Annotate PDF

About Annotate PDF

Highlight text, add sticky notes, draw freehand, and comment on PDFs. Great for reviewing documents, giving feedback, or studying materials.

Annotate PDF features

• Highlight and draw on PDF pages.
• Add review notes and visual comments.
• Export the annotated document.

When to use Annotate PDF

Review drafts, mark study material, and provide feedback on reports or proofs.

How to use Annotate PDF online

1. Step 1. Upload your file using the drag-and-drop area above.
2. Step 2. Adjust any settings, then start processing.
3. Step 3. Download your result instantly — free, with no watermarks.

Check the downloaded result

Annotations are intended for review and study copies. Confirm that comments and marks remain visible in the downloaded PDF viewer you plan to use.

File privacy and processing

This tool processes your file locally in your browser. The source document is not uploaded to PDFHill for processing, although your browser may download the tool libraries needed to perform the task. Read our file safety overview.

Frequently asked questions

Is this tool free?

Yes. PDFHill tools are free to use and PDFHill does not add a watermark to your downloaded file.

Do I need an account?

No sign-up is required for most PDFHill tools.

Will my original file be changed?

No. PDFHill creates a new download. Your original file stays as it was on your device.

Helpful guides

Related PDF tools

Free · No sign-up required · No PDFHill watermark · Help center