Grammar Check
for Fiction Writers
Grammarly doesn't understand dialogue, intentional fragments, or narrative voice. This one does.
Free up to 2,500 words a run — bring your whole manuscript to the paid tools.
Fix The Whole Manuscript
Checking one scene while forty more wait in the drawer is not a plan. Our core engine, Kill Your Darlings, runs grammar correction across your entire 80,000-word manuscript in one pass — plus slop removal, line editing, and continuity checks that catch the problems grammar checkers can't see.
Fix The Whole Manuscript →What it actually catches
Six spelling errors, one comma splice, two capitalization fixes. Voice untouched.
Grammar Check for Fiction Writers: What You Actually Need
Most grammar checkers are built for business writing. They want every sentence to be a complete grammatical unit. They hate fragments. They flag and at the start of a sentence. They correct "ain't" in dialogue. They want your character to speak the way a spreadsheet speaks. That is not how fiction works.
Fiction has rules that grammar checkers don't understand. A first-person narrator can drop into fragments for emphasis. Dialogue uses its own punctuation logic — the comma goes inside the quotation mark, the dialogue tag is lowercase even when it follows a question mark, and the em-dash handles interruptions that a period can't. A tight close-third POV can lean on incomplete thoughts because that's how minds work. None of that is wrong. It's craft.
This grammar checker was built by developmental editors who edit novels for a living. It knows the difference between a grammar mistake (I seen it) and a stylistic fragment (Cold. Black. Gone.). It knows that said is not a dialogue tag problem. It knows that voice matters more than correctness, and the checker's job is to catch the mechanical errors that readers notice and fix nothing else.
What It Checks
- Spelling — including the fiction-specific traps: peek / peak / pique, reign / rein, rouge / rogue, waist / waste, pore / pour, breach / breech.
- Punctuation — especially dialogue punctuation, which is the single most common mistake in self-edited manuscripts.
- Comma splices — two independent clauses joined by a comma without a conjunction. Kills pacing, flags you as an amateur.
- Subject-verb agreement — including tricky cases with collective nouns, compound subjects, and "each of" constructions.
- Tense consistency — drift between past and present within a single scene. Almost invisible to the writer, screaming-obvious to readers.
- Dangling modifiers — "Walking down the street, the building caught fire." The building was not walking.
- Confused words — affect / effect, their / there / they're, your / you're, its / it's, lay / lie, lose / loose, then / than, who's / whose.
- Apostrophe errors — possessive versus plural, contractions, the eternal it's/its problem.
What It Won't Touch
The checker respects your voice. It will not rewrite a sentence because it's long. It will not split your comma-chained run-on if the voice calls for breathlessness. It will not change "said" to a fancier dialogue tag. It will not neutralize your cursing, your slang, or your character's regional dialect. Those are choices, not errors.
It also will not fix structural problems. If your pacing is off, if your scene has no conflict, if your dialogue is flat — no grammar checker can help with that. For those problems, use the AI Beta Reader (structural diagnosis) or the AI Slop Scanner (line-level AI tells and filter words).
How To Use It
Step 1: Paste one scene at a time
The free tool handles up to 2,500 words per run — a full scene or a solid chapter, which is the right unit for grammar checking. Don't paste your whole novel in chunks and expect continuity checks across the chunks. That's what the full-manuscript editing services are for.
Step 2: Pick a depth
There are three modes:
- Fix errors only — the lightest touch. Only fixes things that are objectively wrong. Use this for a final polish pass before you send to beta readers.
- Proofread (keep voice) — fixes errors plus a few small awkward phrasings, but preserves your stylistic choices. Use this for a mid-draft cleanup.
- Improve clarity — fixes errors plus rewrites clumsy sentences for flow. Use this when you know a paragraph is ugly but can't figure out why.
Step 3: Copy the fixed version
The result appears below the tool. Hit Copy, paste it back into your manuscript, and compare. Accept the fixes you agree with, reject the ones that step on your voice. The checker is a collaborator, not a boss.
Why Grammar Still Matters in the Age of AI
Here's the thing nobody says out loud: readers don't forgive grammar errors the way they used to. They have infinite free books to choose from. A single typo in your opening chapter is the thing that pushes them to the next sample in their Kindle queue. The bar for basic mechanical correctness has gone up, not down.
And the other thing: your voice is only as strong as your control of the language. If you meant to write "lay" and the sentence actually needs "lie," your voice didn't do what you wanted it to do. Mastering grammar is mastering the thing your voice is built on. The goal isn't to write like a textbook. The goal is to make intentional choices — and you can't make intentional choices about rules you don't know.
Run your chapter through the checker. Look at what it flags. Most of it will be real errors. Some will be the tool misreading your voice — reject those. The ones you keep are the ones that would have pulled a reader out of your story, and now they're gone.
Grammar Check FAQ
Is this really free?
Yes. Free up to 2,500 words a run. No signup, no email, no credit card. If you need more, the editing services handle entire manuscripts.
How is it different from Grammarly?
Grammarly was built for business writing. This was built for fiction. It understands dialogue punctuation, intentional fragments, stylistic rule-breaking, and the difference between an error and a choice. Grammarly will flag your voice. This won't.
Can it check my whole novel?
One scene at a time, free. For the whole novel in one pass, use the full-manuscript editing services — grammar correction plus slop removal, line editing, and continuity checks across every chapter.
Does it work for non-English text?
English only for now. The underlying rules are English-specific, and a grammar checker that tries to handle every language handles none of them well.
What about dialogue punctuation specifically?
Dialogue punctuation is one of the top three errors in self-edited manuscripts, alongside tense drift and confused words. The checker knows that commas go inside quotation marks (American standard), that dialogue tags are lowercase after a question mark or exclamation point, and that an em-dash interrupts mid-sentence while an ellipsis trails off. If your manuscript has consistent dialogue punctuation errors, this will catch all of them in one pass.
Other Tools You'll Want Next
- AI Content Detector — check if a passage reads as AI-generated. Useful before you submit anywhere.
- The Humanizer — rewrite AI-sounding text to sound like an actual human wrote it.
- AI Slop Scanner — finds body-language clichés, filter words, and AI tells a grammar checker misses.
- AI Beta Reader — developmental critique: plot, pacing, character, stakes. The problems grammar can't fix.
- Prose Rewriter — full line-edit pass on your prose. Grammar plus flow, rhythm, and word choice.