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Free AI Grammar Checker

Paste your text and get the corrected version back. It reads the sentence for meaning before it changes anything, so it catches the errors a rules-based checker walks straight past, including the word that is spelled correctly and still wrong.

Check my grammar

1,100+

people have a Paragraph Generator account

3,500+

tool runs since our September 2026 relaunch

languages, all free on every plan

What it checks

Run a full check, or narrow it to the one category you know you have a problem with.

Category	What gets corrected
Grammar	Subject and verb agreement, tense, articles and pronoun use
Spelling	Typos, and the wrong word spelled perfectly correctly
Punctuation	End marks, apostrophes, semicolons and quotation marks
Commas	Splices, missing serial commas and clauses left unseparated
Capitalization	Sentence starts, proper nouns, titles and headings
Spacing	Doubled spaces, and the missing one after a full stop
Prepositions	The small words native speakers get right by ear and nobody else does
Word choice	The near synonym that does not quite mean what you meant
Sentence structure	Fragments, run-ons and clauses in an order that fights the reader
Tone	Wording that reads sharper or looser than you intended it to

The word that is spelled right and still wrong

A good share of what a check catches is not a typo at all. It is the correctly spelled word that does not belong in the sentence: affect where you wanted effect, its for it’s, enquiry where the meaning called for inquiry. A spellchecker signs those off because every letter is in place. A grammar check online free to run reads the sentence for meaning instead, which is how the word that is spelled right and still wrong gets caught here.

If confusable pairs are the thing that keeps tripping you up, the rundown on Enquiry vs Inquiry and other confusable words walks through the ones that catch people out most often. Sort the word out there, then paste the sentence back here for a final pass.

Check in the language you are writing in

Set the language in the tool before you run the check. The corrections come back in that language, with its own spelling and punctuation conventions, and nothing gets quietly translated into English on the way through.

All 21 languages in the menu are open to everyone, on every plan and signed in or not: English, Spanish, French, German, Italian, Portuguese, Dutch, Russian, Japanese, Korean, Chinese (Simplified), Arabic, Hindi, Turkish, Polish, Swedish, Greek, Hebrew, Indonesian, Vietnamese and Thai. None of them is locked.

If you write in a second language, this is where a check earns its keep. Articles, prepositions and comma placement are the rules a native speaker applies by ear and everyone else has to look up, and they are exactly what a sentence-level pass is good at. What it will not tell you is that a phrase is correct and still not what anyone would actually say. That judgement is a person’s.

How to use it

Paste, check, copy

01
Paste your text
Drop in the sentence, paragraph or document section you want checked.
02
Choose what to check
Run a full check for a general clean-up, or pick a single category when you already know what keeps going wrong.
03
Copy the corrected text
Read the corrected version, keep the changes you agree with, and copy it back into your document.

Who it helps

For the pass before the one that counts

Mechanical errors are the cheapest kind to fix and the most expensive kind to leave in.

Students

Catch the errors that quietly cost marks, before the essay is handed in rather than after.

Writers in a second language

Get the articles and prepositions right without having to ask a colleague to read it over again.

Marketers

One typo in a subject line reaches the entire list at the same time. Check it before it sends.

Professionals

Send the message knowing that the punctuation is not the part doing the talking.

Writers and bloggers

Clear the mechanical problems first so the real edit can be about the argument.

AI drafts

Generated copy still slips on agreement and punctuation. Run it through before it goes live.

Try it for. the page you are about to publish and have read six times

How it compares to Grammarly and QuillBot

Those two are what people usually weigh this against. Both are larger products built around a different job, so the useful comparison is about fit rather than a scoreboard.

What you are weighing	This checker	Grammarly	QuillBot
Getting started	Paste and run. No account, nothing to install.	An account first, and usually the extension.	An account for anything past the basics.
Where it runs	On this page, in any browser.	Extension, desktop app and document add-ins.	Its own editor, plus an extension.
What it is built for	One corrective pass over the passage you paste.	Writing help that follows you across every app.	Paraphrasing, with a checker alongside it.
What you get back	The corrected text, ready to copy out.	Suggestions you accept one at a time.	Suggestions inside its own editor.
How much at once	Around 250 words per run.	Whole documents.	Longer passages, with limits by tier.
Languages	English plus twelve more in the menu.	Built around English.	Several languages.
Cost to try it	A free allowance that refills daily, no card.	A free tier, paid for the deeper checks.	A free tier, paid for the deeper checks.
What sits next to it	Generator, rewriter, expander, summarizer, humanizer, chat.	Assistant features wrapped around your writing.	Paraphraser, summarizer and study tools.

When a fix is not the thing you need

A checker corrects what is already on the page. It will not write the paragraph that is missing, and it will not make a stiff sentence worth reading. Those are separate jobs, and each one has its own tool here.

If the words do not exist yet, start in the paragraph generator and bring the draft back here afterwards. If a sentence is grammatically sound and still clumsy, the paragraph rewriter changes the wording instead of repairing it. A thin section grows in the paragraph expander, and an overlong one comes down in the paragraph summarizer. Run the grammar check last, once the words have stopped moving.

Other tools

The rest of the writing kit

Every tool here runs on the same free allowance, so a draft can move between them without you paying twice.

AI Paragraph Generator

Turn a topic line into finished paragraphs, a blog post or product copy.

AI Paragraph Rewriter

Say the same thing in different words when the wording, not the grammar, is the problem.

Paragraph Expander

Build a one-line note into a full paragraph with reasons, examples and transitions.

Paragraph Summarizer

Cut an article, a report or a page of notes down to the points that matter.

AI Humanizer

Rewrite a flat AI draft so it reads like something a person actually wrote.

AI Chat

Ask a question or think an idea through before you commit it to a draft.

ChatGPT Free Online

The same chat with no login, for the quick question you do not want an account for.

ChatPDF

Upload a document and ask it questions instead of reading all of it.

Grammar checker FAQ

Yes, and there is no signup to use it. Every visitor gets a free allowance that refills every 24 hours. A free account raises the allowance, and a paid plan gives you about 16 to 19 times the free daily allowance. The checker and all 21 of its languages are free on every plan.

It fixes. Grammar, spelling, punctuation and clarity get corrected and your wording stays yours, unless a sentence genuinely cannot be repaired without being rebuilt. If you want the wording changed on purpose, use the paragraph rewriter instead.

That is exactly what it is built for. Paste the passage, run the check and copy the corrected text back out, with no document to upload and no menus to learn. When you want more than a fix later on, whether that is different wording, a longer or shorter version or a more human tone, the rewriter, expander, summarizer and humanizer sit one tab over on the same free allowance.

Not yet. The current version returns the corrected text so you can compare it against your original. A change-by-change breakdown with explanations is planned work, not something the tool does today.

Yes, as long as you work a short passage at a time. Check a paragraph, read the corrected version against what you wrote, and look for the change rather than just accepting it. The same tense, the same missing article, the same comma turning up run after run is your own pattern, and once you have seen it three times you stop making it. Pasting in a whole document hides exactly that, because too much moves at once for anything to stand out. That is what makes it a useful grammar checker for non-native writers: the articles, prepositions and commas you would otherwise have to look up turn into a pattern you can see, and then stop repeating.

English, plus the other languages listed in the tool. Pick your language before you run the check. If a language is not in that list, the check is not tuned for it and you should not rely on the result.

Around 250 words per run. For a full document, check it a section at a time, which is also how you avoid skim-reading your own corrections.

No. It is reliable on mechanical errors, which is most of what a proofreading pass catches. Judgement calls about meaning, structure and whether the argument holds are still yours to make.

Check it before anyone else does

Paste your text and get the corrected version back in seconds. No signup, and a free allowance that refills every day.