GrammarChecker
Free browser-based AI proofreader that corrects grammar, spelling and punctuation, then suggests clearer wording and tone. Works in six languages, needs no account, and checks up to 1,000 words per pass.
What is GrammarChecker?
GrammarChecker is a free, browser-based proofreading tool that corrects grammar, spelling and punctuation with AI. There is no account to create, nothing to install and no paywall: the editor sits directly on the home page, so a visitor can paste text and read corrections within seconds.
The workflow is deliberately narrow. You type or paste text into the editing pane, or upload a document, choose a checking language, then press Grammar Check. Findings appear in a side panel sorted into five categories: grammar, punctuation, word choice, clarity and style. Each suggestion arrives as a card you can accept or ignore on its own, while an Accept all control applies every correction at once. The publisher presents the comments attached to each change as a way to learn the underlying rule rather than merely patch the sentence. Beyond straight correction, the tool advertises generative rewriting and paraphrasing, plus tone suggestions meant to make a message land better.
Six checking languages are supported: English, German, French, Spanish, Portuguese and Italian. The interface itself exists in English, Spanish and Portuguese. Language detection runs automatically and warns you when the text does not match the language you selected, or when the language is not supported at all. One hard limit shapes everything else: 1,000 words per check. Longer text is truncated, so a dissertation has to be fed through in sections.
What surrounds the tool is unusually thin. The entire site is three pages — the home page, a privacy policy and terms of service — with no product, pricing, about or contact page. The publisher is not identified anywhere: no company name beyond the word GrammarChecker, no postal address, no legal notice. The only contact point is a Gmail address declared in the page's structured data. The domain was registered in September 2025 and first archived weeks later, so this is a very young service. Headline claims of 1M+ users and a 4.9 out of 5 rating are self-declared and cannot be verified.
What it does
- Correct grammar, spelling and punctuation across a whole text in one click
- Review each suggestion individually and accept or ignore it
- Rewrite and paraphrase passages with generative AI
- Rephrase sentences for clarity and concision
- Adjust the tone of a message
- Check text in English, German, French, Spanish, Portuguese or Italian
- Upload a document instead of pasting text
When to use GrammarChecker / When not to
A quick filter to help you decide if GrammarChecker is the right fit.
When to use GrammarChecker
- Students and academics polishing essays, dissertations, reports and journal manuscripts before submission
- Non-native English speakers who want each correction explained rather than silently applied
- Office workers and assistants tidying business emails, memos and internal documents
- Job seekers sharpening the wording of a CV, cover letter or LinkedIn summary
- Bloggers, copywriters and social media managers cleaning up short marketing copy
When not to use GrammarChecker
- Anyone proofreading long-form work in one go: text is truncated at 1,000 words per check
- Teams needing a contractual data framework, since no DPA, subprocessor list or GDPR commitment is published
- Lawyers, clinicians and others handling confidential or privileged material that must not be pasted into an anonymous service
- Developers wanting to automate checks, as there is no API, browser extension or mobile app
- Writers working outside the six supported languages, who are shown a not-supported notice
How to use GrammarChecker
A typical end-to-end flow, from setup to results.
- Open grammarchecker.cc; the editor is on the home page, with no sign-up step
- Paste or type your text into the editing pane
- Alternatively, use "upload document" to submit a file, or "insert example" to try the tool on sample text
- Select your checking language from the six available; English is preselected
- Watch the word counter and keep the passage under the 1,000-word ceiling
- Click "Grammar Check" to run the analysis
- Read the findings in the Check Results panel, grouped as grammar, punctuation, word choice, clarity or style
- Accept or ignore each suggestion, or apply everything at once with "Accept all"
- Copy the corrected text with the Copy button
- Use Delete to clear the pane before checking the next section
Pros & Cons
Pros
- Genuinely free, with no account, no installation and no paywall
- The publisher states there are no in-product ads and that personal data will never be sold
- Usable within seconds: the editor is the home page
- Explains each correction, which helps non-native writers learn rather than just patch
- Six checking languages with automatic detection
- Errors are typed and can be applied one by one or all at once
- Accepts an uploaded document rather than only pasted text
Cons
- Hard ceiling of 1,000 words per check makes long documents awkward
- The publisher is entirely anonymous: no company name, address, legal notice or contact page
- Support runs through a generic Gmail address that appears only in the page's structured data
- The privacy policy is boilerplate borrowed from an advertising analytics service and never mentions the text you submit
- It refers readers to a "section 11" for contact details that does not exist in the document
- No GDPR claim, no DPA, no subprocessor list and no training opt-out
- No API, browser extension or mobile app, and no third-party integrations
Pricing & Plans
The tool is free of charge in its entirety. There is no paid tier, no trial mechanism and no published price: the structured data on the home page declares an offer at 0 USD, the site has no pricing page, and no sign-up, subscription or payment path exists anywhere in the interface. The publisher also states that the product carries no in-product advertising. Note, however, that the terms of service describe subscriptions, automatic renewal and a 24-hour refund window — template clauses with no counterpart on the site today, but a sign that a paid tier could be introduced.
- Free — unlimited use of the grammar checker at no cost
- capped at 1
- 000 words per check
- with no account required
Data, GDPR & hosting
A consolidated view of how GrammarChecker handles your data.
GDPR overview
There is effectively no GDPR implementation on display. The acronym GDPR does not appear anywhere on the site, and the privacy policy grounds itself in Directive 95/46/EC, the instrument the GDPR repealed in 2018, together with the 2003 UK e-privacy regulations. Section 9 does grant residents of the European Union and Australia rights of access and correction plus an opt-out from marketing, but it warns that access requests may attract statutory processing fees, and it directs readers to the contact details "in section 11 below" — a section that does not exist, the document ending at section 10. No Article 27 EU representative, no data protection officer, no data processing agreement and no subprocessor list are published. In practice there is no documented route to exercise a data subject right.
Who owns the data?
Neither the terms of service nor the privacy policy says who owns the text you submit for checking. The question is simply never addressed: the privacy policy describes advertising and analytics data collected about visitors, and the terms grant you a limited licence to view the site's own materials. The only ownership clause concerns content you post in public areas of the site, for which you are declared fully responsible and which the publisher and third parties may use without limitation. For the text you paste into the checker itself, no licence is claimed and none is disclaimed. Treat that silence as an unresolved risk rather than as an implicit guarantee.
Reuse rights
The terms say nothing about reusing the corrected text the tool gives back, so nothing restricts you from using your own output freely: no licence is claimed over it and no attribution is demanded. The restrictions that do exist point the other way, at the site's own content. Section 3 grants only a temporary licence to download a single copy of the site's materials for personal, non-commercial, transitory viewing, and expressly forbids reproducing them, using them commercially, displaying them publicly, reverse engineering the software, removing proprietary notices or transferring them to another server. Content you post in public areas of the site is treated differently again: you are solely responsible for it, and the publisher states it may be collected, used and disclosed by the publisher or third parties without limitation.
Data retention & training
Hosting summary
Hosting is described only in the vaguest terms. The privacy policy states that collected information is typically stored on servers in the United States or other international territories, and that personal data may be transferred to the publisher's systems, third-party processors or affiliated companies located in various countries worldwide. No specific country beyond the United States is named, no region is identified, and no transfer mechanism — standard contractual clauses, an adequacy decision or any equivalent — is cited. The policy acknowledges that other jurisdictions may apply weaker data protection standards than the reader's own, and offers only a general commitment to maintain appropriate safeguards. Security is described generically, through firewalls and secure data centres, with no certification such as SOC 2 or ISO 27001 claimed. The site is served through Cloudflare, whose anycast address says nothing about where processing actually takes place. In short, treat United States hosting as the working assumption and everything beyond it as undetermined.
Things to keep in mind
Risks and trade-offs to weigh before adopting GrammarChecker.
- Anonymous publisher: with no company name, address or legal notice, you have no identifiable party to hold accountable if something goes wrong
- The privacy policy is boilerplate from an advertising analytics service and never covers the text you submit, so its assurances may not describe what actually happens to your writing
- No documented way to exercise a data right: the policy points to a contact section that does not exist in the document
- Pasting personal, confidential or privileged material into an unidentified service can breach your own duties of confidentiality at work
- Leaning on one-click correction can erode your own command of grammar over time, especially for learners who accept every suggestion without reading the explanation
- AI suggestions can flatten voice, and rewriting an academic passage may edge into territory your institution treats as inappropriate assistance
- Free with no business model on display, no named owner and template terms mentioning subscriptions: the service could add charges, change hands or disappear without notice
Setup & Integrations
Technical difficulty
None. There is nothing to set up: no account, no installation, no configuration and no API key. The checker is embedded in the home page, so the entire process is opening the site, pasting text, choosing a language and clicking a button. Anyone able to use a web browser can run a check within seconds. The only practical constraint is remembering the 1,000-word ceiling and splitting longer documents accordingly.
Deployment
Supported languages
Behind GrammarChecker
Resources
All the official URLs gathered for verification and reference.
Alternatives
Tools that compete with or complement GrammarChecker.
Frequently asked questions
Is GrammarChecker really free?
Do I need to create an account?
How much text can I check at once?
Which languages does it check?
What kinds of errors does it find?
Can I upload a document instead of pasting text?
Is my text used to train AI models?
Is there an API, a browser extension or a mobile app?
Who runs GrammarChecker?
Is it safe for confidential documents?
Should you pick GrammarChecker?
GrammarChecker does one thing and removes almost every obstacle to doing it. There is no account, no install and no payment: you land on the page, paste a paragraph, and get typed, commented corrections in seconds, in any of six languages. For a student tidying an essay, a non-native speaker who wants the rule explained, or an assistant cleaning up an email before sending it, that friction-free path is a real advantage, and the explanatory comments make it more useful than a silent autocorrect.
The reservations are about the publisher, not the tool. Nobody is named anywhere: no company, no address, no legal notice, no contact page, and a Gmail address buried in the page's structured data as the only way to reach anyone. The privacy policy is visibly a template lifted from an advertising analytics business — it discusses advertiser "Clients" and ad targeting, and never once addresses the text you paste into the checker. It points to a section 11 for contact details that the document does not contain, cites a European directive repealed in 2018, never mentions the GDPR, and states no retention period. The terms, meanwhile, describe subscriptions and refunds for a product that is entirely free. Two social accounts the site advertises do not exist. The audience and rating figures are self-declared.
The practical rule follows from that gap. Use it freely for schoolwork, blog drafts, marketing copy and everyday correspondence, where the worst case is a clumsy suggestion. Do not paste anything confidential, personal or privileged into it, and do not rely on it where a documented data commitment matters — that commitment simply is not there. Watch the 1,000-word ceiling, and treat the output as a draft to review, not a verdict to accept.
- Choosing a selection results in a full page refresh.
- Opens in a new window.