About the Grammar Checker
Tezmy's Grammar Checker proofreads your text and gives it back corrected: spelling mistakes, wrong verb forms, missing words, punctuation and capital letters are fixed, while your own wording, meaning and tone are kept. There are no long explanations to read. You get the clean text ready to copy, plus a view that highlights each change, so you can see what was wrong and learn from it. It suits emails, job applications, school work, social posts and messages. The checking is done by an open AI model on our server; your text is not stored.
Updated October 2026
How to use the Grammar Checker
- 1Paste or type your text (up to 1,500 characters).
- 2Press Check grammar.
- 3Read the corrected text. Use Show changes to see each correction highlighted.
- 4Copy the corrected text into your email, document or post.
When a quick grammar check helps most
- Before sending a job application, cover letter or email to a manager or client.
- On school and college assignments, after you have finished writing.
- For social media posts and business messages, where small mistakes are very visible.
- When English isn't your first language and you want to be sure a message reads well.
Getting the best results
- Check a few paragraphs at a time; long texts can be split into parts.
- Write your full sentences first, then check, rather than checking half-finished notes.
- Look through Show changes: if a correction changes your meaning, keep your original words.
- For names, brands and special terms, make sure they weren't “corrected”.
- Want a different tone as well? After checking, use the Paraphrasing Tool with the Formal or Simple style.
Common mistakes it catches
Everyday writing slips are the most common: their/there/they're, its/it's, missing commas before a name (“Thanks John” becomes “Thanks, John”), wrong tense after “did” (“did you went” becomes “did you go”), and missing articles (“I am student” becomes “I am a student”). It also fixes capital letters at the start of sentences and for names, and double spaces. Seeing these changes highlighted a few times makes them much easier to avoid next time.
On your phone or computer
On a phone, write your message as usual, copy it, paste it here and tap Check grammar, then copy the corrected text back. On a computer, you can keep this page open in a tab while you work and check each paragraph before it goes out. For a full email use the AI Email Writer, and count words afterwards with the Word Counter.
Features
- Fixes spelling, grammar, punctuation and capitals
- Keeps your wording and meaning
- Highlights every change
- Counts how many corrections were made
- One-tap copy of the clean text
- Free, no account, up to 30 checks a day
Frequently asked questions
Is this grammar checker free?
Yes, with no sign-up and no premium version. You can check up to 30 texts a day (shared with our other AI tools), which is plenty for everyday writing.
What kinds of mistakes does it fix?
Spelling, typos, verb tenses, subject–verb agreement, missing or wrong articles (a, an, the), prepositions, plurals, punctuation and capital letters. It tries to change as little as possible, so your style stays yours.
How do I see what was changed?
After checking, the result shows how many changes were made. Show changes marks removed words with a line through them and added words in colour. Hide changes shows just the clean text.
Does it explain the grammar rules?
No, it only returns the corrected text. The highlighted changes let you compare your version with the fixed one, which is often the quickest way to spot your common mistakes.
Is it always right?
It catches most everyday mistakes, but AI can occasionally miss an error or change a word you meant, such as a name or a technical term. Read the corrected text before you send anything important.
Does it work for British and American English?
It generally keeps the spelling style you already use, such as colour or color. If your text mixes both, it may pick one; check the highlighted changes.
Is my text kept private?
Your text is sent to our AI service only to correct it. We don't store it or use it for anything else. Still, avoid pasting passwords or highly sensitive details into online tools.