Initial release of OpenPDFStudio - A free, open-source PDF annotation editor.
Features:
- PDF viewing with single page and continuous scroll modes
- Annotation tools: highlight, draw, line, arrow, circle, rectangle, polygon, polyline, cloud, text, textbox, callout, comment, stamp
- Arrow annotations with multiple arrowhead styles
- Full annotation editing: select, move, resize, rotate
- Properties panel with appearance customization
- Copy/paste/duplicate annotations
- Undo support
- Keyboard shortcuts
- Context menus
- Preferences dialog
- Export to PDF with annotations
Built with Electron, PDF.js, and pdf-lib.