Understand web content faster.

PageScope is a free Chrome extension that summarizes webpages, PDFs, and YouTube videos and answers follow-up questions using your choice of AI provider.

Add to Chrome — it's free See examples

science.nasa.gov

Webb · Universe

NASA's Webb stuns with a new high-definition look at an exploded star

NASA · 6 min read

NASA's James Webb Space Telescope has released its highest-resolution infrared image yet of Cassiopeia A, the remnant of a star that exploded roughly 340 years ago as seen from Earth.

The colors translate invisible mid-infrared wavelengths into detail scientists can study: clumps of warm dust glow orange and red, while filaments of ionized gas trace the leading edge of the blast wave.

Researchers were surprised by a large, looping structure in the inner shell — nicknamed the Green Monster — whose origin remains debated and is the focus of follow-up observations.

Work right on the page.

Highlight any passage and a quiet action bar appears — act on just that selection, without opening the popup.

science.nasa.gov

In Webb's new image, the supernova remnant Cassiopeia A shows

a puzzling loop of cooler material nicknamed the “Green Monster.”

Everything happens on the page you're reading.

No copy-paste, no juggling tabs. PageScope reads the page in place and brings the answer to you.

Summaries that respect the page

Turn the current page, your selection, a PDF, or a supported video into clean, structured points — then run your own plugins right on the summary.

Your assistant, beside the page

Read, summarize, and keep asking in the side panel. Switch back to the floating popup whenever you like.

Your provider, your choice

Route to the AI you already use and switch models whenever you like. PageScope builds the bridge; you stay in control.

Yours, end to end.

A private local history and the controls to shape PageScope around how you read.

Private, local history

Optional per-page history with retention and maximum-entry controls. It stays on your machine.

Make it yours

Prompt templates, response language, quick prompts, slash commands, and plugin cards that run extra prompts on a summary.

Frequently asked questions

Is PageScope free?

Yes. You connect the AI provider you already use, so there's no separate PageScope subscription or paywall.

Do I need to create an account?

No. There is no PageScope account or sign-up. Install the extension, choose your provider, and start summarizing.

Which AI providers can I use?

Use Codex, your logged-in ChatGPT, Claude, Gemini, or Perplexity, or connect any OpenAI-compatible API with your own key and endpoint. You can switch providers and models whenever you like.

Where does my page data go?

Captured page content is sent only to the provider you choose, to answer your request. Optional conversation history is stored locally on your machine, with retention and maximum-entry controls.

Does it work on PDFs and videos?

Yes. Alongside ordinary webpages, PageScope can summarize PDF documents and supported video pages, then answer follow-ups about them.

Is PageScope affiliated with any AI company?

No. PageScope is an independent project. It is not affiliated with, endorsed by, or sponsored by any provider, browser, or website it can connect to.