All the tools you need
A complete PDF annotation suite — directly in your browser, no plugins required.
Drawing & Writing
Freehand Pen
Draw anything with a smooth, pressure-sensitive pen tool with adjustable color and stroke width.
Highlighter
Semi-transparent highlighting preserves the text beneath while making it stand out.
Eraser
Remove specific annotations without clearing the entire page.
Sticky Notes
Add draggable, editable text notes that float above the document.
Shapes & Lines
Rectangle
Draw precise rectangles with color and stroke control.
Rounded Rectangle
Rectangles with adjustable corner radius for a softer look.
Circle / Ellipse
Mark sections with circular or oval shapes.
Arrow
Point to specific areas with direction arrows.
Underline
Draw straight horizontal lines under text sections.
Selection & Editing
Select & Move
Click any annotation to select it, then drag to reposition.
Resize
8-directional resize handles for precise sizing.
Rotate
Rotate shapes freely using the rotation handle.
Delete
Remove a selected annotation instantly with the Delete key.
Undo / Redo
60-step undo history per page so mistakes are never permanent.
Viewer & Navigation
Multi-page PDF
Smoothly scroll through any multi-page PDF with an inline page viewer.
Zoom
Zoom from 40% to 300% or fit the page to your viewport width.
Dark Mode
Toggle between light and dark themes — preference saved across sessions.
Keyboard Shortcuts
P H E R G C A U N V for tools, Ctrl+Z/Y for undo/redo, arrow keys for pages.
Mobile & Accessibility
Floating Action Button
On mobile, a FAB button reveals all tools in a collapsible panel.
Full Touch Support
All tools work with touch events on phones and tablets.
Auto-fit Canvas
The canvas automatically fits the viewport width on narrow screens.