53 small tools, each doing one job
Titles, blurbs, keyword ideas, a royalty calculator, characters, press copy. 7 run on PenWriter’s own code and cost nothing; the other 46 ask the model and say beforehand about how many credits a run costs. Nothing is saved to a book until you press a button on the result.
Every tool
All of them
Book ideas
about 10 credits
Different books you could write from a topic, a keyword or a sentence.
Novel idea maker
about 10 credits
Full premises for a novel: who, what they want, what is in the way, what is at stake, and a twist.
Title generator
about 7 credits
Titles for a book, each checked against KDP's title rules.
Subtitle generator
about 7 credits
Subtitles that say who a book is for or what it gives the reader, held to KDP's length limit.
Logline generator
about 7 credits
A one-sentence pitch for the story, in several different emphases.
Chapter title generator
about 7 credits
Titles for a chapter, from what happens in it.
Outline generator
about 31 credits
A chapter-by-chapter outline that follows a plot structure you choose.
Series planner
about 31 credits
A plan for a series: one book after another, each with its own story and a thread that runs through them.
Synopsis writer
about 10 credits
A one-page synopsis of the whole story, ending included, in the present tense.
Character creator
about 10 credits
People for your story, with a want, a flaw and a voice, ready to add to your cast.
Character names
about 10 credits
Names by culture and era, with what they mean.
Antagonist builder
about 10 credits
Opponents with a reason: what they want, how they work against your hero and what undoes them.
Plot twist generator
about 10 credits
Twists that can be planted early, with the clue to plant and the moment to reveal them.
Conflict generator
about 10 credits
Conflicts for a scene or a book, with what is at stake and how each could escalate.
Story starter
about 10 credits
Openings you can continue from: a few lines each, and a question for what happens next.
Writing prompts
about 7 credits
Prompts to get you writing: a situation, a what-if, a constraint.
Dialogue generator
about 10 credits
An exchange between your characters, with what is not said.
Scene builder
about 31 credits
A scene drafted from what the people want, what blocks them and where they are.
Place generator
about 10 credits
Places for your story: how they look, how they feel and what they do for the plot.
World builder
about 31 credits
The shape of a world: its land, peoples, history, power and daily life, and where it is under strain.
First-chapter hook
about 7 credits
Opening lines that pull a reader in, with what each one does.
Chapter endings
about 7 credits
Ways to end a chapter so the reader turns the page.
Sensory details
about 7 credits
What a moment looks, sounds, smells, feels and tastes like, in specifics you can use.
Paraphrasing tool
about 10 credits
Your text in other words, with the same meaning, in the same language.
Grammar and style checker
no credits
Typing slips, repeated words, quotation marks and tense, with the exact words. Free and instant.
Readability checker
no credits
How long it takes to read, how long the sentences run, the reading level, and where it drags. Free and instant.
Originality assessment
about 10 credits
An honest read of how familiar a passage feels: stock phrases, well-worn patterns, and ways to make it more yours.
An opinion from the model
Word counter
no credits
Words, characters, sentences, reading time, pages and reading level. It runs in your browser, so nothing leaves the page.
Blurb generator
about 10 credits
Store descriptions in several versions, each checked against KDP's description rules and its 4,000-character limit.
Blurb SEO optimiser
about 10 credits
Rework a description so the words readers search with appear where they read naturally. No keyword stuffing.
A pattern check, not proof
Keyword research
about 10 credits
Search phrases readers might use, with an estimate of demand and competition in words, and the seven worth putting in KDP's boxes.
An estimate, not Amazon's data
Competition analyser
about 10 credits
How crowded a niche looks, what the leading books tend to do, and where there is room, read from the books you name and a public library catalogue.
An estimate, not Amazon's data
Niche finder
about 10 credits
Niches you could write for, with an estimate of how crowded each looks and the phrases to start with.
An estimate, not Amazon's data
Trend spotter
about 10 credits
Directions a genre or subject seems to be moving in, with what each rests on, and a book idea for each. An estimate, not live data.
An estimate, not Amazon's data
Category finder
about 7 credits
Shelves your book fits, chosen from PenWriter's own shelf guide. KDP takes up to three.
An estimate, not Amazon's data
Royalty calculator
no credits
What a Kindle book, a paperback or a hardcover pays per sale and per month, worked out from KDP's published tables. Free.
Printing cost, spine and cover size
no credits
What a copy costs to print, the lowest list price KDP accepts, the spine width and the size of the flat cover, from KDP's published tables. Free.
Author bio
about 7 credits
Short, medium and long versions of your bio, from the facts you give. Anything it adds that you did not say is flagged.
Pen name generator
about 7 credits
Names to publish under, in the style you choose.
A+ content
about 31 credits
Copy for your book's A+ modules that keeps to KDP's A+ guidelines: no prices, promotions, links or comparisons.
Back matter
about 7 credits
The pages at the end of a book: a thank-you, an honest-review request, other books, and a newsletter invitation.
Copyright page
no credits
A copyright page from a template, with the lines most self-published books carry. Not legal advice. Free.
Dedication
about 7 credits
Dedications in a few voices: warm, funny, formal, short.
Reading group questions
about 7 credits
Questions for a book club to discuss, with the theme each opens up.
AI-content detector
no credits
A report on the patterns in a text that often appear in model-written prose. A heuristic, not proof, and never a verdict. Free.
A pattern check, not proof
Voice rewriter
about 10 credits
Rewrite a passage so it sounds like you, using your own writing as the sample. Same meaning, same facts.
Social captions
about 7 credits
Captions for Instagram, Threads, X or Pinterest, held to that platform's own length, with no quotation that is not your line and no claim you did not give.
Thread writer
about 10 credits
A short thread for X or Threads, each post inside that platform's limit, that reads straight through. No invented quotes, no claims you did not make.
Short video script
about 10 credits
A script for a short vertical video (a reel or a short): a hook, a few beats, on-screen words and a closing line, sized to the seconds you choose. Nothing in it is quoted that is not your line.
ARC invitation
about 7 credits
A message inviting a reader, a blogger or another author to read an advance copy. The copy is free and a review is optional: nothing in it buys or steers one, as KDP's rule requires.
Review request
about 7 credits
A short, honest ask for a review of the finished book, for an email, a social post or the end of the book. It never asks for a good review, and it never offers anything for one.
Press release
about 10 credits
A one-page release for a book, written from the facts you give: headline, lead, body and an About the author paragraph. It never quotes anyone, because PenWriter does not make up what a person said.
Press one-sheet
about 7 credits
The words for a one-page sheet: a tagline, a pitch, a few points and who the book is for. They stay inside the facts you give, and name no other book or author.
5 groups
- Book planning
- Ideas, titles, outlines and series, before the writing starts.
- Writing help
- People, places, scenes and dialogue, and checks for the words themselves.
- KDP help
- The listing, the market and the money, for Amazon KDP.
- Book tools
- Work on a whole text: how it sounds and how it reads.
- Launch and reach readers
- Posts, scripts, invitations and press copy for telling readers, reviewers and the press about a book.
A tool that estimates, checks a pattern or gives an opinion says so under its result. Keyword and niche results are never Amazon’s own data. Credits are explained on Pricing.