Prism for Gemini: Themes, Wide Chat & Prompts

Customize Gemini with themes, custom backgrounds, wider chat text and a prompt library. Free, private, no ads.

Make Gemini look and work the way you like. Prism for Gemini adds themes, a wider reading column, a prompt library and handy tools to the Gemini web app. One switch turns it all off. THEMES & LOOK • One-click quick themes: Classic, Ocean, Forest, Sunset, Rose and Mono • Any accent color, plus Default, Darker or pure Black surfaces • Your own background image or built-in gradients, with fit, blur and darkening controls • Custom color for your message bubbles WIDER CHAT & EASY READING • Stretch answers across your screen instead of a narrow column • Font size and line spacing controls • Focus mode, hide sidebar, and an optional AI disclaimer PROMPT LIBRARY • 36 ready-made prompts in 6 categories: Coding, Writing, Learning, Productivity, Analysis and Career • Optional community collection, downloaded only when you click • Save your own prompts in folders, search and edit them • Fill-in fields like {{topic}} so one template fits every task HANDY TOOLS • Export any chat to Markdown • Save code blocks as files with one click • Tab icon blinks while Gemini is answering and shows a dot when it's done • Backup and restore all settings • Shortcuts: Alt+Shift+B opens the panel, Alt+Shift+F toggles focus mode • Master ON/OFF switch in the toolbar popup PRIVACY FIRST Your settings and prompts stay in your browser. No accounts, no analytics, no ads. Your conversations are never collected or sent anywhere. HOW TO USE 1. Install and open gemini.google.com 2. Click the ⚡ button at the bottom right (or press Alt+Shift+B) 3. Pick a theme, set your width, save your favorite prompts FREE, MADE IN SPARE TIME If it makes your Gemini a little nicer, you can buy me a coffee from the popup. Telling a friend helps just as much. Prism for Gemini is an independent project. It is not affiliated with, endorsed by or sponsored by Google. Gemini is a trademark of Google LLC.