PDF Annotator

How to Annotate a PDF Online

Need to mark up a PDF document with highlights, notes, or drawings? Here is how to do it without installing any software.

Step 1: Upload Your PDF

Drag and drop your PDF file into the upload area or click to select it from your computer. The tool loads your document directly in the browser.

Step 2: Choose Your Annotation Tool

The toolbar gives you several options:

• Highlight tool to mark important text
• Underline tool for key points
• Sticky note tool to add comments
• Drawing tool to sketch or circle areas
• Shape tool to add rectangles, circles, and arrows

Step 3: Apply Your Annotations

Click or drag on the PDF page where you want to add the annotation. You can change the color and thickness of highlights and drawings.

Step 4: Download the Annotated PDF

When you are done, click download to save your marked up PDF. The annotations become part of the PDF file.

Why Annotate PDFs in Your Browser

Desktop PDF editors can cost hundreds of dollars. This tool gives you the same annotation features for free. You can highlight contracts, add notes to research papers, draw on design mockups, or circle errors in reports.

Your document never leaves your computer. Every annotation is processed locally, so sensitive documents stay private.

Common Questions About PDF Annotation

Can I add text boxes to a PDF?

Yes. The sticky note tool lets you type comments that appear as clickable icons on the page. You can also add free floating text anywhere on the document.

Will my annotations be saved in the PDF?

Yes. When you download the PDF, all your highlights, notes, drawings, and shapes are embedded into the file. Anyone who opens the PDF will see them.

Can I change the color of my highlights?

Yes. You can choose from multiple colors for highlights, underlines, and drawings. Pick yellow for important points, red for errors, or green for approved sections.

Do I need to install any software?

No. Everything runs in your browser. No downloads, no plugins, no account needed.