Blindspot is an English writing checker and personalized practice tool that analyzes your own text, explains the grammar rules behind each mistake, and converts recurring errors into targeted vocabulary and grammar drills.
What is Blindspot?
Blindspot is an English learning tool built around your own writing. You paste English text into the checker, and it returns a corrected version, an explanation of why each change was made, and suggested words you can save to a personal vocabulary list. The web app accepts 30–300 characters in the homepage form and up to 5,000 characters inside an account, and it also ships as a Chrome extension for checking writing and saving words while browsing.
Key Features
- Writing check with rule explanations — Submitting text returns a correction (for example, "didn't saw" → "didn't see") plus a short note on the underlying rule, such as using the base verb form after "didn't".
- Personalized vocabulary saving — Suggested replacements (for example, "готовился" → "was preparing / was studying") are offered as words you choose to add or skip, keeping your dictionary focused.
- Word detail cards — Each saved word shows meaning, part of speech, example sentence, collocations ("make every endeavour", "creative endeavour"), and synonyms.
- Flashcard practice — Saved vocabulary feeds into flashcard review.
- Grammar practice by shared topic — Mistakes are grouped into topics such as "Past Simple: negative sentences", followed by a multiple-choice question to test the rule.
- Chrome extension — Select a word on any page and click + to save it, or check writing without leaving the browser.
- Free English level test — A separate level test is available for users who don't know where to start.
- 50+ blind spot patterns — The site states it covers more than 50 recurring error patterns.
Who is it for?
- English learners writing daily — Anyone writing emails, messages, or short diary-style texts who wants corrections tied to the rules they keep breaking.
- Intermediate learners with recurring errors — People who make the same grammar mistakes repeatedly and need the pattern named rather than each instance fixed.
- Vocabulary builders — Learners who want to save words they actually encounter in their own writing and review them as flashcards.
- Browser-based readers — Users who want to save words from articles and pages via the Chrome extension.
What can you do with Blindspot?
- Check a short text: Paste 30–300 characters on the homepage and get a correction, a rule explanation, and optional vocabulary suggestions.
- Practice a weak grammar topic: After a mistake is grouped under a topic like negative past simple sentences, answer a follow-up question such as "She didn't ___ to the meeting."
- Build a personal dictionary: Add only the suggested words you want, then review them with flashcards and collocation lists.
- Check longer texts in-app: Signed-in users can check texts up to 5,000 characters.
How does Blindspot work?
Paste your text and click "Check my text". If you are not signed in, a window opens so you can continue with Google; your draft stays in the browser tab until you sign in and choose your native language. Blindspot then sends the text to OpenAI for analysis and stores the text and result in your account.
Pricing
Blindspot is free to start: you can create an account and try text checks and personalized practice at no cost, with no card required. Paid options for more practice are available later.
FAQ
Is Blindspot free to start?
Yes. You can create an account and try text checks and personalized practice for free with no card required. Paid plans for additional practice are optional and can be chosen later.
What happens when I click "Check my text"?
If you are not signed in, a window opens so you can continue with Google. Your text stays in the browser tab until you sign in and pick your nat
