Color-coded web and PDF highlighting
Highlight websites and PDF files with multiple colors, then review those highlights later from your Glasp homepage.
Glasp Web Highlighter
Glasp Web Highlighter is a free Firefox extension to highlight, annotate, organize, and share web pages, PDFs, images, and YouTube videos with AI summaries and export tools.
Overview
Glasp Web Highlighter is a Firefox add-on for highlighting and annotating web pages, PDFs, images, and YouTube videos. It is built to help users collect quotes, notes, and other saved passages in one place, with those highlights curated to a Glasp homepage.
The extension also emphasizes organizing and revisiting saved material. Users can tag, search, link, and share highlights, view them in a sidebar, and jump back to the original highlighted location in a web page or PDF. The listing describes it as a free add-on for Firefox.
Features
Sidebar review and in-context navigation
See all highlights and notes in a sidebar on web pages and PDFs, and jump back to the exact highlighted location.
Tagging and linked highlights
Add tags and links to highlights so they can be organized and retrieved more easily.
One-click export to notes tools
Save copied highlights and notes, including metadata, into a note-taking app in one click.
AI-powered summarization
Use AI models such as ChatGPT, Claude, Mistral AI, and Gemini to summarize YouTube videos, web articles, and PDFs based on your annotations.
Video annotation and quoteshot creation
Capture highlights and annotations from YouTube videos and generate quoteshots from webpages.
Use cases
Reading and research notes
Save important passages from articles or reference pages, then revisit them later from the Glasp homepage or the original page with the highlights still visible.
PDF study and review
Review a PDF inside Firefox, keep comments tied to the text, and use the sidebar to move between saved points quickly.
Video summarization
Watch a YouTube video and capture highlights or annotations, then use AI summarization to turn those notes into a faster recap.
Personal knowledge organization
Organize collected passages with tags and links, search them later, and copy the full set of highlights and notes into a note-taking app.
Sharing saved insights
Share selected highlights with others on supported platforms such as Twitter, Teams, and Slack.
Pros and Cons
Pros
- Supports highlighting across websites, PDFs, images, and YouTube videos.
- Adds a sidebar for reviewing highlights and notes in context.
- Lets users tag, search, link, and share highlights.
- Can summarize content with AI models including ChatGPT, Claude, Mistral AI, and Gemini.
- Offers one-click export of highlights and notes with metadata to a note-taking app.
Cons
- The add-on page does not provide pricing detail beyond saying it is free.
- The listing gives limited detail on supported integrations beyond sharing to services such as Twitter, Teams, and Slack.
- The Firefox add-on page does not spell out team or enterprise features in detail.
FAQ
Is Glasp Web Highlighter free on Firefox?
Yes. The extension is described as a free Firefox add-on on the product page.
Which browser does it support?
The add-on is presented for Firefox, and the page shows a Firefox browser add-on listing.
What can I highlight with it?
The page says it can highlight websites and PDF files, and it also supports highlighting and annotation on YouTube videos.
What can I do with saved highlights?
The page says highlights and notes can be curated to your Glasp homepage, and that you can tag, search, link, and share them.
Does it collect any data?
The page lists support and privacy links, and the add-on description says data collection includes website activity and website content, with optional technical and interaction data.
Quick Facts
- Category
- Browser extension
- Platform
- Firefox
- Pricing
- Free add-on
- Source domain
- addons.mozilla.org
- Primary workflow
- Highlight, annotate, organize, summarize, and share saved content
- Version
- 2.1.2
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