Not one document — the whole library. Articles, PDFs, YouTube videos and Kindle books, answered from the passages you chose to keep.
Reading on your phone?
Chat with everything you've saved from the Clone tab in the Glasp app — iPhone, iPad and Android.
Chat with Highlights answers questions from every passage you have ever saved to Glasp — web articles, PDFs, YouTube videos and Kindle books together — rather than one document at a time. Because the corpus is sentences you personally chose to keep, the answers are checkable: each one points back at the highlight and the source it came from. Free monthly quota, no credit card.
Articles, PDFs, YouTube videos with timestamps and imported Kindle books all land in one library.
Not one document — everything. Ask what your sources said about a topic, or what you thought a year ago.
Answers point at the highlights they were drawn from, so you can open the original and check it.
Ask what your sources said about a topic and get an answer assembled from a paper you read in March, a video from last week and a book from two years ago — without remembering that any of them existed.
The Glasp extension highlights any webpage or PDF in Chrome, Safari, Edge and Firefox. Add a note while the thought is fresh — notes are part of what the chat can answer from.
Highlight a moment in a video and the timestamp comes with it, so an answer about a video can send you straight back to the second it came from.
Import from Kindle, Instapaper, Medium, Hypothesis, Weava and more, so the library starts from years of reading instead of from today.
These Glasp readers published theirs. Ask one a question — no account needed.
Highlight anything on the web or in a PDF and keep it with a note.
When the question is about one document, ask that document.
Bring your Kindle highlights in and review them daily.
Draw passages at random and let AI find the connection.
Full-text search across every highlight, tag and author you have.
The MCP connector lets Claude answer from your own highlights.
researchers, students, and lifelong learners highlight with Glasp.
“I love Glasp! I use it every time I read online articles. Highlighting with Glasp enforces me to actually read rather than scan through an article. I retain so much more info and can easily revisit my previously read articles to recall details and notes I've made.”
“I've researched every highlighting tool from Liner and Hypothesis to Instapaper and Pocket, and Glasp is the best hands-down. First, it creates a whole category of its own with social highlighting. This is important because it helps learners get recognized for finding amazing highlights, and it helps them connect with others who are learning the same thing at the same time. Also, it has the best highlighting workflow. While reading an article, you can select text in order to highlight and annotate without having to go to a different page. Furthermore, all of your highlights for a specific article appear on a right sidebar as you're reading, and they're easy to copy and paste into another note-taking app.”
“I used Instapaper but ended up hating it and stopped. There just wasn't a tool for me to continue using until Glasp. I was hooked immediately for the ease of use (highlight directly on the article web page), organized feed, and learning from others' highlights and notes. It makes sticking to learning something so easy and you can no longer find any excuses. Highly recommended to anyone who loves reading awesome articles or want to start forming such habit.”
Chat with Highlights lets you ask a question across every passage you have ever saved to Glasp — from web articles, PDFs, YouTube videos and Kindle books at once — instead of one document at a time. Answers point back at the highlights they came from, so you can open the original source and check them.
Scope. PDF chat answers from one document; this answers from your whole library, which is where the interesting questions live — 'what have I read about pricing', 'what did I think about this two years ago', 'which of my sources disagree'. Single-document chat is on the Chat with PDF page.
The input. A general model answers from the open web; this answers from sentences you personally chose to keep, in sources you chose to read. That is a much smaller corpus and a much more trustworthy one, because you can check every claim against the passage it came from.
Yes. Every answer points back at the highlights it drew on, with the article, PDF, video or book they came from. An answer you cannot trace is not much use.
Web articles, PDFs, YouTube videos with timestamps, and Kindle highlights you import. Imports from Pocket, Medium, Instapaper, Readwise, Hypothesis, Diigo, Raindrop and Weava all feed the same library.
Yes. Every Glasp account includes a free monthly AI quota with no credit card. The pricing page has higher limits for heavy use.
Only if you want them to. Publishing your AI clone gives it a page at glasp.co/ask/your-username that anyone can ask a question of. Highlights you mark private stay out of it.
No. Glasp does not sell your data and does not use your content to train public AI models. See the privacy policy for details.
Yes. The Glasp MCP connector exposes your highlights to Claude and other MCP clients so they can answer from what you have saved.
More questions? Read the docs or email hi [at] glasp.co.
Add Glasp to your browser and start keeping the passages worth asking about. It's free.
Start on your phone
Chat with everything you've saved from the Clone tab in the Glasp app — iPhone, iPad and Android.