The best manuscript editing software depends on which edit you need. Chapter is our pick if you are still writing the book, because it drafts and edits in one place. If you already have a finished manuscript, ProWritingAid is the strongest all-round line editor and Fictionary is the best structural editor.
In this guide, you’ll learn:
- Which tool handles each level of editing: developmental, line, copy and proofreading
- What each tool costs as of October 2026, checked against the vendors’ own pricing pages
- Where the other eight tools beat Chapter, and when you should skip Chapter entirely
Here is how the nine tools compare.
Quick comparison table
| Tool | Best for | Editing level | Price (Oct 2026) | Free option |
|---|---|---|---|---|
| Chapter ★ Our Product | Writing and editing a new book in one place | Structure, consistency, proofreading | $97 one time, 2 books | No |
| ProWritingAid | Line editing a finished manuscript | Line, copy, some structure | From $10/mo yearly, $399 lifetime | Yes (500 words at a time) |
| Fictionary | Structural editing of fiction | Developmental | From $14/mo yearly | 7-day trial |
| AutoCrit | Fiction self-editing against genre norms | Line, pacing, dialogue | $15/mo yearly, $30 monthly | Yes (limited tools) |
| Hemingway Editor | Tightening sentences | Line (readability) | Free web editor | Yes |
| Marlowe | A fast whole-book critique | Developmental report | $29.95 per report | Basic version |
| Grammarly | Grammar and spelling | Copy, proofreading | Pro from $12/mo | Yes |
| PerfectIt | Consistency checks in Word | Copy (consistency) | Annual subscription | 14-day trial |
| Microsoft Word Track Changes | Working with a human editor | All levels (human-led) | Included with Microsoft 365 | No |
What is manuscript editing software?
Manuscript editing software — Tools that analyze a book-length draft and flag problems in structure, pacing, style, grammar or consistency so you can fix them before a human editor or reader sees the book.
The category covers four different jobs. Developmental tools judge plot, structure and character arcs. Line editors work on sentence rhythm and word choice.
Copy editing and proofreading tools catch grammar, spelling and inconsistencies. If those terms blur together, our breakdown of copy editing vs line editing explains where one ends and the next begins.
No single tool does all four well. That is the most useful thing to know before you pay for anything.
1. Chapter — Best if you are still writing the book
Our Pick — Chapter
Chapter writes and edits your book in one workflow. You give it your ideas, notes and voice, it builds an outline, drafts the chapters, then runs what it calls a DoubleCheck: an editor and proofreader pass over the whole book before you see it.
Best for: Nonfiction and fiction authors who want a finished, edited manuscript without stitching together four separate tools Pricing: $97 one time, 2 books included (fiction or nonfiction), 30-day money-back guarantee Why we built it: Most authors lose months moving a draft between a writing app, a grammar checker and a structural editor. Chapter keeps the drafting and editing inside the same book.
According to the Chapter product page, the $97 package includes unlimited editing, unlimited revisions and rewrites, and unlimited DoubleCheck passes. The DoubleCheck looks for consistency problems, repetition, drifting facts, voice breaks and timeline errors across the full book.
That whole-book view is the point. A grammar checker reads one sentence at a time. Chapter checks chapter 12 against your notes and catches a chapter that contradicts chapter 2.
Chapter also uses what it calls Voice DNA to keep the prose in your voice, so edits do not flatten your style. You keep 100% of the rights, and there is no subscription.
Honest limitations: Chapter has no free tier and no free trial. Its editing is built around books you create inside Chapter, and the product page does not advertise uploading a manuscript you wrote elsewhere for a standalone edit. If you already have a finished draft, the tools below are a better fit. Over 2,147 authors have used Chapter to create more than 5,000 books, and you can read an outside-in assessment in our Chapter review.
2. ProWritingAid — Best all-round line editor for finished manuscripts
Best for: Authors with a complete draft who want deep style and grammar analysis
ProWritingAid is the tool most self-editing authors end up keeping. It runs more than 20 reports across your manuscript, including overused words, sticky sentences, repeated phrases, dialogue tags, pacing and sentence length variation.
The reports are the reason it beats a plain grammar checker for books. A word you repeat 40 times across 80,000 words is invisible chapter by chapter, and ProWritingAid surfaces it in one list.
Premium also adds a Chapter Critique feature, an AI read of a single chapter that comments on story-level issues. It is useful, but it reads one chapter at a time rather than the whole book.
Limitations: The volume of suggestions can overwhelm you, and many are stylistic preferences rather than errors. The free plan only checks 500 words at a time, which is too small for real manuscript work.
Pricing: Free plan available. Premium is $30 monthly, $120 a year, or $399 lifetime. Premium Pro is $36 monthly, $144 a year, or $699 lifetime, per ProWritingAid’s pricing page. See our full ProWritingAid review and Chapter vs ProWritingAid comparison.
3. Fictionary — Best structural editor for fiction
Best for: Novelists who need a developmental edit before paying for one
Fictionary is the only tool on this list built around story structure rather than sentences. It maps your scenes against a story arc and tracks elements like point of view, scene goals, which characters appear and setting for every scene.
The result is a visual story map. You can see where your midpoint actually falls, which scenes lack a clear goal, and which characters vanish for 100 pages. That is the kind of note you would otherwise pay a developmental editor for.
Limitations: Fictionary is for fiction. Nonfiction authors get little from it. You also do a fair amount of manual tagging scene by scene, so expect a learning curve before the insights pay off.
Pricing: StoryTeller is $19 monthly or $14 a month billed yearly. StoryTeller Premium, which adds track changes and series support, is $39 monthly or $29 a month yearly. All plans start with a 7-day free trial, no card required, per Fictionary’s pricing page. More detail in our Fictionary pricing breakdown.
4. AutoCrit — Best for fiction self-editing against genre norms
Best for: Genre fiction authors who want their prose compared with published books in their genre
AutoCrit scores your manuscript against benchmarks from published fiction. It flags pacing, dialogue, adverbs, repetition, filler words and “strong writing” issues, then compares your numbers with books in your genre.
The genre comparison is its real edge. A romance and a thriller should not have the same dialogue density, and AutoCrit is one of the few tools that knows that.
The Pro plan also includes Story Analyzer+ and automated alpha and beta reader feedback. Treat that as a first pass, not a replacement for real beta readers.
Limitations: It is built for fiction, and nonfiction authors will find the genre benchmarks less useful. The interface can feel dated compared with newer tools.
Pricing: A free plan includes the full writing space plus adverb, word choice and readability tools. Pro is $30 monthly or $15 a month billed yearly, per AutoCrit’s pricing page. The page displayed conflicting figures when we checked, so confirm at checkout. See our AutoCrit pricing guide and AutoCrit review.
5. Hemingway Editor — Best free manuscript editing software for tighter prose
Best for: Cutting long, tangled sentences, on a zero budget
Hemingway does one thing. It highlights sentences that are hard to read, flags adverbs and passive voice, and gives your text a readability grade.
The free web editor is genuinely useful for a manuscript, chapter by chapter. Paste in a chapter, look for the red and yellow highlights, and rewrite until the page is calmer.
Limitations: Hemingway pushes every sentence toward short and plain. That suits nonfiction and thrillers but can strip the texture from literary fiction. It does not check structure, and the free version does not fix anything for you.
Pricing: The web editor is free. Hemingway Editor Plus, which fixes highlighted issues, checks grammar and adjusts tone, is a paid subscription with a 2-week free trial. Read our Hemingway Editor guide for how to use it without over-trimming.
6. Marlowe (Authors A.I.) — Best for a fast whole-book critique
Best for: Novelists who want a developmental-style report on a full manuscript in minutes
Marlowe reads your entire manuscript and returns a report on plot, pacing, characters, dialogue and structure. The Pro report includes an overall assessment, plot and arc analysis, and key recommendations.
It works like a cheap first-read editorial letter. You upload the book, wait, and get a document you can act on.
Limitations: It tells you what to fix but does not fix it, and it does not edit line by line. Its feedback is built on fiction conventions, so nonfiction authors should look elsewhere.
Pricing: Marlowe Pro is $29.95 per manuscript report, with a $19.95 monthly subscription that includes 4 report credits, per Authors A.I.’s pricing page. A free Marlowe Basic version exists. See our Marlowe review.
7. Grammarly — Best for grammar and spelling
Best for: A final copy edit and proofread before you send your book out
Grammarly catches spelling, grammar and punctuation errors reliably and works almost everywhere you type. For a clean final pass on a manuscript, it is hard to fault.
Limitations: Grammarly reads sentence by sentence. It knows nothing about your plot, your chapter order or your character names, and its tone suggestions lean toward business writing.
Pricing: The free plan covers basic spelling and grammar. Pro is listed at $12 a month on Grammarly’s plans page, with third-party price trackers reporting that rate for annual billing and $30 for monthly. See our Grammarly review.
8. PerfectIt — Best for consistency checks inside Word
Best for: Nonfiction authors and professional editors who need house-style consistency
PerfectIt is a Word add-in that checks consistency rather than grammar. It catches a term hyphenated two ways, inconsistent capitalization, abbreviations used before they are defined, and numbers written as words in one chapter and digits in the next.
These are the errors that make a book look self-published, and they are exactly what a grammar checker misses. Professional copy editors use PerfectIt for that reason.
Limitations: It is not a style or structure tool, and it lives inside Microsoft Word. Third-party listings name Windows, but we could not confirm Mac support from an official source, so run the trial on your own machine first.
Pricing: An annual subscription with a 14-day free trial. Third-party listings such as Capterra put it around $70 per user per year, but we could not confirm the current figure on PerfectIt’s own store.
9. Microsoft Word Track Changes — Best for working with a human editor
Best for: Any author who will hire an editor, or swap edits with a critique partner
Word is not clever, but it is the industry standard. Almost every freelance editor sends edits as a Word file with Track Changes on, and most publishers expect it.
Track Changes marks every insertion and deletion, colors each person’s edits, and lets you accept or reject them one at a time. Comments sit in the margin beside the text they refer to.
Limitations: Word does not edit anything for you. Its built-in Editor checks grammar and spelling, but the real value of Track Changes is managing edits from a person.
Pricing: Included with a Microsoft 365 subscription. If you are budgeting for a human editor, our guide to how much a book editor costs gives current rates.
Where these tools beat Chapter
We put Chapter first because it is the only tool here that drafts and edits the whole book in one place. That does not make it the right choice for every author. Here is where the others genuinely win.
You already have a finished manuscript. Chapter’s editing works on the books you create inside it. If you wrote 90,000 words in Scrivener or Word over three years, ProWritingAid, Fictionary or Marlowe will work directly on that draft. Chapter is not built as a standalone editor for outside manuscripts.
You want to keep every sentence yours. Chapter writes and rewrites. Some authors want software that only flags problems and leaves every fix to them. ProWritingAid, Hemingway and PerfectIt suggest, and you decide.
You need a structural map of a novel. Fictionary’s scene-by-scene story map shows you your own structure visually. Chapter keeps the book consistent, but it does not give you a scene-tagging dashboard to study.
You want to try before paying. Chapter has no free tier or trial, only a 30-day money-back guarantee. ProWritingAid, AutoCrit, Grammarly and Hemingway all have free versions, and Fictionary has a free trial.
You are a professional editor. PerfectIt, Word Track Changes and Fictionary’s StoryCoach plan are built for editing other people’s books. Chapter is built for authors writing their own.
You need a document a human editor can work in. Freelance editors work in Word. Whatever software you use, expect your final draft to pass through Track Changes at some point.
Best Free Manuscript Editing Software
The best free manuscript editing software is the Hemingway web editor for tightening sentences, plus the free plans of ProWritingAid, AutoCrit and Grammarly. Each free version covers one slice of the edit, so the smart move is to stack them rather than expect one tool to do everything.
| Tool | What’s free | The catch | Paid upgrade |
|---|---|---|---|
| Hemingway Editor | Web editor that highlights hard-to-read sentences, adverbs and passive voice | It flags problems but does not fix them. Grammar checks and fixes are in Plus | Hemingway Editor Plus, with a 2-week free trial |
| ProWritingAid | Grammar checks plus its line-editing reports | Each report runs on 500 words at a time, up to twice a day | Premium from $10 a month billed yearly, or $399 lifetime |
| AutoCrit | Full writing space with no word limit, plus the Adverbs, Word Choice and Readability tools | Only a select few editing tools are unlocked | Pro at $30 monthly or $15 a month billed yearly |
| Grammarly | Spelling and grammar checks, tone detection and 100 AI prompts a month | No full-sentence rewrites, and it reads one sentence at a time | Pro listed at $12 a month |
| Marlowe Basic | A free version of Marlowe’s manuscript report | The full plot, pacing and character report is Pro | $29.95 per Pro report |
Free is enough when you are polishing, not restructuring. Run your densest chapters through Hemingway, use ProWritingAid’s free reports on the chapters that worry you most, and finish with Grammarly’s free checks as a proofread. That clears a lot of noise before a human editor or beta reader sees the book.
Free stops being enough when you need the whole book at once. Repeated pet words, a sagging middle and a character who vanishes for 100 pages only show up when software reads everything together. At 500 words a check, ProWritingAid’s free plan would need more than 150 runs per report to get through an 80,000-word novel.
Structural editing has no free plan. Fictionary offers a 7-day trial with no card required, per Fictionary’s pricing page, so have your full draft ready before you start the clock. Chapter is not free either: it costs $97 one time for 2 books, with a 30-day money-back guarantee.
How do you choose manuscript editing software?
Choose manuscript editing software by matching the tool to the edit you need next. Structural problems call for Fictionary or Marlowe. Sentence-level problems call for ProWritingAid or Hemingway. Final errors call for Grammarly and PerfectIt. Writing from scratch calls for Chapter.
A practical order for a finished draft looks like this:
- Structure first. Run Marlowe or Fictionary to catch plot and pacing problems. There is no point polishing a chapter you may cut.
- Line edit second. Use ProWritingAid or AutoCrit for repetition, pacing within scenes and dialogue.
- Tighten third. Paste dense chapters into Hemingway to shorten sentences that run on.
- Proofread last. Finish with Grammarly, then PerfectIt for consistency.
- Get human eyes. Send it to beta readers or an editor, using Word Track Changes.
If you are drafting with AI, the steps shift. Our guide to editing an AI-written book covers what to check that a human-drafted book would not need.
Is manuscript editing software a replacement for a human editor?
Manuscript editing software is not a full replacement for a human editor, but it is a strong first pass. Software catches repetition, grammar and consistency errors reliably. A human editor still judges whether your book works: whether the argument lands, the ending earns its emotion, and the market wants it.
The smart move is to use software before you hire anyone. Every error you fix yourself is an error you are not paying an editor by the hour to find.
That also lets your editor spend their time on the notes only a person can give. If you are at that stage, read how to hire a book editor before you send a sample.
How we evaluated these tools
We judged each tool on five things that matter for a book, not an email:
- Manuscript-length handling. Can it work across 60,000 to 120,000 words, or does it choke past a chapter?
- Editing level. Which of the four editing jobs does it actually do well?
- Fiction vs nonfiction fit. Several tools are fiction-only in practice.
- Price for a full book. We used each vendor’s published pricing as of October 2026 and noted where it conflicted or could not be confirmed.
- Control. Does it suggest changes for you to approve, or rewrite for you?
Chapter is our product, and we have said so. We listed where the other tools beat it so you can make the call yourself. Our wider list of the best AI book editors covers AI-only options in more depth.
FAQ
What is the best manuscript editing software?
The best manuscript editing software depends on your stage. Chapter is best if you are still writing, since it drafts and edits the whole book. For a finished draft, ProWritingAid is the strongest line editor and Fictionary is the best structural editor for fiction.
Is there free manuscript editing software?
Yes, there is free manuscript editing software. The Hemingway web editor is free, and ProWritingAid, AutoCrit and Grammarly all have free plans with limits, compared in our best free manuscript editing software section.
What software do professional editors use?
Professional editors mostly use Microsoft Word with Track Changes, because publishers and authors expect it. Many add PerfectIt for consistency checks and a style guide reference. Developmental editors working on fiction sometimes use Fictionary’s StoryCoach plan to map structure for clients.
Is ProWritingAid or Grammarly better for a manuscript?
ProWritingAid is better than Grammarly for a full manuscript. ProWritingAid runs book-focused reports on repetition, pacing and dialogue across the whole draft. Grammarly is stronger for quick grammar and spelling checks, so many authors use ProWritingAid for revision and Grammarly for the final proofread.
Can AI edit a whole manuscript?
Yes, AI can edit a whole manuscript, but tools differ in how. Marlowe reads the full book and returns a critique. Chapter runs a whole-book consistency and proofreading pass on books written inside it. Most grammar checkers still work sentence by sentence rather than at book level.
