Margo — PDF Canvas & Annotation

About

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.