Book Editing Software: 10 Tools Authors Use in 2026

The best book editing software depends on which edit your draft needs. For sentence-level work (grammar, style, repetition, readability), ProWritingAid is the strongest all-rounder for novelists, with Grammarly and Hemingway Editor as lighter options.

For story-level problems (structure, pacing, plot holes, character arcs), you need a different category: AutoCrit, Fictionary, Marlowe, ProWritingAid's Manuscript Analysis or StoryWith AI. Most authors end up with one tool from each group, not one tool for everything.

StoryWith AI is our own product, so weigh what we say about it accordingly.

Key takeaways

• "Book editing software" covers two different jobs: line editing (sentences) and developmental analysis (story). No single tool does both well.
• ProWritingAid Premium is $120 a year and works inside Word, Google Docs and Scrivener. It is the best fit for line editing a full novel.
• Grammarly and Hemingway are fine for clean prose, but neither reads your book as a story.
• For story-level feedback, Fictionary suits writers who want a guided structural edit, Marlowe suits writers who want a one-off report, and StoryWith AI suits writers who want ranked, scene-linked findings plus reader feedback.
• Honest free options exist: Hemingway's web editor, Grammarly Free, ProWritingAid Free (500 words at a time), Marlowe Basic, AutoCrit Free and StoryWith AI Free.
• None of these replace a human editor. They make the paid edit cheaper by clearing the issues software can catch.

What does book editing software actually edit?

There are three levels to editing a book, and software is uneven across them.

Developmental (story) editing asks whether the book works: does the plot hold, do the stakes rise, does each character change, does the middle sag. Line editing asks whether each sentence works: rhythm, repetition, clarity, word choice. Copyediting and proofreading catch errors: grammar, spelling, punctuation, consistency.

Grammar tools are strong on the last two levels and weak on the first. Story analysis tools are the reverse. If your beta readers say the middle drags, Grammarly will not help. If your sentences are tangled, a plot report will not fix them.

Edit in that order: story first, then lines, then proofread. Polishing sentences in a chapter you later cut is wasted effort. Our self-editing checklist walks through the passes in sequence.

The 10 tools at a glance

Prices as listed on each vendor's own page on 19 October 2026. AutoCrit's pricing page showed two conflicting sets of figures on 19 October 2026, so the AutoCrit row uses its AutoCrit vs ProWritingAid page, which lists $30 a month and $180 a year. Grammarly's plans page shows Pro as $12 without stating the billing period; its billing help page lists $30 monthly, $60 quarterly or $144 yearly, a $12 monthly average. Scrivener's store page showed the iOS price in page text but not the Mac and Windows prices.

Which tools are best for grammar and line editing?

ProWritingAid

ProWritingAid is the line editor most novelists end up keeping. Beyond grammar, it runs 25+ writing reports (repeated words, sentence length, pacing, dialogue tags, sticky sentences).

As listed on prowritingaid.com/pricing on 19 October 2026, Premium is $30 month to month or $120 billed yearly, and Premium Pro is $36 month to month or $144 yearly. Lifetime licences are $399 and $699. Premium includes one Chapter Critique a day; Premium Pro raises that to 30 and adds live workshops.

The free plan checks 500 words at a time, which is enough to test it on a scene but not to work through a manuscript. It plugs into Word, Google Docs and Scrivener, so you can edit where you already write.

Best for: a full line-editing pass on a 70,000 to 120,000-word novel. Our ProWritingAid alternatives guide covers when it is the wrong pick.

Grammarly

Grammarly is the cleanest proofreader for everyday prose and the widest on platforms: browser extensions, Windows and Mac apps, Word, Google Docs and mobile.

As listed on grammarly.com/plans on 19 October 2026, Free covers spelling, grammar and tone detection with 100 AI prompts a month. Pro is shown as $12 with no billing period stated; Grammarly's billing help page lists $30 a month, $60 a quarter or $144 a year ($12 a month on average). Pro adds full-sentence rewrites, tone adjustment, plagiarism and AI-text detection, and 2,000 AI prompts a month.

The catch for fiction: Grammarly is tuned for business clarity. It will flag deliberate fragments and voicey dialogue that a novelist wants to keep. Use it as a final proofread, not a style guide for your narrator.

Hemingway Editor

Hemingway does one thing: it highlights hard-to-read sentences in yellow and red, flags passive voice, weakening words and simpler alternatives, and scores readability against a target you set. Its help pages describe each highlight type.

The web editor is the free version. As listed on hemingwayapp.com/hemingway-editor-plus on 19 October 2026, Editor Plus is $100 a year (5,000 AI sentence rewrites a month) or $150 a year (10,000), with a 2-week trial and no card. The Classic desktop app is $19.99 for Mac or Windows and does not include the AI features.

Best for: tightening an overwritten draft. Do not chase a low grade on literary prose.

Which tools analyze the story itself?

AutoCrit

AutoCrit mixes line-level reports with story feedback. Its Story Analyzer covers plot development, character arcs, conflict and setups that need payoffs, pacing, point of view, timeline and worldbuilding, plus a genre fit check.

AutoCrit's pricing page showed two conflicting sets of figures when we checked on 19 October 2026. Its comparison page lists Pro at $30 a month or $180 a year and says Pro members get unlimited AI analysis. A Free plan exists with a limited set of tools (adverbs, word choice, readability). Confirm the price at checkout.

Best for: genre fiction writers who want line tools and story feedback in one web app. See our AutoCrit alternatives post for the trade-offs.

Fictionary

Fictionary is built around structural editing. Its homepage describes tightening plot, characters and settings toward the right structure for your genre, with an AI instructor, Edwina, giving scene-specific feedback.

As listed on fictionary.co/pricing on 19 October 2026, StoryTeller is $19 a month or $168 a year, StoryTeller Premium is $39 a month or $348 a year (10 manuscripts, track changes, series), and StoryCoach for editors is $49 a month or $396 a year. Every plan has a 7-day free trial with no card.

Best for: writers willing to do the structural work themselves with a framework.

Marlowe by Authors A.I.

Marlowe is a report you run on a finished draft. You upload a .docx or ePub of at least 20,000 words and get analysis of plot structure, character, pacing, dialogue balance, theme and genre comparison against bestsellers, according to the Marlowe page.

As listed on authors.ai/pricing on 19 October 2026, Basic reports are free and unlimited. Pro is $19.95 a month or $159 a year for four Pro reports a month, and a single Pro report is $29.95.

Best for: a one-off read of a complete draft before revision. It is a report, not a workspace, so you revise elsewhere.

ProWritingAid Manuscript Analysis

ProWritingAid sells story-level analysis separately as credits. One credit analyzes a whole story up to 300,000 words, covering plot holes, characterization, weak climaxes, pacing, structure, timeline errors and worldbuilding, according to its feature page.

As listed on prowritingaid.com/credits on 19 October 2026, one credit costs $50 on a free account, $35 with Premium and $25 with Premium Pro. Plans include no credits.

Worked out: a year of Premium ($120) plus one analysis ($35) is $155. If you already pay for Premium, adding one story read per draft is the cheapest way to get both levels from one vendor.

StoryWith AI

StoryWith AI reads the manuscript you wrote and answers editorial questions about it. Analyzers cover structure, setups and payoffs, pacing and emotional arc, dialogue, continuity and plot holes, theme, scene purpose and character arcs. Every finding goes into one ranked list, sorted by severity and linked to the exact scene. The features page lists what each analyzer checks.

It also lets you test chapters on three to five simulated reader personas (a first pass, not evidence of how real readers respond) and, on the paid Author and Pro plans, invite up to 20 real beta readers through a share link. A book-level pass of a 90,000-word novel uses about 18 AI text actions, and importing the manuscript costs 5 more, once. So the free 50 actions cover the import and one book-level pass with about 27 left over, not scene-level analysis of every scene.

It does not proofread inside Word or Google Docs. Pair it with ProWritingAid or Grammarly for that.

What about writing apps with editing features?

Scrivener 3

Scrivener is a drafting environment, not an editor, but it has revision tools that matter: snapshots before a big rewrite, a compare view to see what changed, comments and annotations, and a corkboard for restructuring. ProWritingAid's integration works with Scrivener files.

On the Literature and Latte store on 19 October 2026, the iOS and iPadOS version was listed at $23.99 and a 30-day free trial was offered. The Mac, Windows and bundle licence prices did not appear in the page text, so check the store page for your platform.

Atticus

Atticus is a formatting and writing tool at $147 one-time, as listed on atticus.io on 19 October 2026. Its homepage lists word counts, goals and chapter organization, but does not list grammar checking or story analysis. Buy it to format, not to edit.

Which do you need for your stage of draft?

Tool features as described on each vendor's own page on 19 October 2026.

A practical stack: one story tool on the finished draft, ProWritingAid for the line pass, then a human editor.

What are the honest free options?

You can edit a book well without paying, if you accept limits.

• Hemingway web editor: free readability highlights with no AI rewrites (grammar and spelling highlights need Plus, per its help page).
• Grammarly Free: spelling, grammar and 100 AI prompts a month.
• ProWritingAid Free: the full report set, but 500 words at a time. Fine for a scene, painful for a novel.
• AutoCrit Free: a limited tool set (adverbs, word choice, readability) with no word limit.
• Marlowe Basic: free reports on drafts over 20,000 words.
• StoryWith AI Free: every analyzer (with basic continuity and coverage scans), unlimited books, 50 one-time AI text actions, no card.
• Fictionary: no free plan, but a 7-day trial is long enough for one focused structural pass if you prepare first.

For "novel editing software free" searches, the realistic free stack is Marlowe Basic or StoryWith AI Free for story, plus Hemingway and Grammarly Free for prose. You can also paste a chapter into the free manuscript readiness score to see where a sample stands.

Where StoryWith AI fits

StoryWith AI is a story-level tool. It is the right pick when you have a complete or near-complete draft and want to know what is broken, ranked by severity, with each issue tied to a scene. The reader sessions help when you want early reactions before recruiting human beta readers.

It is the wrong tool if your main problem is sentences. It does not do grammar or line-level proofreading in your word processor, so ProWritingAid or Grammarly is the better fit there. It is also the wrong tool if you want a guided framework to fill in scene by scene; that is Fictionary's strength.

And it is not a human editor. It is a first pass, so the money you spend on an editor goes on judgment rather than on issues software can spot. Plans are on the pricing page.

Frequently Asked Questions (FAQ)

What is the best book editing software for novelists?

For line editing, ProWritingAid is the strongest fit for fiction because of its style reports and Word, Google Docs and Scrivener integrations. For story-level problems, pick a developmental tool such as Fictionary, Marlowe, AutoCrit or StoryWith AI. Most novelists use one of each.

Is there free novel editing software?

Yes. Hemingway's web editor, Grammarly Free, ProWritingAid Free (500 words at a time), AutoCrit Free, Marlowe Basic and StoryWith AI Free all cost nothing, as listed on their sites on 19 October 2026. Each has limits, so combine a free story tool with a free prose tool.

Can AI book editing software replace a human editor?

No. Software is good at patterns: repetition, readability, pacing signals, continuity slips. A human editor judges whether the book delivers on its promise to readers. Use software first so the editor's time goes on the problems only a person can see.

Is Grammarly good enough to edit a novel?

Grammarly is good for proofreading a novel, but it is designed around clear business writing and often flags deliberate fiction choices such as fragments or dialect. It does not analyze plot, pacing or character. Use it for the final error pass.

What is the difference between manuscript editing software and a grammar checker?

A grammar checker works on sentences. Manuscript editing software in the developmental sense reads the whole book and reports on structure, pacing, characters and plot holes. ProWritingAid sells both, with Manuscript Analysis priced separately as credits.

How much should I budget for book editing software?

A workable setup runs from $0 (free tiers only) to about $155 a year for ProWritingAid Premium plus one Manuscript Analysis credit, using prices listed on 19 October 2026. Adding a story subscription such as Fictionary StoryTeller ($168 a year) or StoryWith AI Author ($149 a year) brings the total to about $304 to $323 a year.

The short answer

Buy for the job, not the category. If your sentences need work, start with ProWritingAid, and use Hemingway or Grammarly if you want something lighter.

If your story needs work, run Marlowe, ProWritingAid Manuscript Analysis or StoryWith AI on the full draft, or use Fictionary for a guided structural edit. Then hand the cleaner draft to a human editor.