No-AI Day

No-AI Day is a Chrome and Firefox extension that blocks AI assistant websites one day a week. On that day, opening ChatGPT, Claude or any other site on the list shows a yellow and black sale poster that reads "Today is No-AI Day". The original name is Catalan, "Dia sense IA", a play on the "Día sin IVA" (VAT-free day) sales that Spanish appliance stores run.

Where it comes from

One day, the AI agent we were working with ran out of tokens halfway through a job and we had to finish the changes by hand. We hadn't done that in a while, and we found we had forgotten git commands we used to type every day. We decided to work without AI one day a week. The extension is there so that day has no temptations.

How it works

Friday is the default day. You can pick another one, or several, in the options. While the block is on, the extension icon shows "OFF". At midnight everything works again.

It blocks chatgpt.com, chat.openai.com, claude.ai, gemini.google.com, copilot.microsoft.com, perplexity.ai, chat.mistral.ai, chat.deepseek.com, grok.com and poe.com. It only acts inside the browser: assistants in your editor and terminal keep working.

Privacy

The extension doesn't collect or send any data. It only stores the days you pick in the browser's storage.

Status

We've submitted it to the Chrome Web Store and Firefox Add-ons, and it's waiting for review in both. Until then, you can install it from the source on GitHub, as the README explains. It's available in English, Spanish and Catalan.