How To Fix Grammar In Any Text Field With PI Fix Grammar? (2026)

I post on X most days, and the pattern was always the same: hit publish, read it back, and spot the typo four seconds too late. A missing apostrophe, a doubled word, a sentence that lost its verb somewhere. Deleting and reposting costs you whatever traction the post had, and leaving it there quietly annoys you all afternoon.This article is about the small tool I built to stop that happening. It fixes the grammar in any text field with a single tap, for free, without sending a word of your text to anyone. And it uses the latest LLM technology, which shines in grammar.How To Start?Install the extension, and that is genuinely it. There is no account to create, no email to hand over, no trial to start and no credit card to enter.Add to Chrome (install the free) PI Fix Grammar Chrome Extension.Pin it to your toolbar so you can reach the settings quickly.Start typing anywhere. The first correction downloads Chrome's on-device AI model (a one-time download of roughly 2 GB), and everything after that is instant. In most cases it already sits on your device.What is PI Fix Grammar?The idea is borrowed, and I am happy to admit it. On my Android phone, Google's keyboard does this small magic t...