Margo — PDF Canvas & Annotation

Draw, annotate and think freely next to any PDF. Full whiteboard canvas for students, tutors and researchers.

Margo — PDF Canvas & Annotation Most PDF tools let you annotate on your document. Margo gives you infinite space next to it. Open any PDF and get a professional split workspace instantly : your document on the right, a full drawing canvas on the left. Draw diagrams, write equations, connect ideas with arrows — all while keeping your PDF in sight. Built for : — Students who think visually while reading their course materials — Online tutors who want to keep a trace of every session — Researchers who annotate papers and build visual arguments What you can do with Margo : ✏️ Draw freely next to your PDF with a full whiteboard canvas (powered by tldraw) 🖊️ Highlight text and annotate directly on the PDF 📐 Insert shapes, arrows, diagrams and charts 📷 Capture any zone of the PDF and paste it into your canvas 💾 Your sessions are saved automatically — resume exactly where you left off 📤 Export your work as a combined PNG (canvas + PDF page side by side) No account. No upload. Your files never leave your device.