AI Spell Checker & Grammar Checker
An AI proofreader that reads your text sentence by sentence and corrects what a word list cannot: a wrong word spelled right, a slip in grammar, a missing comma.
- No account needed to try it
- Reads whole sentences
- Word, PDF and more, in and out
Check whole documents in your workspace
Add a document to your workspace, check it there and download the corrected copy in the format you need, next to all your other apps.
AI proofreading that understands every sentence
It reads the whole sentence
A spelling check compares each word with a dictionary, so their for there or form for from slips through: both are real words. The AI Spell Checker reads the whole sentence and corrects the word that does not fit it, along with spelling, grammar and punctuation.
Every correction is underlined in your text with the word to put in its place. Nothing changes until you apply it.
Open a document or paste your text
Add a Word (DOC or DOCX), OpenDocument, RTF, PDF, text, HTML, Markdown or EPUB file from your device, a link or your cloud, or type your text in. A scanned page is read with text recognition first, and the AI checks its words like any other.
Your Word document keeps its formatting
Download a Word or OpenDocument file in its own format and your fixes are written into the original: its headings, tables, pictures and styles stay exactly as they were, and only the words you corrected change.
Download in the format you need
Save the corrected text as a Word, PDF, OpenDocument, RTF, text, HTML or Markdown file, or copy it with one click. A PDF comes back as a new, clean PDF of your corrected text.
Traditional spell checker or AI spell checker?
Both check spelling, grammar and punctuation. Here is what each one does best.
| Online Spell Checker | AI Spell Checker & Grammar Checker | |
|---|---|---|
| Spelling, grammar and punctuation | ✓ | ✓ |
| A wrong word that is spelled right | Common pairs | ✓ |
| An explanation for each mistake | ✓ | — |
| Style suggestions (Picky mode) | ✓ | — |
| Your own dictionary | ✓ | ✓ |
| Word, PDF and more, in and out | ✓ | ✓ |
| Free use | Free | Limited |
Many writers run the free Spell Checker first and the AI Spell Checker on the texts that matter most.
How to proofread your text with AI
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Add your text
Type or paste your text, or open a Word, OpenDocument, RTF, PDF, text, HTML or Markdown document.
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Check with AI
Choose the language and press Check with AI. The AI reads your text and underlines every correction it suggests.
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Review and apply
Read each suggestion and apply the ones you agree with in one click. Ignore the rest.
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Download it
Save the corrected text as Word, PDF, OpenDocument, RTF, text, HTML or Markdown, or copy it with one click.
AI spell checker FAQ
What does the AI Spell Checker find that a spell checker does not?
Words that are spelled right but wrong in their sentence, such as their for there or form for from, along with spelling, grammar and punctuation. It reads the whole sentence instead of comparing single words with a dictionary.
Can the AI make mistakes?
Yes. An AI model can suggest a change you do not want or miss a mistake. That is why nothing changes in your text until you apply a suggestion yourself.
Is the AI Spell Checker free?
You can try it without an account. An AI model costs more to run than a rule-based check, so its free use is limited; the Spell Checker stays free.
Will my Word document keep its formatting?
Yes. Download a Word or OpenDocument file in its own format and your fixes are written into the original document: its headings, tables, pictures and styles stay as they were. Every other format is written as a new, clean document.
What happens to my text?
It travels over an encrypted connection to be checked automatically, with nobody reading it, and it is not shared with third parties. The words in your dictionary stay in your browser.
From the blog
Spell checker vs AI spell checker: which should you use?
Compare a rule-based spell checker with an AI spell checker. See what each catches, where they miss, and when to use which for better writing. Learn more.
Read articleA proofreading checklist before you hit send
Use this proofreading checklist for emails, applications and documents. Check words, sentences, facts, format and final details before you send. Read it now.
Read articleTen common grammar mistakes a grammar checker finds
Its vs it's, then vs than, a vs an, and more. See 10 common grammar mistakes a checker spots, with examples and fixes to improve your text. Read now.
Read articleKnowledge Base
Writing terms and document formats, explained
Why their, there and they're slip past a spelling check, and how to tell them apart.
Walking to work, the rain started: phrases that describe the wrong thing.
Fused sentences and comma splices, and why a long sentence is not a run-on.
Your final check before you send: tips and checklists to catch what you might miss.
When to use the passive voice and how to change a sentence to active.
Word's format: a ZIP of XML files. Checked and downloaded with formatting preserved.