Sheetsbase is a lightweight, free Chrome extension in 2026 that supercharges Google Sheets with AI: generate complex formulas from plain English prompts, get simple explanations for existing formulas, browse/save favorites, and access 240+ built-in formulas + 130+ keyboard shortcuts—all right in a side panel without leaving your sheet. No more tab-switching or endless Googling. Privacy-friendly, no data storage issues, perfect for analysts, marketers, students, and anyone tired of formula hunting.