Annotate PDF Online Free (Highlight, Draw & Add Notes) - PDF Birds

How to Annotate PDF Files Online

1. Upload PDF: Click the Choose File button or drag and drop your document into the PDF annotation workspace.
2. Markup & Review: Add comments, highlight important sentences, underline text, draw freehand notes, or insert callout shapes.
3. Download Annotated PDF: Click Save & Download to export your reviewed, marked-up PDF document instantly.

Key Features of PDF Birds PDF Annotation Tool

• Versatile Markup Tools: Highlight, underline, strikethrough text, add sticky notes, rectangles, circles, and arrows effortlessly.
• Clean Collaborative Feedback: Perfect for grading assignments, reviewing draft contracts, proofreading manuscripts, and team approvals.
• 100% Free & Unlimited: Markup as many documents as you need without watermarks, daily limits, or software downloads.
• Strict Privacy Protection: Files transfer through encrypted channels and are deleted automatically from our servers after download.

Frequently Asked Questions (FAQs)

Can I add a digital signature to the document after annotating?

Yes, you can easily insert electronic signatures or fill form fields using our Fill & Sign PDF Tool.

What if the marked-up document becomes too heavy to email?

You can optimize and shrink your document file size instantly using our Compress PDF Tool.

Can I black out sensitive information instead of highlighting it?

If you need to permanently sanitize confidential text or private data, use our dedicated Redact PDF Tool.

Can I convert the annotated document into an editable Word draft?

Yes, convert your marked-up file into an editable layout using our PDF to Word Converter.

Explore Related PDF Tools

• Add digital signatures: Fill & Sign PDF
• Black out confidential data: Redact PDF
• Reduce document file size: Compress PDF
• Convert to editable Word: PDF to Word