Free Grammar Checker — Get Plain-English Fixes
Paste any text and we'll flag grammar, spelling, punctuation, and style issues — each with a one-sentence explanation of why.
Eight categories of writing issues, every check
Beyond spellcheck. Beyond rules-based grammar. Contextual suggestions that understand register, audience, and intent.
Grammar
Subject-verb agreement, tense consistency, pronoun reference, modifier placement, parallelism.
Spelling
Misspellings + the homophones spellcheck misses: their/there, affect/effect, principal/principle.
Punctuation
Comma splices, missing serials, semicolon misuse, apostrophe placement, quote nesting.
Style
Wordiness, passive overuse, weak verbs, redundant adjectives, jargon density, throat-clearing.
Polish your writing in three minutes
Best results when paired with the humanizer + AI detector — but the grammar check is also great as a standalone polish step.
Paste
Drop in your draft — essay, email, blog post, message. Up to 10K characters.
Review
Each suggestion shows the fix and a one-sentence explanation. Learn the rule, not just the patch.
Apply
Update your draft with the fixes that fit your voice. Skip the ones that don't.
How we stack up
Grammarly-class accuracy. ProWritingAid-class style coverage. Without the subscription, the browser extension, or the data retention.
| Feature | TextHumanizer | Grammarly | ProWritingAid | MS Word |
|---|---|---|---|---|
| Free, no account | ✓ 100/mo | Limited tier | 500 words/check | License req'd |
| Grammar + spelling | ✓ | ✓ | ✓ | ✓ |
| Style + clarity | ✓ All registers | ✓ Premium only | ✓ | Basic |
| Explains every fix | ✓ Plain English | Premium only | ✓ | No |
| Tuned for academic register | ✓ | Generic | ✓ | Generic |
| Built-in humanizer + detector | ✓ One workspace | — | — | — |
| Stores your text | Never | May log | Yes | Local only |
Built for everyone who writes seriously
Polish before professors do
Tuned for academic register. Recognizes when passive voice is right (scientific writing) vs. weak (narrative). APA, MLA, Chicago style preferences honored.
Slack, email, doc — same engine
Replace browser spellcheck for any writing that matters. Catches the "their/there" the boss notices, the wordiness HR copies into the handbook.
Improve readability for SEO
Style + clarity flags help you write to a Grade 8 readability target — the Google sweet spot for organic ranking.
How our grammar checker works
Our grammar checker runs on a proprietary engine with a custom rule set tuned for English writing across academic, professional, and casual registers. Each suggestion explains why the change is recommended — not just what to change. That means you learn the underlying rule, not just patch the symptom.
Unlike pure rules-based checkers (Microsoft Word, browser spellcheck), ours catches contextual errors: word-choice problems, subtle subject-verb mismatches, redundant phrasing, awkward voice. Unlike pure AI checkers (Grammarly's premium tier), ours is free and doesn't require an account.
Why explanations matter
Most grammar tools flag mistakes without explaining them. You accept the suggestion, move on, and make the same mistake next week. Our checker writes one or two sentences for each suggestion explaining the rule — so you actually internalize the pattern.
Over time, this changes how you write. Users report fewer flagged issues per draft after 4-6 weeks of use, because they've learned the rules instead of just patching them. The check becomes a tightening pass, not a band-aid.
Frequently asked questions
Run all your text through TextHumanizer.
Humanize · detect · plagiarism scan · grammar check — all in one workspace. 100 free uses/month, no credit card.