Improve Sentence

AI-powered writing improver — select any text on any page to improve it instantly with OpenAI, Claude, Gemini, or Ollama.

Improve Sentence is an AI-powered writing assistant that rewrites any text you select on any webpage — instantly and privately. ✦ HOW IT WORKS 1. Select any text on any page 2. Press Cmd+Shift+K (or right-click → "Improve Sentence") 3. See the improved version appear in a sleek overlay panel 4. Click Accept to replace the text, or Copy to use it elsewhere ✦ TONE CONTROLS Choose from four writing modes: Improve (clarity & flow), Simplify (plainer language), Formal (professional tone), or Casual (friendly tone). Use the Tune panel to apply quick actions like Shorten, Fix grammar, or Expand — or add a custom instruction. ✦ YOUR CHOICE OF AI Works with OpenAI (GPT-4o), Anthropic Claude, Google Gemini, and Ollama (local models, no API key needed). Switch providers any time from Settings. ✦ COMPLETELY PRIVATE Your API keys and writing history never leave your browser. There is no backend server — all AI calls go directly from your browser to the provider you choose. No accounts, no tracking, no ads. ✦ KEYBOARD SHORTCUT Cmd+Shift+K (Mac) / Ctrl+Shift+K (Windows/Linux) — works on any selected text, anywhere on the web.