AI summary for web pages

Facts worth checking first

• What it does: Summarize a full page or selection with AI and extract key points quickly.
• Page content, selections, and generation results stay on this device by default and are not uploaded to KnowIt.
• This tool calls a model with your own API key. KnowIt does not provide a model account.
• Lifetime license, ¥6.66.

Read the full FAQ

Design notes: Content Summary

1. Bring summarizing down from the whole page to a passage

Summarizing an entire article solves the problem of “reading all of this is exhausting,” but that's not where the need ends. Often you only want to work out what one long stretch in the middle is actually saying, or you're stuck on a single dense section — and yet, for a few hundred words of confusion, you're made to summarize the whole article and then dig through the result for your answer, which ends up slower. Summarizing a selection takes the grain from “the whole page” down to a paragraph, or even a couple of sentences. Highlight whatever isn't clear and hit exactly that, instead of processing a wall of text for one small part of it.

2. There when called, never breaking your rhythm

While you're reading, your attention flows continuously. Jumping out to open another tool, pasting the text in, waiting for output, then switching back to read it — that interruption alone costs real energy. Select the text and a floating button appears; one click starts the summary. The whole path is compressed to its shortest form: you never leave the page, never switch apps, and barely move your eyes. This design tucks the tool entirely behind a gesture. When you want it, it's at hand; when you don't, it never shows up, so nothing intrudes on immersive reading.

3. Make a thick book thin, and save your attention too

Whole-page or selected-passage, the underlying idea is the same: pull the substance out of redundant text. A full summary builds the wide view and lets you grasp the shape of a piece quickly; a passage summary is targeted, clearing one local obstacle at a time. The two work together — use the full summary to judge whether an article deserves a close read, then use passage summaries to chew through the hard parts while reading it properly. Throughout, you stay in charge: not dragged down by length, and not lost among fragments. Every bit of effort goes where it counts.

4. Natural output, faithful to the source, and restrained

Every summary follows the same rules. The language should be fluent and natural, reading like something a person wrote, never stiff or awkward. The content stays strictly faithful to the original: nothing added, nothing altered, nothing twisted. And it says plainly that this is an assistive tool — when a decision matters, go back to the source text. Whether you summarize a whole article in one click or highlight a passage in passing, every summary should be worth the trust placed in it: no hand-waving, no fudging, and no promises it can't keep.