Blindspot

Blindspot is an AI English writing checker for learners who want to understand their mistakes instead of only having them corrected. You paste an email, a chat message, or a short paragraph, and the tool marks what is wrong, explains the grammar rule behind each change, and turns the error patterns you repeat into targeted practice. It is aimed at intermediate and advanced English learners, students, and professionals who write in English every day but still fall back on familiar slips such as "didn't saw" or "didn't went". The product combines a text checker, a personal vocabulary builder, grammar drills, and a Chrome extension, with an interface available in English and Russian.

What Makes Blindspot Stand Out

• Explanations, not just corrections: Every edit is paired with a short note on why it changed, so you learn the rule instead of copying the fix. A typical result shows the original phrase, the corrected version, and a plain-language reason, such as why the base form follows "didn't".
• Practice built from your own writing: When the same grammar topic appears across your texts, Blindspot groups it and generates exercises around it. The site demonstrates this with Past Simple negative sentences collected from three separate example texts.
• Vocabulary from real context: Suggested words come with definitions, parts of speech, collocations, and synonyms, and you choose which ones to save, keeping your personal dictionary focused on what you actually want to learn.
• Chrome extension for browsing: Select a word on any page and save it to your vocabulary, or run a writing check without leaving the tab.
• Free English level test: A short placement test gives you a starting point before you begin practice, and the public checker accepts 30 to 300 characters, while checks inside your account accept up to 5,000.

Who Should Use Blindspot

• Intermediate and advanced English learners who already know the rules on paper but keep making the same mistakes in everyday writing. Blindspot surfaces those repeated blind spots and drills them directly.
• Students and working professionals who write emails, reports, and messages in English and want feedback on real work rather than textbook exercises. The vocabulary tool also helps expand phrasing for academic and business writing.
• Self-taught learners using AI tools who want an explanation layer on top of autocorrect. The product states that submitted text is sent to OpenAI for analysis, and results are stored in your account so you can revisit them.

Frequently Asked Questions

What is Blindspot?

Blindspot is a web app that checks English writing with AI, explains the grammar behind each correction, and builds personalized practice from the mistakes you make most often. It also includes a vocabulary builder, grammar exercises, and a Chrome extension for saving words while you browse.

How does Blindspot check my English writing?

You paste text into the checker, sign in with Google if you are not already signed in, and choose your native language if needed. The text is sent to OpenAI for analysis, and the corrected version, grammar notes, and vocabulary suggestions open in your account. Drafts typed on the public homepage stay in the browser tab until you submit them.

Is Blindspot free to use?

Yes, you can create an account and try text checks and personalized practice for free, with no card required, and pay later if you want more practice. The homepage checker is limited to 30 to 300 characters, and words are added to your dictionary only when you choose to save them.