ToolKitSphereAnnotate PDF
Files never leave your browserHighlight, underline, and mark up PDF pages with a real annotation toolbar.
Upload a PDF to annotate
Single file
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Annotate PDF documents with custom text, highlights, shapes, and freehand marks. Mark up pages directly in your browser with real-time page preview.
Features
- Highlight text areas with adjustable opacity and colors
- Add text notes, rectangles, and circles onto any page
- Click-to-place annotation placement on page canvas
- 100% Client-side document privacy
- Multi-page navigation and annotation tracking
- Export annotated PDF in one click
Why use this annotate pdf?
- Ideal for reviewing documents, grading assignments, or giving feedback
- Fast in-browser workflow with no software download
- Keeps internal documents private on your machine
- Free unlimited annotations
Frequently asked questions
What annotation tools are available?
You can add text overlays, translucent color highlights, rectangular boxes, and circular shapes.
Can I remove an annotation before downloading?
Yes, each placed annotation has a delete button on the preview canvas.