Decoder — AI terms, explained in place

Decoder is an AI dictionary for your browser. It underlines AI jargon — RAG, MCP, embeddings, context window, hallucination and more — on any web page, and explains each term in plain English when you click it: a straight explanation, an analogy, and a real example, without leaving the page. Sometimes it isn't one word — it's the whole sentence. Highlight it, click Decode, and it comes back in plain English right where it sat. The paragraph you were about to skip becomes one you can actually read. Save the ones that keep tripping you up and they become a short list you can skim before a meeting. Signed-in saves sync with the Decoder web app. - Plain-language explanations, not textbook definitions - Decode a whole sentence, not just a word — one click, explained in place - Every term shows its status — Core, Rising, Fading or Historical — so you know what's still worth learning - Works on any page; the underlines are subtle and easy to ignore - Separate switches for highlighting and decoding — run either on its own - Optional sign-in syncs your saved terms with the Decoder web app - No ads, no tracking. Terms are matched on your device. Decoding sends just the sentence you highlighted — nothing else about the page — and you can switch it off