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Skim Recap

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Skim Recap is a Chrome extension that detects fast scrolling and summarizes the passage you skipped, helping readers recover context without leaving the page. Its summaries run locally in the browser with Gemma 4 E4B through LiteRT-LM.

What is Skim Recap?

Skim Recap is a Chrome extension that helps readers recover context after moving quickly through a web page. It detects a fast scroll, estimates the passage between the previous and current reading positions, and displays a short recap beside the cursor instead of summarizing the whole page.

The recap is generated locally in Chrome with Gemma 4 E4B Instruct through LiteRT-LM and WebGPU. The model is downloaded once and cached by the browser for reuse during the session, while the skipped article text is processed on-device rather than sent to a hosted LLM API. The workflow is intended for long articles, documentation, essays, and research posts where readers want to skim without losing the thread.

What can Skim Recap do?

Fast-scroll passage detection

The extension monitors scroll velocity and treats scrolling at approximately 1,800 pixels per second as a potential skipped-reading event. After a 180-millisecond settling period, it calculates the distance moved and identifies the relevant passage.

Passage-bounded recaps

Skim Recap extracts text from the range the reader moved past rather than summarizing the entire page. This keeps the recap focused on the context that was skipped.

On-device Gemma runtime

Gemma 4 E4B Instruct runs locally through LiteRT-LM and WebGPU in a Chrome offscreen document. The model is downloaded once, stored with the browser Cache API, and reused across webpage tabs during the browser session.

Cursor-adjacent reading panel

The recap appears near the cursor and streams into the same reading surface. The panel includes local model status, a copy action, a layout control, and a translation action.

Focus and Smart layouts

Focus mode renders the generated recap as a paragraph, while Smart mode presents the same generated text as numbered points. Switching layouts reshapes the existing result and does not run the model again.

User-requested Feynman explanations

Readers can select a phrase on the page or inside the recap card to reveal a Feynman action and request an explanation. This explanation flow is separate from the normal recap and does not run unless the reader asks for it.

Use Cases

“Skimming long-form articles”

Move quickly through a lengthy article and use the recap to restore the context between two reading positions without returning to the earlier paragraphs manually.

“Navigating technical documentation”

Scan documentation for the relevant section while retaining a compact reminder of a skipped explanation, prerequisite, or transition in the material.

“Reviewing essays and research posts”

Use passage-specific recaps to follow an argument when reading speed changes, without replacing the source with a summary of the entire page.

“Clarifying unfamiliar terms”

When a skipped passage or recap refers to a term the page does not define, select the phrase and request a Feynman explanation rather than expecting the bounded recap to add outside context.

Frequently Asked Questions

What does Skim Recap summarize?

It summarizes the text positioned within the passage the reader skipped during a qualifying fast scroll. It does not summarize the entire page.

Where does the model run?

Gemma 4 E4B Instruct runs locally in Chrome through LiteRT-LM and WebGPU, inside a Chrome offscreen document. The site states that skipped article text is not sent to a hosted LLM API.

How is a recap triggered?

The documented trigger uses a scroll velocity of approximately 1,800 pixels per second, followed by a 180-millisecond settling window. The default skipped distance is 1,200 pixels, with an adjustable range of 400 to 3,000 pixels.

Can the recap define a term that the article never explains?

Not through the normal recap, which is intentionally limited to the skipped passage. A reader can select a phrase and use the Feynman action to request a separate explanation.

Do Focus and Smart modes generate different summaries?

No. They use the same generated recap. Focus displays it as a paragraph, while Smart reshapes it into numbered points without regenerating the model output.

Quick Facts

Product type
Chrome extension
Primary workflow
Recap text skipped during fast scrolling
Model
Gemma 4 E4B Instruct
Runtime
LiteRT-LM with WebGPU
Processing
On-device in a Chrome offscreen document
Default scroll trigger
Approximately 1,800 px/s velocity; 1,200 px skipped distance

Skim Recap Traffic Analysis

Traffic data is for reference only.

Monthly Visits
0
Global Rank
-
User Bounce Rate
0.00%
Avg. Visit Duration
00:00
Pages per Visit
0.00
Domain Rating
93

Traffic Trends

Traffic Sources

Traffic analytics are not available yet.

Top Regions

Traffic analytics are not available yet.

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