Annotate PDF Online Free – Highlight, Comment & Draw
Review, study, and collaborate on PDF documents with our comprehensive free annotation tools. Highlight important text, add sticky note comments, draw shapes, underline passages, and mark up pages directly in your browser. Perfect for students, teachers, legal professionals, and anyone who needs to mark up documents collaboratively. No signup, no watermark.
Drop your PDF here or browse
Standard PDF files supported
How to Annotate PDF
- 1
Upload the PDF you want to annotate.
- 2
Select your annotation tool from the toolbar – highlight, comment, draw, or text box.
- 3
Click or drag on the PDF to apply your annotation.
- 4
Add multiple annotations of different types across all pages.
- 5
Save and download the annotated PDF with all markups embedded.
Key Features
Text Highlighting – Select any text and highlight in yellow, green, pink, or blue.
Sticky Note Comments – Add pop-up comment notes anywhere on the page.
Drawing Tools – Freehand drawing, arrows, lines, rectangles, and circles.
Underline & Strikethrough – Mark up text with underline or strikethrough formatting.
Multi-Color Support – Annotate in multiple colors for organized review workflows.
No Watermark – Download your annotated PDF completely clean with no added branding.