Free AI Grammar Checker

No. You can use the tool without creating an account.

To use the Tomedes Grammar Checker, paste your text into the input box and click the button to run the check. The tool automatically detects the language of your text, runs the SMART multi-engine grammar check, and then highlights errors and suggestions directly in your text so you can review, accept, or ignore each change before you finalize your document.

SMART is the multi-source AI feature that makes the Tomedes Grammar Checker unique and more advanced. Instead of relying on just one AI model, SMART sends your text to several leading AI sources at the same time. Each AI suggests its own corrections, and SMART compares these options sentence by sentence to decide which version is the strongest. The result is a single, combined, grammar-checked version of your text that draws on the best suggestions from multiple AI sources.

SMART's multi-source approach gives you more accurate and trustworthy results than using a single AI. By comparing suggestions from several top grammar checkers, SMART can catch more errors, avoid weak or awkward fixes, and choose corrections that fit the context and tone of your text. It also helps produce more natural-sounding sentences across many languages, reduces the risk of blind spots, and gives you a cleaner, more polished draft with fewer manual edits.

The grammar checker supports more than 100 languages and key dialects. You can check text in English, Spanish, French, German, Italian, Portuguese, Arabic, Chinese, Japanese, Korean, Russian, and many other languages used by Tomedes’ global linguist network. The list of supported languages and dialects will continue to grow as more language models are added.

Yes. You can run separate checks for each language by changing the language selector before you click “Check Grammar.” This is helpful if you work with multilingual content or compare translation drafts.

Tomedes treats your content with care. The tool runs on secure infrastructure, and your text is not used to identify you or sold to third parties. For highly sensitive or regulated documents, you can also request dedicated translation and editing workflows under stricter NDAs and data-processing agreements.

Yes, you can upload many common file types to check grammar without copying and pasting everything manually. The Tomedes Grammar Checker supports formats like PDF, DOCX, DOC, TXT, PPTX, HTML, SRT, and CSV, making it easy to review reports, academic papers, presentations, website content, subtitles, and other professional documents. After you upload your file, the tool runs the same grammar, spelling, and punctuation checks and then shows clear suggestions you can review before finalizing your text.

Yes. The grammar checker is very helpful for non-native speakers. It catches common errors, suggests more natural phrasing, and explains why a change is better. This makes it easier to learn from every edit and build confidence in English or any supported language.

No. AI grammar checking is a powerful first step, but it is not a full replacement for professional human editors or translators. Use the tool to clean up drafts and catch obvious errors, then rely on Tomedes linguists for critical documents, localization projects, or specialized content where nuance and context really matter. Contact us for professional proofreading and editing services.

Yes. If your document is highly specialized or requires a professional touch, you can request professional human review and post-editing from Tomedes linguists. Use the grammar checker first to clean up your draft, then submit the file for expert editing or translation review so a human specialist can refine tone, terminology, and style before you publish or send it.