Is there an AI for fixing my grammar?

Fix my grammar without losing my voice

There are two ways to do it, and they go wrong differently. A checker underlines each error where you type and you accept or dismiss it one at a time, so nothing changes without your say. A chatbot takes the whole paragraph and hands back a new one. That is faster and catches more, but a 2023 test of an early chatbot found it over-corrects, rewriting phrasing and structure that were never wrong.

If you use a chatbot, ask for errors only plus a list of every change, and read the list against your original. Our checker vs chatbot comparison has a prompt that does exactly that. For anything longer than an email, a checker is less work: you review ten underlines instead of rereading a rewritten page.

Free AI grammar checker: what the free tiers cover

Spelling, punctuation and everyday grammar are free on every tool listed here, and that covers the mistakes that would actually embarrass you. What free plans hold back is the AI layer: whole-sentence rewrites, tone changes, plagiarism checks and the deeper style pass. Where a free plan includes AI rewrites at all, it rations them, by the day or by the month.

The other limit is length. Several free tiers cap how much text one check takes, some at 2,000 characters or less, so a long essay goes in pieces. What the first pick's free plan includes has its own page.

Grammar checker with no AI: the rule-based kind still exists

Rule-based checkers match each sentence against a long list of written grammar rules. No language model reads your draft, nothing gets rewritten, and the best of them run entirely on your own machine, so the text never leaves it. If privacy or a no-AI rule is why you are asking, this is the kind you want.

The trade-off is coverage: a rule engine misses errors nobody wrote a rule for, and it never rewords. The no-AI pick above checks English only. For other languages, the open-source engine above can be self-hosted, and there only its rule-based core runs. Also check the default on what you use now: at least one big AI checker trains on free users' text until you switch it off. More picks are on our alternatives page.

Grammar checker for Spanish and other languages

Spanish is well covered, and so are French, German, Portuguese and Italian. On the first pick in the list, spelling and basic grammar work in more than twenty languages for free, while clarity, tone and rewrites cover six, Spanish included, and free users get three of those suggestions a day. The open-source pick covers thirty-plus languages, and one rewriting tool in the list works in nine, including Japanese, Korean and Chinese.

Two cautions. Some checkers do not tell regional variants apart, so Mexican and Castilian Spanish get the same rules; if it matters, tell a chatbot which one you mean. And in a language you are still learning, pick a tool that explains each fix, because a silent rewrite teaches you nothing.

fixing my grammar: quick answers

How do I check the grammar of a sentence?

Paste it into any checker in the list; one sentence fits inside every free tier. If something is flagged and you cannot see why, ask a chatbot to name the rule the sentence breaks. Knowing the rule is what stops the same mistake turning up next week.

Is there a free grammar checker online?

Yes. Several of the picks above work in a browser tab with nothing to install, and one needs no account at all. Paste-in sites send your text to their servers to check it, so leave out anything confidential, and expect a cap on how much you can check at once.

Can an AI sentence checker fix sentence structure?

Yes. Run-ons, fragments and sentences that are correct but hard to follow are what the AI layer is for: it suggests a split, a reorder or a full rewrite. On free plans that whole-sentence rewrite is usually the rationed or paid part. Accept these one at a time, because a restructured sentence is where your meaning can quietly shift.

Is a grammar checker AI?

Most are now: the big ones run language models alongside or instead of their old rule sets, though rule-based checkers with no model still exist. Whether using one counts as using AI is your school's or employer's call, so ask first. One detector maker said its own tests showed plain grammar fixes did not set it off, while another warns that its one-click fix can raise the AI score. More on how reliable AI detectors are.