This grammar checker asks an AI language model to review your text for grammar, spelling, punctuation and style problems, then lists each problem as a card with the original wording, a suggested fix and a short explanation. Below the cards is a corrected copy of the whole text with a Copy Corrected Text button. Pressing Check Grammar sends your text to this site's server, which passes it to an outside AI provider and returns the reply, so the text leaves your browser.
How to use the grammar checker
- Paste or type your text into the Text to Check box. The counter under it shows the number of words.
- Keep the text under 1,634 characters, roughly 250 to 300 words. Longer text is rejected rather than shortened.
- Press Check Grammar. The button shows Checking while the model works, which usually takes a few seconds.
- Read the Grammar Score and the issue cards, and decide on each suggestion yourself.
- Press Copy Corrected Text to take the full corrected version, or copy only the fixes you agree with into your own draft.
What the results show
Each card carries a coloured label for the kind of problem the model found: Grammar, Spelling, Punctuation or Style. Under the label you see the original wording, the suggested replacement and a sentence on why it was flagged. The score above the cards is chosen by the model, shown in green at 80 or more, amber from 60 to 79 and red below 60. A score of 100 with no issues shows "Perfect! No issues found."
Punctuation problems include a comma splice, a missing comma after an introductory phrase or a stray apostrophe in a plural, and the model reports the ones it finds under the Punctuation label. Style cards are suggestions, such as a wordy phrase or a repeated word, and you can ignore them when the original says what you mean.
Example check
Input:
Their going to the libary tomorow, and they has three book to return.Below is a plain-text sketch of the result. The model writes the real score, issue list and explanations, and they can differ between runs.
Score: 40
Spelling libary -> library
Spelling tomorow -> tomorrow
Grammar Their going -> They're going
Grammar they has -> they have
Grammar three book -> three books
Corrected text:
They're going to the library tomorrow, and they have three books to return.What this free grammar checker suits
The size limit suits short pieces such as an email, a cover letter paragraph, a product description or a social media post. People writing in a second language can read the explanations to see why each change was suggested. For a longer document, check one section at a time.
A grammar check is one pass of editing. For the next pass, the readability score checker measures sentence length and reading level with fixed formulas instead of AI, and the guide on editing AI content so it sounds human covers the patterns a grammar tool won't flag. If you are writing an email from scratch, the AI email writer drafts one for you to check here. More free writing tools are listed in the writing category.
Length, rate and accuracy limits
- Your text can be at most 1,634 characters, counting spaces and line breaks. The server caps each request at 2,000 characters and the instructions the tool sends with your text use the other 366. The counter under the box shows words, so the word counter is handy for checking the character total first.
- Each IP address gets 5 AI requests per minute, shared with the other AI tools on this site.
- The score and suggestions come entirely from the model. No grammar rules run in the site's code, so the model can miss an error or flag a sentence that was already correct.
- The model runs with a temperature of 0.7 and the server switches provider if one fails, so the same text can get a different score on a second check.
- The instructions sent with your text are in English and do not name a language. Text in Spanish or another language may still get useful corrections, but that depends on the model, and the explanations may come back in English.
