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Glasp Web Highlighter Chrome Extension

Highlights text on any page, PDF or YouTube video, then syncs it to one place.

Checked 4 Oct 2026 Reviewed by Alex Listed since September 2024

Screenshot of Glasp Web Highlighter Chrome Extension

At a glance

Starts at Free Listed as free on the Chrome Web Store.
Free tier Yes
Platforms Chrome
Best for Readers building a searchable library of saved quotes
Not for Anyone wanting to keep highlights entirely private by default

4.5 out of 5

Scored by Alex after real use

Our verdict

Glasp lets you highlight text on any website, inside a PDF, or over a YouTube video, in a choice of colors, then pulls everything into one searchable homepage you can tag and link to. AI models including ChatGPT, Claude, Mistral and Gemini can summarize what you've collected, and Kindle highlights sync in too. It's built around a social layer as much as personal storage, with public curators to follow and collections you can share on Twitter, Teams or Slack, so it's less suited to someone who wants highlights kept strictly private.

✓What it does well

Highlights everywhereYou can highlight websites, PDFs, images and YouTube videos alike.
AI-powered summariesSummaries of what you've annotated are generated using several AI models.
Cross-device accessSaved highlights sync and appear across all your devices.

✕Where it falls short

Built for public sharingThe platform leans toward public curators and shared collections, not a purely private notebook.
Depends on third-party AISummaries depend on external AI models like ChatGPT, Claude or Gemini.
Chrome onlyIt's only available as a Chrome extension, not other browsers.

Key features

Multi-color highlightingHighlights can be marked in several different colors for organizing.
YouTube and PDF supportHighlighting and annotation work on YouTube videos and PDF files too.
AI annotation summariesYour highlights and notes can be summarized using AI models.
Kindle highlight syncHighlights from Kindle eBooks sync in alongside your web highlights.

Questions about Glasp Web Highlighter Chrome Extension

What does Glasp Web Highlighter Chrome Extension do?

Glasp Web Highlighter Chrome Extension highlights text on any website, inside a PDF or over a YouTube video, in a choice of colors. Everything collected goes into one searchable homepage that can be tagged and linked to, and Kindle highlights sync in alongside web highlights.

Is Glasp Web Highlighter Chrome Extension free?

Glasp Web Highlighter Chrome Extension is listed as free on the Chrome Web Store, and no paid plan is listed. It works only in Chrome, though saved highlights sync and appear across all of a user's devices.

Can Glasp Web Highlighter Chrome Extension summarize highlights with AI?

Yes. AI models including ChatGPT, Claude, Mistral and Gemini can summarize collected highlights and notes in Glasp Web Highlighter Chrome Extension. The reviewer counts these AI summaries among the tool's strengths but also notes that they depend on external AI models.

Are highlights in Glasp Web Highlighter Chrome Extension private?

Glasp Web Highlighter Chrome Extension leans toward public sharing rather than a purely private notebook. The reviewer describes a social layer with public curators to follow and collections that can be shared on Twitter, Teams or Slack, and Toolio marks it as not for anyone wanting highlights kept entirely private by default.

How does Toolio rate Glasp Web Highlighter Chrome Extension?

Alex scored Glasp Web Highlighter Chrome Extension 4.5 out of 5 after real use, on 4 Oct 2026. It is best for readers building a searchable library of saved quotes, and it has been listed on Toolio since September 2024.

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