What is Blindspot?
Blindspot is an English writing checker built around a simple idea: corrections alone don't teach you much. Instead of silently fixing your text, it explains the grammar rules behind each mistake and turns the errors you keep repeating into personalized practice. Paste an email, a message, or a few sentences, and you get corrections paired with grammar notes, vocabulary flashcards, and collocations drawn from your own writing.
The approach is captured in its own tagline — learn English through your own writing. Rather than working through generic textbook exercises, you study the exact patterns that trip you up.
Who it's for
- Intermediate English learners who communicate in English regularly but keep making the same recurring errors.
- Professionals writing emails and work notes who want cleaner text and a better understanding of why something was wrong.
- Self-directed learners who prefer studying their own material over generic course content.
Key features
Text checking with grammar notes
Submit up to 5,000 characters in your account and receive corrections alongside explanations. Notes like "base form after didn't" show the rule behind a fix such as didn't saw → didn't see, so the same mistake is easier to catch next time.
Vocabulary flashcards
Suggested words come with meanings, example sentences, collocations, and synonyms. You decide which ones to add, keeping your personal dictionary focused on what you actually want to learn.
Grammar and vocabulary practice
Practice is organized around topics that emerge from your own writing. Example texts sharing a common mistake feed into a shared grammar topic, followed by a question to test whether the rule has stuck.
Chrome extension
A browser extension lets you save words and check writing while you browse. Select a word, click +, and it goes into your vocabulary.
What stands out
Learn English through your own writing.
That single line sums up the product's edge. Most checkers stop at the corrected sentence, leaving you to guess why it changed. Blindspot closes the loop by connecting each correction to a rule, then feeding that rule back as practice. Over time, your weak spots become the syllabus — which is a far more efficient way to improve than reviewing material you already know.
Worth checking out if…
You want your writing mistakes to actually teach you something. If you're tired of correcting the same errors again and again, or you'd rather build vocabulary from words you genuinely use, Blindspot is designed for exactly that. It's free to start with no card required, so you can test a text and see whether the explanations click before committing to more practice.
