Custom backgrounds for ChatGPT, Claude, Gemini & Grok.
Pick from stunning built-in themes or upload your own image. Smooth fade animations, iMessage-style chat bubbles, and full sidebar transparency.
Cyber, Fantasy, and Unicorns — widescreen art that fills your entire browser.
Use any image from your computer as a chat background. It's saved locally and persists across sessions.
Backgrounds fade in over 2 seconds. Switching themes plays a fade-out / fade-in transition.
iMessage-style colored bubbles — teal for your messages, dark for the assistant. Always readable.
Background shows through the sidebar, header, and every corner of the page. No blind spots.
No data leaves your browser. No analytics, no tracking, no server calls. Fully open source under MIT.
Cyber
Fantasy
Unicorns
Use a photo of your dog, your favorite artwork, or anything you like.
Clone or download the repo from GitHub.
Go to chrome://extensions and enable
Developer mode.
Click Load unpacked and select the project folder.
Click the extension icon, choose a theme, and enjoy.
This project is free and open source. If it makes your AI chats more fun, consider supporting the development.
❤️ Sponsor on GitHub