You can use pen, highlight, rectangle, text, note-style labels, and image stamps in the current Annotate PDF workflow.
Annotate PDF
Add pen marks, highlights, rectangles, text, notes, and image stamps to PDF pages in your browser.
All processing happens in your browser. Files never leave your device.
Drop a PDF to annotate
Use pen, highlight, rectangle, text, notes, and image stamps directly in your browser.
About this tool
Toolnetix Annotate PDF gives you a practical, browser-based annotation workspace for review and markup workflows without installing desktop software. You can add freehand pen marks, highlight important regions, draw rectangles, place text labels, drop note-style callouts, and stamp images where needed. These controls are useful for document reviews, approval rounds, QA comments, legal markups, and quick internal feedback loops. All edits are processed locally in your browser, so your PDF content stays on your device and is not uploaded to external servers. When you apply annotations, Toolnetix exports a new PDF file with your changes while preserving the original source as a separate copy. After export, you can continue with related tools such as Redact PDF, Watermark PDF, or Sign PDF to complete your document workflow. Try next: Sign PDF • Watermark PDF.
How to use
- Upload a PDF document.
- Choose an annotation tool such as pen, highlight, rectangle, text, note, or image.
- Apply your markups on the preview and adjust color, opacity, size, and position.
- Repeat on any required pages, then review your annotations.
- Apply changes to generate a new PDF file.
- Download the annotated PDF.
Related tools
Try next: Sign PDF • Watermark PDF • Edit PDF Text (Visual Replace).
Frequently asked questions
Yes. You can add annotations across multiple pages before exporting.
Yes. The exported PDF includes the applied annotations as part of the output file.
Yes. Toolnetix processes annotation steps locally on your device.