Euclid PDF Reader annotates, extracts citations, and sends every highlight straight into Euclid Notes — so reading a paper and writing about it happen in the same place.
Annotate, cite, and move on — without breaking your reading flow.
Highlight, underline, and margin-note independently, each with its own color and layer.
Automatically pulls author, year, and DOI from a paper so you never type a citation by hand.
Every highlight can be sent to Euclid Notes with one keystroke, citation already attached.
Search across every paper in your library at once, not just the one you have open.
Read two papers side by side to compare methods, figures, or results directly.
Your whole paper library is stored locally, so it's there even without a connection.
Import a paper and Euclid PDF Reader identifies its metadata automatically.
Highlight key passages and add margin notes without leaving the page.
Highlights land in your notebook already linked to the source and citation.
Export a formatted reference list from everything you've read, anytime.
Euclid PDF Reader is free, open-source, and available on desktop, web, tablet, and mobile.