Annotate PDF Online — Free Markup Tool
Highlight, underline, comment, and mark up your PDFs — free in your browser.
Drop your PDF files here
or click to browse files
Max 25MB per file (free) · No signup required
How to Annotate PDF
Upload PDF
Upload the PDF you want to annotate.
Add Annotations
Highlight, comment, draw, and mark up.
Save & Download
Download your annotated PDF.
Features
Highlight
Highlight text in multiple colors.
Comments
Add sticky notes and text comments.
Shapes
Draw rectangles, circles, lines, and arrows.
Freehand
Draw freehand annotations with pen tool.
Add annotations to PDF documents including highlights, underlines, strikethrough, sticky notes, text comments, shapes, and freehand drawing. Perfect for reviewing documents, providing feedback, and collaborative markup. All annotations are saved directly into the PDF.
Frequently Asked Questions
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