How Fred edits
Fred reads the whole book before he edits a sentence.
Wordsmith is an AI developmental editor that reads a complete manuscript before giving feedback. It follows structure, characters, continuity, pacing, and voice across chapters, then grounds suggestions in the writer's own text. It helps writers diagnose and revise a book without asking a general chatbot to reason from isolated excerpts.
By the Wordsmith team · Reviewed by Yash Wanvari · Last reviewed
What is an AI developmental editor?
A developmental edit is the big-picture pass: not commas and spelling, but whether the book works. What is it about, does the structure carry it, do the characters earn what happens to them, where does it drag, and what has to change in the next draft. It is the edit that comes before copy-editing and proofreading, and it is the one that changes a manuscript most.
An AI developmental editor does that job in software. The useful distinction is not the model but the unit of work: a developmental read has to take in the entire manuscript before it can say anything worth acting on, because the problems it exists to find (a slack middle, a promise made in chapter 2 and dropped by chapter 30, a protagonist whose motivation never quite lands) are invisible from inside any single chapter.
How does Wordsmith read a whole manuscript?
You upload the manuscript as a single file. Before any feedback is produced, the full text is assembled into one corpus and read end to end in a single pass, which is where the book-level picture comes from: what it is, how it is built, who is in it, and what it is promising the reader. That pass takes minutes rather than seconds, and it happens once, up front.
What comes out of it is a structured memory of the book that every later pass reads from. The close work then proceeds chapter by chapter, but it is never working blind: each chapter is edited against what the whole-manuscript read established. Continuity is re-swept as you revise, so a change in chapter 4 is checked against what chapter 30 already assumes.
Manuscripts up to about 150,000 words go through this pipeline, uploaded as .docx, .pdf, .epub, .md, .txt, .adoc, and .zip files up to 25MB. Longer works are best split into volumes and uploaded separately.
What can it catch?
Five dimensions, each handled by its own pass over the book. The quotes below are from writers who have used it, published here with their permission.
Structure
The read opens with a verdict on what the book is doing: what the spine is, where the argument or arc goes slack, which chapters carry weight and which are doing a job another chapter already did. Where a restructure is warranted, it says so and shows the order it has in mind.
“It's hard to see your own material as an outside reader, which is exactly what an editor is for. Fred did that for me, catching the central tension right away: whether my book is a memoir with an argument, or a philosophy of selfhood illustrated by memoir.”
Character and point of view
A dedicated pass builds an overview of who is in the book, what each person wants, and where motivation is asserted rather than earned. A second pass tracks point of view: whose head the reader is in, and where the camera slips without meaning to.
“It was honestly really helpful. It's easy to communicate with it, it instantly picked up what I was putting down regarding themes and character motivations, and it was really clear about what the manuscript needed. I've used ProWritingAid's beta reading AI before, and it felt entirely like a yes-man. Fred actually gave critiques, which was super, super helpful.”
Continuity
Continuity is the failure a chapter-at-a-time reader cannot catch. A consistency pass holds the book's facts, timeline, and unkept promises against each other across chapters, retrieving the actual passages that conflict rather than reasoning from memory, and sweeps again as you revise.
Pacing
A pacing pass maps where the book moves and where it stalls: the chapter that takes four thousand words to do one thing, the middle that repeats a beat, the ending that arrives before the reader is ready for it.
Voice and line craft
The line pass reads for rhythm and register rather than rules. Its instruction is to leave your voice alone: when a proposed line lands flatter or plainer than the prose around it, it is demoted to a comment instead of a suggested change.
“My book had already been through two professional editors, one structural and one proofreading, plus my own AI pass, all to Chicago style. Fred still surfaced suggestions I found genuinely useful. I'd want to use this on a book, even more so if the prose were rougher.”
Wordsmith, a general chatbot, and a human editor
Three different tools for three different moments in a draft.
Scroll the table sideways to compare all three →
| Dimension | Wordsmith | A general chatbot | A human developmental editor |
|---|---|---|---|
| Manuscript context | Reads the complete manuscript end to end in a single pass before it says anything, up to 150,000 words. | Works from whatever you paste in. A book-length draft has to be fed in pieces, so each answer sees a fraction of it. | Reads the whole book, and brings every other book they have edited to the reading. |
| Evidence from your text | Findings are anchored to the passages that prompted them, quoted from your file, so you can check the reasoning against the page. | Can quote what you pasted, but its instinct is to regenerate rather than cite, and it will supply specifics you never gave it. | Cites chapter and page from their own notes on your manuscript. |
| Structural and continuity diagnosis | Separate passes for structure, pacing, character, point of view, and cross-chapter consistency, re-checked as you revise. | Will answer a structural question, but keeps no map of the book, so contradictions between chapter 3 and chapter 27 go unnoticed. | The heart of the job, and still the best option when the diagnosis is subtle. |
| Genre judgment and coaching | Names the genre and comparable titles and holds the read to that frame. It does not coach you or shape a career. | Genre talk stays generic, and the default posture is agreement rather than judgment. | Judgment shaped by the market, plus a working relationship that develops across drafts. |
| Writer control | Suggests, never overwrites. Nothing enters your manuscript until you accept it, and you can reject a suggestion or argue with it. | Hands back a rewritten passage, so the default output is a replacement for your prose. | Advises; you decide what to revise. Complete control. |
| Cost and turnaround | $50 once per manuscript. The first full read comes back in an afternoon. | Free or a monthly subscription. Instant, but unstructured. | Commonly four figures for a book, and several weeks of waiting. |
| Best-fit use | Diagnosing and revising a finished draft, including before you commission a human edit or submit. | Quick questions about a paragraph or a page. | Final structural judgment on a book going to submission or print, and any time you need a partner rather than a tool. |
How is this different from pasting chapters into ChatGPT?
Two differences, and the first causes the second. A general chatbot sees whatever you paste into the window. Paste a chapter and you get a competent response to that chapter, but the failures a developmental edit exists to catch live between chapters, so the excerpt-by-excerpt read cannot see them. It has no persistent map of your book, which means it also cannot tell you that chapter 27 contradicts chapter 3.
The second difference is posture. General assistants are built to produce text, so asking one to improve a passage tends to return a regenerated version of it, which is how the voice goes. They also default to agreement, which is pleasant and useless when you need a diagnosis. Wordsmith is built to read and respond: it works in the margins with comments and suggestions anchored to your passages, and it is willing to tell you the book is not working yet.
Does Wordsmith rewrite the writer’s voice?
No. It suggests; it never overwrites. Nothing enters your manuscript until you accept it, and you can reject any suggestion or argue with it.
Structural feedback is comments only, by design: at that altitude it will tell you a transition is missing but will not write the transition for you, because a note sharp enough to act on is worth more than a rewrite that takes the pen out of your hand. Line-level passes do propose specific replacement wording, shown as a tracked change you accept or reject one at a time. Those suggestions are checked for register: if a proposed line reads flatter or plainer than the prose around it, it is demoted to a comment rather than offered as an edit.
More on why we build it this way in the Wordsmith manifesto.
What does the writer receive?
- A developmental letterThe keepable document: what the book is doing, what is working, what needs to change, and in what order. Modelled on the structural edit letter an editor at a publishing house sends, and exportable as a PDF you can print and work through.
- An editorial readThe book at a glance: a verdict with the evidence behind it, genre and comparable titles, a character and point-of-view overview, the emotional arc, pacing, and the consistency findings.
- Inline suggestions and commentsChapter by chapter, anchored to the passages they refer to. Accept, reject, or argue with each one.
- A marked-up Word documentExported with real tracked changes and comments, so you can take the edit into Word or Google Docs and work the way you already do.
- A chapter-by-chapter view of where the draft standsPlus a running conversation with Fred about the manuscript while you revise.
When should a writer still hire a human developmental editor?
Wordsmith supports editorial judgment; it does not replace a professional human editor. Hire one when the book is going out to agents, publishers, or print and you want a person accountable for the call. Hire one when the diagnosis is genuinely contested, when the question is about the market rather than the manuscript, or when what you need is a relationship that develops across drafts and knows your career rather than your file.
What Wordsmith changes is the economics of the drafts before that one. A structural read that costs $50 and comes back the same afternoon is one you can afford to run on every revision, which means you can arrive at the human edit with the obvious problems already solved and spend that money on the judgment only a person can give.
Pricing, refunds, and what it is not for
Current pricing
A manuscript is $50 once, per book, and it is yours to keep. Short pieces up to 15,000 words are covered by a separate $10 per month plan. Fred marks up a sample of your manuscript before you pay anything, and the developmental letter and full chapter-by-chapter edit unlock with the purchase. Full details on the Wordsmith pricing page.
Refund terms
Payments are non-refundable except where the law requires otherwise, though we may issue a refund at our discretion. A one-off manuscript purchase is non-refundable once the edited work has been delivered to you. The free sample markup exists so you can judge the work before you pay. The full policy is in section 7 of the Wordsmith terms and conditions.
Good fit
A complete or near-complete draft where voice and craft carry the work: fiction, memoir, personal essays, longform, and nonfiction built on an argument. The more there is to read into, the more useful the read.
Exclusions and limitations
- There is no dedicated support for poetry or screenplays; the craft passes assume prose.
- PDF uploads are not supported. Accepted formats are .docx, .pdf, .epub, .md, .txt, .adoc, and .zip files up to 25MB.
- One manuscript is capped at about 150,000 words. Split longer works into volumes.
- The whole-manuscript pass is a full end-to-end read, but close chapter work proceeds as you go. When the detailed work is only partly done, the letter says so rather than implying a completed close read.
- It is designed to tell you when a chapter is ready and to stop rather than keep suggesting changes for their own sake. That is how the system is built, not a promise about your book.
- It is not a proofreader, a formatter, or a substitute for a professional human developmental editor.
Frequently asked questions
Does it work for nonfiction and memoir, or only novels?
Both. Every craft pass runs on every manuscript, with a nonfiction lens applied where it matters, so an argument-driven book gets structural scrutiny in the same way a novel does. It suits fiction, memoir, personal essays, longform, and essays of ideas. There is no dedicated support for poetry or screenplays.
What file formats can I upload?
Word documents (.docx), PDF (.pdf), EPUB (.epub), Markdown (.md), plain text (.txt), AsciiDoc (.adoc), and a zipped AsciiDoc folder (.zip), up to 25MB. PDFs need selectable text — a scanned manuscript must be run through OCR first — and EPUBs must be free of DRM.
How long can a manuscript be?
Up to about 150,000 words in one manuscript. Longer works should be split into volumes and uploaded separately. Short pieces up to 15,000 words go through the short-piece editor instead.
Do I have to pay before I see anything?
No. Fred marks up a sample of your manuscript first, so you can judge the quality of the read before you decide. The developmental letter and the full chapter-by-chapter edit unlock with the $50 purchase for that manuscript.
Will you train AI on my manuscript?
No. You own everything you upload. It is stored encrypted in your account and seen only by you, and by us when you ask for support. The models we use run under API terms that forbid training on your text. The only thing we learn from is which suggestions writers accept or reject, and that signal never includes your words.
Can I get a refund?
Payments are non-refundable except where the law requires otherwise, though we may issue a refund at our discretion. A one-off manuscript purchase is non-refundable once the edited work has been delivered to you. The free sample markup exists so you can judge the work before you pay.
Does this replace a human developmental editor?
No. It gives you a structural read on demand, at a price and turnaround that make it practical to use on every draft. A human editor brings market judgment, a relationship that develops over time, and accountability for the call they make. Many writers use Wordsmith to arrive at a human edit with the obvious problems already solved.
Explore how Fred edits
Practical guides for deciding what your manuscript needs, preparing the draft, understanding the read, and acting on the edit.
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