.md - [Best KDP tools for beginners: what a first book needs](https://kdp123.com/best/kdp-tools-for-beginners/): Which tools does a first-time KDP author actually need, and which can wait? Plain text: https://kdp123.com/best/kdp-tools-for-beginners.md - [Best KDP tools for romance and fiction authors](https://kdp123.com/best/kdp-tools-for-fiction-authors/): What tools do romance and other fiction authors use to write, format and promote novels on KDP? Plain text: https://kdp123.com/best/kdp-tools-for-fiction-authors.md - [Best tools for KDP coloring, puzzle and low-content books](https://kdp123.com/best/coloring-and-low-content-tools/): What are the best tools for making coloring, puzzle and other low-content books for KDP? Plain text: https://kdp123.com/best/coloring-and-low-content-tools.md ## Comparisons - [Book Bolt vs BookBeam](https://kdp123.com/compare/book-bolt-vs-bookbeam/): Book Bolt or BookBeam: which KDP research tool fits my books? - [Publisher Rocket vs KDSPY](https://kdp123.com/compare/publisher-rocket-vs-kdspy/): Publisher Rocket or KDSPY: which is better for KDP keyword and category research? - [Vellum vs Atticus](https://kdp123.com/compare/vellum-vs-atticus/): Vellum or Atticus: which book formatting software should a KDP author buy? ## Free tools Browser calculators and checkers built on the KDP facts above: https://kdp123.com/free-tools/ - [KDP royalty and printing cost calculator](https://kdp123.com/free-tools/royalty-calculator/): Royalty per sale for paperback, hardcover and Kindle ebooks on Amazon.com, with printing cost, minimum list price and the $9.99 cliff. - [KDP paperback cover size and spine width calculator](https://kdp123.com/free-tools/cover-size-calculator/): Full-wrap cover size in inches, millimetres and 300 DPI pixels, spine width by paper type, and whether spine text is allowed. - [Kindle ebook price checker](https://kdp123.com/free-tools/ebook-price-checker/): Checks a US list price against the 35% and 70% royalty bands, the file-size minimums and the 20%-below-print rule. - [KDP book description formatter and checker](https://kdp123.com/free-tools/description-checker/): Turns plain text into KDP-safe HTML and flags length, unsupported tags, unclosed tags, links, prices, reviews and emojis. - [KDP keyword slot checker](https://kdp123.com/free-tools/keyword-checker/): Checks your seven keyword slots against Amazon's list of keywords to avoid and finds words wasted on repeats. - [KDP category finder](https://kdp123.com/free-tools/category-finder/): Describe your book or paste an ASIN and get matching Amazon categories with the KDP path, list size and median price. Data from KDPTop. - [Amazon BSR to sales estimator](https://kdp123.com/free-tools/bsr-sales-estimator/): Rough daily and monthly sales for an Amazon.com Best Sellers Rank, for books and Kindle ebooks. An order-of-magnitude estimate. ## KDP market data Reports from KDPTop Research (same team as kdp123; CC BY 4.0, CSV included): https://kdp123.com/research/ - [How Much Do KDP Books Cost? Price Benchmarks from 508,737 Best Sellers (November 2026)](https://kdptop.com/research/pricing/kdp-book-prices/): KDP Best Sellers pricing, estimated sales, Kindle royalties and KU, plus print prices by page count, based on 508,737 books from November 2–8, 2026. - [Kids coloring, ages 3-5 on Amazon KDP: Market Size, Competition and Prices (November 2026)](https://kdptop.com/research/niches/kids-coloring-ages-3-5-kdp/): Kids coloring books for ages 3-5 rank 4 of 1,605 niches, with 444 estimated daily sales and a median price of $9.99 across Amazon KDP lists. - [Christmas sudoku & logic on Amazon KDP: Market Size, Competition and Prices (November 2026)](https://kdptop.com/research/niches/christmas-sudoku-logic-kdp/): Christmas sudoku and logic books rank 3rd among 1,605 KDP niches, with 132 books and estimated daily sales of 274 units. - [Kids coloring, ages 6-8 on Amazon KDP: Market Size, Competition and Prices (November 2026)](https://kdptop.com/research/niches/kids-coloring-ages-6-8-kdp/): Kids coloring books for ages 6-8 score 80 and rank 2nd among 1,605 KDP niches. The niche has 615 estimated daily sales and a low review barrier. - [How Many Reviews Does It Take to Rank on Amazon KDP? Data from 450,681 Best Sellers (November 2026)](https://kdptop.com/research/reviews/reviews-to-rank-on-kdp/): How many reviews does it take to rank on Amazon KDP? A comparison of 450,681 books by store, product type, rank tier and category in November 2026. - [Winter adult coloring on Amazon KDP: Market Size, Competition and Prices (November 2026)](https://kdptop.com/research/niches/winter-adult-coloring-kdp/): Winter adult coloring ranks 8th among 1,612 niches, with 223 estimated daily sales, an 85.3% indie share and a median of 10 reviews. - [Christmas kids coloring on Amazon KDP: Market Size, Competition and Prices (November 2026)](https://kdptop.com/research/niches/christmas-kids-coloring-kdp/): Christmas kids coloring has 257 books and estimated daily sales of 219. It scores 77 and ranks 5 of 1612 markets, with a median of just 4 reviews. - [Christmas 2026 on Amazon KDP: What Sells and When to Publish](https://kdptop.com/research/seasonal/christmas-2026/): Christmas KDP market data for 2026 covers 6419 books, estimated sales, product types, reader ages, backlist titles and seasonal search demand. - [Kids coloring on Amazon KDP: Market Size, Competition and Prices (November 2026)](https://kdptop.com/research/niches/kids-coloring-kdp/): Kids coloring ranks 1 of 1612 Amazon KDP niches, with 2175 estimated daily sales. The market has a low review barrier, with opportunities in specific age groups and holiday themes. ## Listings - [99designs](https://kdp123.com/t/99designs/): 99designs is a design marketplace owned by Vista where authors run a book cover contest or hire one designer directly. Price: From $299. - [Absolute Write Water Cooler](https://kdp123.com/t/absolute-write/): Absolute Write Water Cooler is a free, moderated writers' forum known for its Bewares board, where members report on publishers, agents and services. Price: Free. - [ACX](https://kdp123.com/t/acx/): ACX is Audible's audiobook marketplace for authors and rights holders that connects them with narrators and distributes finished audiobooks to Audible, Amazon and Apple Books. Price: Free. - [Adobe Express](https://kdp123.com/t/adobe-express/): Adobe Express is Adobe's template-based online design app for quick graphics that KDP publishers use for ebook covers, ads and social images. Price: Free tier, paid from $9.99/mo. - [Adobe Firefly](https://kdp123.com/t/adobe-firefly/): Adobe Firefly is Adobe's generative AI app for creators that makes images, vectors, video and audio from text prompts and edits existing images. Price: Free tier, paid from $9.99/mo. - [Adobe InDesign](https://kdp123.com/t/adobe-indesign/): Adobe InDesign is a professional page layout app for Windows and Mac that exports print PDF with bleed and EPUB, sold only by subscription. Price: From $22.99/mo. - [Affinity](https://kdp123.com/t/affinity/): Affinity is Canva's free all-in-one photo, vector and page layout app for designers that KDP publishers use to build print covers and illustrated interiors. Price: Free tier. - [Alliance of Independent Authors (ALLi)](https://kdp123.com/t/alli/): ALLi is a nonprofit membership association for self-publishing authors that offers a member forum, contract advice and public watchdog ratings of author services. Price: From $119/yr. - [Amazon Ads](https://kdp123.com/t/amazon-ads/): Amazon Ads is Amazon's on-platform advertising console, used by KDP publishers to promote books with sponsored ads. Price: Paid. - [Amazon Author Central](https://kdp123.com/t/author-central/): Amazon Author Central lets authors manage their author page, biography and book listings across Amazon stores. Price: Free. - [Amazon Best Sellers](https://kdp123.com/t/amazon-best-sellers/): Amazon Best Sellers is Amazon's free set of category rank lists for book researchers that shows the top-selling and hot new titles in Books and the Kindle Store. Price: Free. - [Amazon KDP](https://kdp123.com/t/amazon-kdp/): Amazon Kindle Direct Publishing is Amazon's free self-publishing platform for Kindle ebooks and print paperbacks and hardcovers. Price: Free. - [Apple Books for Authors](https://kdp123.com/t/apple-books-for-authors/): Apple Books for Authors is Apple's free portal for self-publishers that puts EPUB ebooks on Apple Books through an iTunes Connect account. Price: Free. - [Atticus](https://kdp123.com/t/atticus/): Atticus is a cross-platform book writing and formatting app that exports print-ready PDF and EPUB, sold for a one-time price. Price: $147 one-time. - [Author's Republic](https://kdp123.com/t/authors-republic/): Author's Republic is a free, non-exclusive audiobook distributor for indie authors that sends finished audiobooks to retail, library and streaming channels for 20% of royalties. Price: Free. - [AuthorScout](https://kdp123.com/t/authorscout/): AuthorScout is a book and niche discovery tool with history, categories and tracking for independent books, with a free plan. Price: Free tier, paid from $9.99/mo. - [Barnes & Noble Press](https://kdp123.com/t/barnes-noble-press/): Barnes & Noble Press is a free self-publishing service for authors that sells ebooks and print-on-demand books directly on bn.com. Price: Free. - [Blurb](https://kdp123.com/t/blurb/): Blurb is a print-on-demand book maker for photographers and self-publishers that prints photo books, trade books and magazines and can list them with retailers. Price: Free. - [Book Bolt](https://kdp123.com/t/book-bolt/): Book Bolt is a subscription app that combines niche research with a KDP-sized cover and interior designer for low-content and puzzle books. Price: From $23.99/mo. - [Book Brush](https://kdp123.com/t/book-brush/): Book Brush is an online design tool for authors that makes book ads, 3D mockups and ebook or print-wrap covers sized to KDP trim sizes. Price: From $149/yr. - [Book Design Templates](https://kdp123.com/t/book-design-templates/): Book Design Templates sells pre-designed book interior templates for Word, Pages, InDesign and Affinity Publisher, sized to standard print-on-demand trims. Price: From $39.99. - [Book Report](https://kdp123.com/t/bookreport/): Book Report is a sales and ad-spend dashboard for self-published authors that imports KDP and wide-retailer data through a browser extension. Price: Free tier, paid from $19/mo. - [Book2Color](https://kdp123.com/t/book2color/): Book2Color is a web-based AI coloring book generator for KDP sellers that creates line-art pages and exports interior PDFs in KDP trim sizes. Price: Free tier, paid from $9.99/mo. - [BookBeam](https://kdp123.com/t/bookbeam/): BookBeam is a subscription web app and Chrome extension for niche research, keyword research and ongoing tracking of books on Amazon. Price: From $47/mo. - [BookBub Partners](https://kdp123.com/t/bookbub/): BookBub Partners is a book marketing platform for authors that sells curated Featured Deal emails and self-serve auction ads to BookBub's readers. Price: From $122. - [BookBub Partners Blog](https://kdp123.com/t/bookbub-insights/): The BookBub Partners Blog is a free book marketing blog from BookBub with case studies and tips on pricing, promotions and ads. Price: Free. - [BookFunnel](https://kdp123.com/t/bookfunnel/): BookFunnel is an ebook and audiobook delivery service for authors that sends reader magnets, review copies and direct-sale files to readers. Price: From $30/yr. - [BookLife](https://kdp123.com/t/booklife/): BookLife is Publishers Weekly's site for self-published authors, with free guides plus paid reviews, a contest and promotion options. Price: Free tier. - [BookSirens](https://kdp123.com/t/booksirens/): BookSirens is an ARC distribution service for authors that promotes review copies to vetted readers and charges per download or a flat yearly fee. Price: From $10. - [Booksprout](https://kdp123.com/t/booksprout/): Booksprout is an advance reader copy platform for authors that distributes review copies to its reader community and sends automatic review reminders. Price: Free tier, paid from $9/mo. - [Bookvault](https://kdp123.com/t/bookvault/): Bookvault is a UK print-on-demand service for indie authors that fulfills direct-store orders and lists print books with retailers including Amazon. Price: Free tier, paid from GBP 24.95/mo. - [Bowker MyIdentifiers](https://kdp123.com/t/bowker-myidentifiers/): Bowker MyIdentifiers is the official U.S. agency where publishers buy ISBNs. Price: Paid. - [calibre](https://kdp123.com/t/calibre/): calibre is a free, open-source ebook manager for Windows, Mac and Linux that converts Word and other files to EPUB and includes an EPUB editor. Price: Free. - [Canva](https://kdp123.com/t/canva/): Canva is a template-based design tool widely used for KDP ebook covers, simple low-content interiors and marketing graphics. Price: Free tier, paid from $18/mo. - [ChatGPT](https://kdp123.com/t/chatgpt/): ChatGPT is OpenAI's general-purpose AI assistant that publishers use to brainstorm, draft and edit text and to generate images. Price: Free tier, paid from $8/mo. - [Claude](https://kdp123.com/t/claude/): Claude is Anthropic's general-purpose AI assistant that publishers use for brainstorming, outlining, drafting, editing feedback and book descriptions. Price: Free tier, paid from $20/mo. - [ColorCraft](https://kdp123.com/t/colorcraft/): ColorCraft is an AI coloring book app that draws the pages and exports KDP-format interior PDFs and spine-aware full-wrap covers. Price: From $32/mo. - [Creative Fabrica](https://kdp123.com/t/creative-fabrica/): Creative Fabrica is a font, graphics and template marketplace for crafters and designers that KDP publishers use for cover and interior assets. Price: From $47/yr. - [Creativindie](https://kdp123.com/t/creativindie/): Creativindie is Derek Murphy's free blog for indie authors on writing, cover design, formatting and book marketing, alongside his paid courses and templates. Price: Free. - [Dabble](https://kdp123.com/t/dabble/): Dabble is a browser-based novel writing app with plot grid, character notes, co-authoring and offline sync, sold by subscription. Price: From $180/yr. - [Damonza](https://kdp123.com/t/damonza/): Damonza is a New Zealand book design studio for self-publishers that sells custom covers, interior formatting and full launch packages. Price: From $495. - [Data Dive](https://kdp123.com/t/data-dive/): Data Dive is a subscription niche and keyword analysis tool for Amazon FBA private-label sellers, with listing building and rank tracking. Price: From $39/mo. - [DIY Book Covers](https://kdp123.com/t/diy-book-covers/): DIY Book Covers is a site by designer Derek Murphy for self-publishers that offers a free cover editor, an AI cover generator and 3D mockups. Price: Free tier, paid from $19 one-time. - [DIY Book Formats](https://kdp123.com/t/diy-book-formats/): DIY Book Formats is a site by author Derek Murphy that gives away 6x9 Word and InDesign interior templates and sells a larger premium template pack. Price: Free tier, paid from $47 one-time. - [Draft2Digital](https://kdp123.com/t/draft2digital/): Draft2Digital is an ebook and print-on-demand distribution service for publishing wide that also formats Word manuscripts into EPUB and print PDF. Price: Free tier, paid from $20 one-time. - [DS Amazon Quick View](https://kdp123.com/t/ds-amazon-quick-view/): DS Amazon Quick View is a free Chrome extension that shows Best Sellers Rank and ASIN on Amazon.com search results, with a paid Extended version. Price: Free tier, paid from $25 one-time. - [Editorial Freelancers Association](https://kdp123.com/t/editorial-freelancers-association/): The Editorial Freelancers Association is a US association of freelance editors whose free directory and job list help authors hire editors and proofreaders. Price: Free. - [ElevenLabs](https://kdp123.com/t/elevenlabs/): ElevenLabs is an AI voice platform for creators and publishers that turns an EPUB manuscript into an AI-narrated audiobook and can publish it to ElevenReader. Price: Free tier, paid from $6/mo. - [Ereader News Today](https://kdp123.com/t/ereader-news-today/): Ereader News Today is an ebook deal newsletter and website for authors that promotes free and discounted books for a per-genre fee. Price: From $40. - [Fiverr](https://kdp123.com/t/fiverr/): Fiverr is a freelance services marketplace where KDP publishers buy cover design, formatting, editing and other gigs at seller-set prices. Price: From $5. - [GetCovers](https://kdp123.com/t/getcovers/): GetCovers is a low-cost book cover design service for indie authors that sells fixed-price ebook and print-ready cover packages. Price: From $10. - [GIMP](https://kdp123.com/t/gimp/): GIMP is a free, open-source desktop image editor for Windows, Mac and Linux that publishers use to build and edit book cover artwork. Price: Free. - [Goodreads](https://kdp123.com/t/goodreads/): Goodreads is Amazon's reader community and review site where authors can claim a profile and run paid Kindle or print book giveaways. Price: Free tier, paid from $119 one-time. - [Google Docs](https://kdp123.com/t/google-docs/): Google Docs is Google's free browser-based word processor for drafting and sharing manuscripts, with comments, suggestions and EPUB, DOCX and PDF downloads. Price: Free. - [Google Gemini](https://kdp123.com/t/google-gemini/): Google Gemini is Google's AI assistant for writing, research and image generation, with paid tiers sold as Google AI plans. Price: Free tier, paid from $4.99/mo. - [Google Play Books Partner Center](https://kdp123.com/t/google-play-books-partner/): Google Play Books Partner Center is Google's free portal for publishers and authors that sells EPUB or PDF ebooks on Google Play in 75+ countries. Price: Free. - [Google Trends](https://kdp123.com/t/google-trends/): Google Trends is a free Google tool that charts relative search interest in a topic over time and by region, useful for checking book niche seasonality. Price: Free. - [Grammarly](https://kdp123.com/t/grammarly/): Grammarly is a grammar, spelling and style checker that works in browsers, desktop apps and phones, with a free tier and a paid Pro plan. Price: Free tier, paid from $144/yr. - [Gumroad](https://kdp123.com/t/gumroad/): Gumroad is a storefront and checkout for creators that lets KDP publishers sell PDFs, printables and ebooks directly, with no monthly fee. Price: Free. - [Helium 10](https://kdp123.com/t/helium-10/): Helium 10 is a subscription software suite for Amazon product sellers that includes reverse-ASIN keyword research usable on book listings. Price: Free tier, paid from $129/mo. - [Hemingway Editor](https://kdp123.com/t/hemingway-editor/): Hemingway Editor is a readability checker that highlights long sentences, passive voice and weak words, with a free web version and paid AI rewrites. Price: Free tier, paid from $19.99 one-time. - [Hidden Gems Books](https://kdp123.com/t/hidden-gems-books/): Hidden Gems Books is an ARC service for authors that sends review copies to genre-matched volunteer readers and bills per reader who signs up. Price: From $20. - [Ideogram](https://kdp123.com/t/ideogram/): Ideogram is an AI image generator with typography tools, including editable text layers, useful for typographic book cover concepts. Price: Free tier, paid from $20/mo. - [Indie Author Magazine](https://kdp123.com/t/indie-author-magazine/): Indie Author Magazine is a trade publication for independent authors covering publishing news, marketing, tools and author business profiles. Price: Free tier. - [IngramSpark](https://kdp123.com/t/ingramspark/): IngramSpark is a print-on-demand and distribution service that reaches bookstores and libraries beyond Amazon. Price: Free. - [Inkscape](https://kdp123.com/t/inkscape/): Inkscape is a free, open-source vector graphics editor for Windows, Mac and Linux that can lay out covers and low-content pages and export PDF. Price: Free. - [International ISBN Agency](https://kdp123.com/t/isbn-international/): The International ISBN Agency is the global registration authority for ISBNs, with a free directory that tells publishers which national agency to buy from. Price: Free. - [Jane Friedman](https://kdp123.com/t/jane-friedman/): Jane Friedman's site is a publishing industry blog and paid newsletter for authors that reports on trade and self-publishing business news. Price: Free tier, paid from $79/yr. - [Jungle Scout](https://kdp123.com/t/jungle-scout/): Jungle Scout is a subscription research platform for Amazon product sellers with keyword search volume and BSR-based sales estimates. Price: From $49/mo. - [Jutoh](https://kdp123.com/t/jutoh/): Jutoh is a desktop ebook editor for Windows, Mac and Linux that imports Word files and compiles EPUB and Kindle-ready books, sold for a one-time price. Price: $45 one-time. - [KBoards Writers' Cafe](https://kdp123.com/t/kboards-writers-cafe/): The KBoards Writers' Cafe is a long-running forum for Kindle self-publishers, now quieter but still open, with an archive of early KDP discussion. Price: Free. - [KDP Coloring Book Studio](https://kdp123.com/t/kdp-coloring-book-studio/): KDP Coloring Book Studio is an AI tool that turns a theme into line art, a print interior and a full-wrap cover for KDP coloring books. Price: From $7/wk. - [KDP Community](https://kdp123.com/t/kdp-community/): The KDP Community is Amazon's official forum where publishers ask questions and get answers from peers and KDP staff. Price: Free. - [KDP Cover Calculator](https://kdp123.com/t/kdp-cover-calculator/): The KDP Cover Calculator is Amazon's free web tool for paperback and hardcover publishers that gives exact full-cover dimensions and a downloadable template. Price: Free. - [KDP Help Center](https://kdp123.com/t/kdp-help-center/): The KDP Help Center is Amazon's official documentation for KDP publishers that sets out the rules on formatting, pricing, royalties, content and account setup. Price: Free. - [KDP Select](https://kdp123.com/t/kdp-select/): KDP Select is Amazon's free 90-day opt-in program for Kindle eBooks and audiobooks that puts them in Kindle+, formerly Kindle Unlimited, in exchange for eBook exclusivity. Price: Free. - [KDP Tools (kdptools.io)](https://kdp123.com/t/kdp-tools-io/): KDP Tools is a web toolkit for KDP publishers with free royalty, KENP and spine calculators plus credit-based AI niche, keyword and category tools. Price: Free tier, paid from $9.99/mo. - [KDPEasy](https://kdp123.com/t/kdpeasy/): KDPEasy is a credit-based web studio for KDP publishers that makes AI covers, puzzle, coloring and planner interiors, and listing drafts. Price: Free tier, paid from $19/mo. - [KDPTop](https://kdp123.com/t/kdptop/): KDPTop is a KDP research service that tracks Amazon Books and Kindle bestseller lists daily and scores whether a category is worth entering. Price: Free tier, paid from $19.99/mo. - [KDSPY](https://kdp123.com/t/kdspy/): KDSPY is a paid browser extension that shows category, keyword, competitor and revenue estimates directly on Amazon pages. Price: $79 one-time. - [Keepa](https://kdp123.com/t/keepa/): Keepa is a price and sales rank history tracker for Amazon products, available as a website and browser extension with a paid Pro tier. Price: Free tier, paid from EUR 29/mo. - [Kindle Create](https://kdp123.com/t/kindle-create/): Kindle Create is Amazon's free desktop app for KDP publishers that turns a finished Word or PDF manuscript into a Kindle eBook or print interior file. Price: Free. - [Kindle Previewer](https://kdp123.com/t/kindle-previewer/): Kindle Previewer is Amazon's free desktop app for KDP publishers that shows how an eBook will look on Kindle tablets, phones and E-readers before publishing. Price: Free. - [Kindlepreneur](https://kdp123.com/t/kindlepreneur/): Kindlepreneur is a free self-publishing and book marketing site with hundreds of articles, videos and four paid courses. Price: Free tier. - [Kit](https://kdp123.com/t/kit/): Kit, formerly ConvertKit, is an email marketing platform for creators that offers a free plan up to 10,000 subscribers and paid automation plans. Price: Free tier, paid from $39/mo. - [Kobo Writing Life](https://kdp123.com/t/kobo-writing-life/): Kobo Writing Life is Rakuten Kobo's free self-publishing platform for ebooks and audiobooks that sells direct to the Kobo store, Kobo Plus and OverDrive libraries. Price: Free. - [Krita](https://kdp123.com/t/krita/): Krita is a free, open-source digital painting app for illustrators that publishers use to paint cover art and children's book illustrations. Price: Free. - [Laura Jane Illustrations](https://kdp123.com/t/laura-jane-illustrations/): Laura Jane Illustrations is an illustrator's site for artists that sells Published & Printed, a self-paced course on making low-content and creative books for KDP. Price: EUR 320 one-time. - [Leonardo AI](https://kdp123.com/t/leonardo-ai/): Leonardo AI is an AI image generator with a daily free allowance that publishers use to test cover concepts before paying for a tool. Price: Free tier, paid from $12/mo. - [Library of Congress PCN Program](https://kdp123.com/t/loc-pcn/): The Library of Congress PCN Program is a free U.S. service for authors and self-publishers that assigns a Library of Congress Control Number before a print book is published. Price: Free. - [Low Content Profits](https://kdp123.com/t/low-content-profits/): Low Content Profits is a blog and course site for low-content and medium-content KDP publishers, with free interior templates. Price: Free tier. - [Lulu](https://kdp123.com/t/lulu/): Lulu is a print-on-demand and distribution platform for self-publishers that sells through its own bookstore, retail channels and the author's own store. Price: Free. - [Mailchimp](https://kdp123.com/t/mailchimp/): Mailchimp is an email and SMS marketing platform for small businesses, owned by Intuit, with a small free plan and contact-based paid tiers. Price: Free tier, paid from $13/mo. - [MailerLite](https://kdp123.com/t/mailerlite/): MailerLite is an email marketing service for small businesses and creators that includes signup forms, landing pages, automations and a free plan. Price: Free tier, paid from $12/mo. - [ManuscriptReport](https://kdp123.com/t/manuscript-report/): ManuscriptReport is a pay-per-book service that turns an uploaded manuscript into category, keyword, comp-title and marketing-copy reports for authors. Price: $69 one-time. - [MerchantWords](https://kdp123.com/t/merchantwords/): MerchantWords is a subscription Amazon keyword database for product sellers, built from Amazon search bar autocomplete data since 2012. Price: From $35/mo. - [Meta Ads Manager](https://kdp123.com/t/meta-ads-manager/): Meta Ads Manager is Meta's self-serve tool for creating and managing auction-priced ads on Facebook, Instagram, Messenger and WhatsApp. Price: Paid. - [MiblArt](https://kdp123.com/t/miblart/): MiblArt is a book cover design studio for indie authors that offers custom ebook and print covers with payment after you approve the design. Price: From $220. - [Microsoft Word](https://kdp123.com/t/microsoft-word/): Microsoft Word is a word processor that KDP accepts directly for ebooks and that can set custom page sizes for print interiors exported to PDF. Price: Free tier, paid from $99.99/yr. - [Midjourney](https://kdp123.com/t/midjourney/): Midjourney is a paid AI image generator that many publishers use for cover art and coloring page concepts, but it outputs images only. Price: From $10/mo. - [NetGalley](https://kdp123.com/t/netgalley/): NetGalley is a digital review copy platform for publishers and authors that offers advance copies to librarians, booksellers, media and reviewers. Price: From $575. - [Nicholas Erik](https://kdp123.com/t/nicholas-erik/): Nicholas Erik's site is a book marketing and advertising resource for fiction authors, with long free guides, paid courses and consulting. Price: Free tier. - [Nielsen ISBN Store (UK & Ireland)](https://kdp123.com/t/nielsen-isbn-uk/): The Nielsen ISBN Store is the official ISBN agency for publishers based in the UK, Ireland and British Overseas Territories, selling single ISBNs and blocks. Price: From GBP 93. - [Novelcrafter](https://kdp123.com/t/novelcrafter/): Novelcrafter is a browser-based novel writing app with a story wiki and optional AI that connects to the AI provider and key you choose. Price: From $4/mo. - [Pandoc](https://kdp123.com/t/pandoc/): Pandoc is a free, open-source command-line converter that turns Markdown, Word and other formats into EPUB, DOCX and, through LaTeX, PDF. Price: Free. - [Payhip](https://kdp123.com/t/payhip/): Payhip is an online store builder for creators that lets KDP publishers sell ebooks, PDFs and printables directly, on a free or flat-fee plan. Price: Free tier, paid from $29/mo. - [Photopea](https://kdp123.com/t/photopea/): Photopea is a free browser-based image editor similar to Photoshop that opens PSD files and can export PDF for print covers. Price: Free tier. - [Pinterest Business](https://kdp123.com/t/pinterest-business/): Pinterest Business is Pinterest's free business account and ads platform for promoting Pins to people searching and browsing ideas. Price: Free tier. - [Pinterest Trends](https://kdp123.com/t/pinterest-trends/): Pinterest Trends is a free Pinterest tool that shows rising and seasonal search trends on Pinterest by region and audience over the last two years. Price: Free. - [Placeit](https://kdp123.com/t/placeit/): Placeit is an Envato-owned browser mockup and template site for sellers and authors that makes book mockups and simple book cover designs. Price: From $7.47/mo. - [Plottr](https://kdp123.com/t/plottr/): Plottr is a visual outlining app for novelists and series writers that maps plot lines, scenes and characters on a timeline, with no AI features. Price: From $60/yr. - [PLR Planners](https://kdp123.com/t/plr-planners/): PLR Planners is a template shop for low-content publishers that sells editable planner and journal files with private label rights for KDP and Etsy. Price: $3 one-time. - [Procreate](https://kdp123.com/t/procreate/): Procreate is an iPad drawing and painting app for illustrators that KDP publishers use to draw coloring pages, cover art and picture book illustrations. Price: $12.99 one-time. - [ProWritingAid](https://kdp123.com/t/prowritingaid/): ProWritingAid is a grammar and style editor aimed at fiction and long-form writers that runs line-editing reports on whole manuscripts. Price: Free tier, paid from $120/yr. - [PublishDrive](https://kdp123.com/t/publishdrive/): PublishDrive is a subscription ebook, print and audiobook distributor for self-publishers that sends one upload to 50+ stores and takes no royalty commission. Price: Free tier, paid from $16.99/mo. - [Publisher Rocket](https://kdp123.com/t/publisher-rocket/): Publisher Rocket is a downloadable keyword, category and competition research app for Amazon book publishers, sold as a one-time purchase. Price: $199 one-time. - [Puzzle Maker Pro](https://kdp123.com/t/puzzle-maker-pro/): Puzzle Maker Pro is Windows software for puzzle book publishers that batch-generates 60+ puzzle types and assembles print-ready PDF interiors. Price: From $47. - [r/KDP](https://kdp123.com/t/reddit-r-kdp/): r/KDP is the main Reddit community for Amazon KDP publishers to ask practical questions and share results. Price: Free. - [r/printondemand](https://kdp123.com/t/reddit-r-printondemand/): r/printondemand is a Reddit community for print-on-demand sellers, mostly of apparel and merch on Etsy, Merch by Amazon and similar platforms. Price: Free. - [r/selfpublish](https://kdp123.com/t/reddit-r-selfpublish/): r/selfpublish is a Reddit community for self-published authors to discuss publishing, distribution and marketing beyond any single platform. Price: Free. - [Readers' Favorite](https://kdp123.com/t/readers-favorite/): Readers' Favorite is a book review and award contest site for authors that offers free reviews and paid express reviews by volunteer reviewers. Price: Free tier, paid from $59 one-time. - [Recraft](https://kdp123.com/t/recraft/): Recraft is an AI image and vector generator with custom styles, useful for decorative journal interiors and coloring page art. Price: Free tier, paid from $12/mo. - [Reedsy Blog](https://kdp123.com/t/reedsy-blog/): The Reedsy Blog is a free writing, publishing and book marketing blog run by Reedsy, the freelance marketplace for editors, designers and marketers. Price: Free. - [Reedsy Marketplace](https://kdp123.com/t/reedsy-marketplace/): Reedsy Marketplace is a curated freelance marketplace for authors that connects them with vetted editors, cover designers, marketers and translators. Price: Paid. - [Reedsy Studio](https://kdp123.com/t/reedsy-studio/): Reedsy Studio is a free browser-based writing and formatting tool that exports EPUB and print-ready PDF, with real-time collaboration. Price: Free tier, paid from $4.99/mo. - [Robin Reads](https://kdp123.com/t/robin-reads/): Robin Reads is a curated ebook deal newsletter for authors that features free or $0.99 books in genre emails for a flat per-day fee. Price: From $40. - [Scrivener](https://kdp123.com/t/scrivener/): Scrivener is a desktop writing app for long manuscripts that organizes drafts and research and compiles them to EPUB, PDF and Word. Price: $59.99 one-time. - [Self Publishing Formula (Learn Self Publishing)](https://kdp123.com/t/self-publishing-formula/): Self Publishing Formula, now branded Learn Self Publishing with James Blatch, sells author courses and runs the Self Publishing Show podcast and events. Price: Free tier. - [Self Publishing Titans](https://kdp123.com/t/self-publishing-titans/): Self Publishing Titans is a KDP training brand that also sells a Chrome research extension, puzzle and coloring makers, design tools and the KDP Masterclass. Price: From $20/mo. - [Self-Publishing School](https://kdp123.com/t/self-publishing-school/): Self-Publishing School is a paid coaching program for first-time authors that pairs one-to-one coaching with done-for-you formatting, covers and publishing. Price: From $6000. - [SellerSprite](https://kdp123.com/t/sellersprite/): SellerSprite is a subscription research suite for Amazon FBA and FBM sellers covering keywords, categories, competitors and BSR-based sales estimates. Price: Free tier, paid from $39/mo. - [Shopify](https://kdp123.com/t/shopify/): Shopify is a general ecommerce platform for small businesses that authors can use to run their own store and sell books directly to readers. Price: From $39/mo. - [Sigil](https://kdp123.com/t/sigil/): Sigil is a free, open-source EPUB editor for Windows, Mac and Linux that lets you edit an ebook's HTML, CSS and structure directly. Price: Free. - [Spotify for Authors](https://kdp123.com/t/spotify-for-authors/): Spotify for Authors is Spotify's free, non-exclusive audiobook publishing portal for self-published authors that puts audiobooks on Spotify and can pass them to Voices by INaudio. Price: Free. - [StoryOrigin](https://kdp123.com/t/storyorigin/): StoryOrigin is an author marketing app for building mailing lists, arranging newsletter swaps and group promos, and managing review copies. Price: Free tier, paid from $10/mo. - [StreetLib](https://kdp123.com/t/streetlib/): StreetLib is an ebook and audiobook distributor for authors and small publishers that reaches 50+ stores, subscription services and library platforms for a one-time fee. Price: EUR 299 one-time. - [Sudowrite](https://kdp123.com/t/sudowrite/): Sudowrite is a subscription AI writing app for fiction authors that drafts, rewrites, expands and critiques prose using credit-metered AI models. Price: From $10/mo. - [Tangent Templates](https://kdp123.com/t/tangent-templates/): Tangent Templates is a web app for low-content publishers that builds KDP interiors and covers from 130+ templates, sold for a one-time price. Price: $59 one-time. - [The Book Designer](https://kdp123.com/t/the-book-designer/): The Book Designer is a free blog for self-publishers about book design, interior layout, fonts and production, founded by Joel Friedlander. Price: Free. - [The Creative Penn](https://kdp123.com/t/the-creative-penn/): The Creative Penn is Joanna Penn's free blog and weekly podcast for authors who want to run writing as a business, including self-publishing and AI. Price: Free. - [The Fussy Librarian](https://kdp123.com/t/the-fussy-librarian/): The Fussy Librarian is an ebook recommendation newsletter for authors that sells genre-priced placements for free and bargain ebooks. Price: From $10. - [The Home Boss](https://kdp123.com/t/the-home-boss/): The Home Boss is a self-publishing training brand by Nuria Corbi for KDP publishers that offers a monthly academy, paid courses and free resources. Price: Free tier, paid from $27 one-time. - [The Self Publishing Show](https://kdp123.com/t/the-self-publishing-show/): The Self Publishing Show is a free weekly podcast for indie authors about marketing, ads, AI and the business of self-publishing. Price: Free. - [TMview](https://kdp123.com/t/euipo-tmview/): TMview is the EUIPO-led free trademark search tool for checking whether a series, imprint or brand name is already registered across the EU and partner offices. Price: Free. - [U.S. Copyright Office](https://kdp123.com/t/copyright-office/): The U.S. Copyright Office is the government registry where authors register copyrights and look up existing registrations. Price: From $45. - [USPTO Trademark Search](https://kdp123.com/t/uspto-trademark-search/): USPTO Trademark Search is the free official database for checking whether a book title, series or brand name is already trademarked in the United States. Price: Free. - [Vellum](https://kdp123.com/t/vellum/): Vellum is a Mac-only book formatter known for polished ebook and print output, sold for a one-time price. Price: $199.99 one-time. - [Voracious Readers Only](https://kdp123.com/t/voracious-readers-only/): Voracious Readers Only is a reader-matching service for novelists that sends free review copies to readers who agree to be contacted by the author. Price: Free tier, paid from $30/mo. - [WIPO Global Brand Database](https://kdp123.com/t/wipo-global-brand-database/): The WIPO Global Brand Database is a free international trademark search for checking a book series or brand name against Madrid System and national registers. Price: Free. - [Writer Beware](https://kdp123.com/t/writer-beware/): Writer Beware is a free blog and research service for writers that exposes publishing scams, predatory services and bad contract terms. Price: Free. - [Written Word Media](https://kdp123.com/t/written-word-media/): Written Word Media is a book promotion company for authors that runs the Freebooksy, Bargain Booksy, Red Feather Romance and NewInBooks reader newsletters. Price: From $20.