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Free grammar checker. Fix your writing instantly.

Paste your text and get it back corrected: grammar, spelling, punctuation and capitalization, with every change highlighted. Your wording and tone stay yours.

0 words

Fix grammar in every app, not just this page.

In the Voicera app for Mac, select text anywhere and press one shortcut. Or just speak, and clean text appears at your cursor. Free to start.

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How it works

Three steps. No account.

  1. 1

    Paste your text

    Up to 3,000 characters: an email, a message, an essay paragraph or a post.

  2. 2

    Check grammar

    The AI proofreader corrects mistakes only. It does not reword sentences that are already right.

  3. 3

    Review and copy

    Changes are highlighted so you can learn from them. Copy the clean version in one click.

  • Grammar

    Subject and verb agreement, tenses, articles, plurals and missing or wrong words.

  • Spelling

    Typos and commonly confused words such as their, there and they're.

  • Punctuation

    Missing commas and periods, run on sentences, apostrophes and capital letters.

  • Your voice kept

    No rewriting for style. Slang, abbreviations and emoji you meant stay as they are.

A grammar checker that corrects, not rewrites

Many online grammar checkers rewrite whole sentences, and the result stops sounding like you. Voicera's free grammar checker works like a careful proofreader: it fixes spelling, grammar, punctuation and capitalization, and leaves every sentence that is already correct exactly as it is.

Every correction is highlighted, with removed words struck through and added words marked, so you can see what changed and why. That makes it useful for English grammar correction and for learning: you spot the mistakes you make most often.

When you want more than corrections

If your text is correct but sounds stiff or awkward, try the free AI text rewriter to make it sound natural, professional or casual. To say the same thing in new words, use the paraphrasing tool. Writing in another language? The text translator gives natural English, not word for word output.

Prefer to talk? Speech to text turns your voice into punctuated text with the filler words removed.

Voicera is an AI writing assistant for Mac that turns your voice into finished writing and fixes, rewrites and translates text in any app. See plans and pricing, or browse all free writing tools.

FAQ

Questions, answered.

Is this grammar checker really free?

Yes. There is no account, no email and no card. Paste your text and get the result on this page. Each visitor can run a handful of checks a minute, which is plenty for normal use.

Can I check grammar online without signing up?

Yes. Paste your text into the box, press Check grammar and the corrected text appears right below it, with each change highlighted.

Does it fix spelling and punctuation too?

Yes. It corrects grammar, spelling, punctuation, capitalization and missing or wrong words, while keeping your meaning, wording and tone.

Will it change my writing style?

No. It corrects mistakes only. It does not reword, reorder or change the tone, and it keeps informal words you chose on purpose. To restyle a text, use the AI text rewriter instead.

Can I use it to improve my English?

Yes. The highlighted corrections show what was wrong in each sentence, so you can learn the patterns. It works for other languages too: the text stays in the language you wrote it in.

Do you keep what I paste?

No. Your text is sent to our AI provider only to produce the result and is not stored or used to train models. Read the details in our Privacy Policy.

How can I check grammar in any app, without copying and pasting?

Use Voicera for Mac. Select text in Mail, Slack, Google Docs or any other app, press Fn + Shift and pick a Quick Action: the result shows as a preview and replaces your text only when you click Insert. You can also dictate with Fn and get clean, punctuated text at your cursor. It is free to start.

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