How to Annotate a PDF Online — Free, No Account

Reviewing a contract? Marking up a design brief? Annotating a research paper? You can do all of this without Adobe Acrobat, without creating an account, and without uploading anything to a server.

Types of PDF Annotations

• Text highlights: Colour-mark important passages. Standard in academic and legal review.
• Sticky notes / comments: Add pop-up comments at specific points without altering the visible content.
• Text boxes: Add typed text anywhere on the page — useful for form-filling or labeling.
• Drawings / shapes: Circles, arrows, lines, freehand drawing for visual markup.
• Strikethrough: Mark text for deletion during document review.

Annotating with PDFForge

1. Open the Annotate tool
2. Upload your PDF
3. Select an annotation tool from the toolbar
4. Apply annotations — highlights, shapes, text, sticky notes
5. Save and download your annotated PDF

Annotation Best Practices for Document Review

• Use consistent colour coding: Yellow for important points, red for issues, green for approved sections.
• Be specific in comments: "Typo in line 3 — 'their' should be 'there'" is more useful than "fix this."
• Number your comments: Helps in discussions — "See comment 7 about the pricing clause."
• Save before annotating: Keep a clean copy of the original before adding markup.

Frequently Asked Questions

Can the original author see my annotations?

Yes — annotations saved by PDFForge are embedded in the PDF and visible to anyone who opens it. If you want to send an annotated copy for discussion, download after annotating and share that file.

Can I remove annotations added by others?

PDFForge can remove annotation layers. Use the tool to load the annotated PDF and clear all annotations.

Do annotations affect the original content?

No. Annotations are stored as a separate layer above the page content. The underlying text and images are unchanged.