Select a passage, pick a color, add a note. Glasp keeps the page, the source and the date — and gets it out again as Markdown, Notion or CSV whenever you want it.
Reading on your phone?
Open a PDF in the Glasp app's Reader and highlight it on your phone — iPhone, iPad and Android.
Glasp is a free browser extension that highlights and annotates PDFs the same way it highlights a webpage. Select a passage, pick one of four colors, and add a note; Glasp stores it with the document, the page number and the date. One click copies every highlight from the PDF, and exports go to Notion, Obsidian, Roam, Markdown, HTML, CSV or JSON. A PDF you open locally never has to be uploaded.
Open any PDF in your browser, or upload one to your Glasp library if it is not on the web.
Select a passage, pick a color, and add a note. Glasp keeps the page number and the surrounding context with it.
Copy every highlight from the document in one click, export to Notion, Obsidian or Markdown, or ask the PDF a question.
Glasp works on a PDF open in your browser — a paper, a spec, a contract, a course handout. Four colors, notes on any passage, and the page number recorded with every highlight so a citation is one click away.
Copying out of a PDF normally produces one long line with the hyphenation still in it. Glasp copies the passage with its structure intact, in the format you are going to paste into.
Tag highlights as you make them and every PDF, article, video and book you have read becomes one searchable library rather than a folder of files you will never open again.
Send PDF highlights to Notion, Obsidian, Roam Research or mem.ai, or download as Markdown, HTML, CSV, plain text or JSON. Nothing you highlight is locked into Glasp.
Ask questions about the document and get answers that cite the pages they came from.
Turn a long document into a summary written from the passages you kept.
The same extension highlights any webpage, not only PDFs.
One library for PDFs, articles, videos and books, searchable in seconds.
Bring highlights over from Kindle, Pocket, Medium, Instapaper and Readwise.
The MCP connector lets Claude and other AI tools 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.”
Glasp is a free browser extension that highlights and annotates PDFs the same way it highlights a webpage. Select a passage, pick a color, add a note, and Glasp saves it with the document, the page and the date. You can copy every highlight from a PDF in one click and export them to Notion, Obsidian, Markdown, CSV or JSON.
Yes. Highlighting PDFs, taking notes, tagging, exporting and keeping highlights private are free with no credit card. Glasp Pro raises the PDF upload limit and the AI limits, such as PDF chat.
No. Glasp highlights PDFs that open in your browser directly, so a document on your own machine never has to leave it. If you want the PDF in your Glasp library — to read it on another device, or to chat with it — you can upload it, and that is your choice rather than a requirement.
Yes. Glasp can copy a PDF's text as Markdown, XML or plain text, which is the part most PDF readers make painful. Selected passages keep their structure instead of arriving as one run-on line.
Yes. Export to Notion, Obsidian, Roam Research and mem.ai, or download as Markdown, HTML, CSV, plain text or JSON.
Yes. Glasp's PDF chat answers questions about the document you have open and cites the pages it drew from, and it can use the passages you highlighted as extra context. See the Chat with PDF page.
Chrome, Safari, Edge and Firefox have their own extension listings, and Brave and Opera install the Chrome build. The Safari extension also works on iPhone and iPad.
Yes. Highlights are stored in your Glasp account and appear in every browser you sign into, and in the Glasp mobile app.
Yes. Highlights on PDFs you upload to Glasp are private by default, whatever your plan. On PDFs you open on the web, highlights are public by default, and on every plan, including Free, you can make any PDF's highlights private.
More questions? Read the docs or email hi [at] glasp.co.
Add Glasp to your browser and keep what the document actually said. It's free.
Start on your phone
Open a PDF in the Glasp app's Reader and highlight it on your phone — iPhone, iPad and Android.