Grammar Checker Free Online Tool

You wrote the email twice and still are not sure about "its" versus "it's". A grammar checker catches the obvious mistakes before someone else does. This page sends your text through an AI editor that flags spelling errors, punctuation slips, and awkward sentences, then shows a corrected version you can copy.

It is built for quick passes: a client update, an essay paragraph, a LinkedIn post you are about to publish. You pick the check type (grammar and spelling, punctuation, style, or a full pass), choose a language, and optionally ask for explanations of each fix.

The check runs through Mopailor's AI worker. Your text leaves the browser for processing. Do not paste passwords, medical records, or unpublished legal drafts you would not send to a contractor.

• AI can miss context. Commas change meaning; the tool may suggest a grammatically fine sentence that says the wrong thing.

• This is not a replacement for a professional proofreader on contracts, theses, or published books.

• UK versus US spelling conventions differ. The model may 'correct' colour to color unless you pick the right language and still re read.

• Homophones (their/there/they're) slip through when the wrong word is still a valid word.

• Work emails before you hit send on something important to a client or your manager.

• College essays and cover letters where small errors undercut an otherwise strong application.

• Social posts and captions where typos are public and hard to take back.

• ESL writers who want a second pass on articles, forum posts, or documentation in English.

• Blog drafts: run a section after you write it, not only at the end when you are tired.

• Read the corrected text out loud. Your ear catches what the model missed.

• For long documents, check one section at a time so explanations stay tied to the right sentences.

• If a fix looks wrong, keep your original. AI prefers standard patterns and can flatten your voice.

• Turn explanations on when you are learning; turn them off when you just need speed.

• Pair with the Word Counter if you are trimming to a limit after you fix grammar.