How to Get an Instant AI Explanation for Any Text You Highlight
Stop switching tabs to paste text into a chatbot. Here's how to highlight text on any page and get an AI explanation, summary, or rewrite instantly.
The most common way people use AI chat tools for reading comprehension is genuinely inefficient: highlight the confusing text, copy it, switch tabs to the chatbot, paste it, type “explain this,” wait, read the answer, switch back. That’s five steps and a tab switch to ask one question.
The right-click-to-explain pattern
If you’ve ever used “search this on Google” from a right-click context menu, you already understand the better version of this workflow: highlight the text, right-click, pick an action, and get the answer without ever leaving the page or losing your place. Applied to an AI model instead of a search engine, the same interaction covers a lot more than lookups — it covers explanation, summarization, and rewriting.
This is a small interaction change, but it removes almost all the friction from a task people already do constantly: reading dense documentation, legal text, academic papers, or unfamiliar jargon and wanting a plain-language version without breaking focus.
What’s actually useful beyond “explain”
Once the highlight-and-act pattern exists, a few more actions become obviously useful alongside plain explanation:
- Summarize — condense a long paragraph or section down to its core point.
- Improve — rewrite the selected text for clarity, tone, or grammar, useful when you’re highlighting your own writing rather than something you’re reading.
- Follow-up questions — the ability to ask something like “why does that matter here?” in the same panel, without starting a new conversation from scratch.
- Adjustable tone — a technical explanation and a casual one are both valid depending on who’s asking.
Bring your own model, keep your own data
DecodAI implements this pattern and deliberately doesn’t route your text through its own servers or a bundled model. You connect your own API key for OpenAI, Anthropic (Claude), or Google Gemini, and the extension talks directly to whichever provider you chose. That means:
- Your highlighted text goes straight to the AI provider you picked — not to a third-party relay.
- Your API key is encrypted on your device, not stored on a remote server.
- You’re using the model and pricing tier you’ve already chosen to trust, rather than an unknown one bundled into the extension.
On top of the core explain/summarize/improve actions, it supports keyboard shortcuts for triggering it without a right-click, follow-up questions in the same panel, adjustable tone, and dark mode.
Setting it up
Add your API key for whichever provider you already use once, then highlight any confusing sentence on any page and right-click. It’s most useful on dense reading — documentation, contracts, academic writing, or unfamiliar technical explanations — where switching tabs to a chatbot would otherwise break your reading flow every single time.
