Skip to content
PDFlys

Annotate PDF

Add notes, comments, drawings, and markup to any PDF — directly in your browser. Perfect for reviewing documents, grading papers, providing feedback, or collaborating on contracts. Your files never leave your device.

Upload your PDF

Drag and drop, or click to browse

100% private — processed locally

Text Annotations

Add text notes, comments, and labels anywhere on your document. Choose font, size, and color.

Freehand Drawing

Draw directly on the PDF with a smooth freehand pen. Adjust color and brush width for precise markup.

Stamps & Shapes

Insert rectangles, circles, arrows, and lines to call out sections or create visual emphasis.

How to Annotate a PDF

  1. 1

    Open PDFlys and upload the PDF you want to annotate.

  2. 2

    Choose an annotation tool from the toolbar — text, freehand pen, highlighter, or shapes.

  3. 3

    Click or draw on the PDF to place your annotation on any page.

  4. 4

    Adjust colors, sizes, opacity, and positions using the property panel.

  5. 5

    Click Download to save the annotated PDF with all markups permanently embedded.

FAQ

Can I annotate a multi-page PDF?▾
Yes. Use the page navigator to switch between pages and annotate each one independently. All annotations across all pages are saved when you download.
Are annotations permanently saved in the PDF?▾
Yes — all annotations (text, drawings, shapes, highlights) are permanently embedded in the downloaded file. They will be visible to anyone who opens the PDF.
Can I undo or delete annotations?▾
Yes. Use Ctrl+Z (or Cmd+Z on Mac) to undo your last action. You can also click any annotation to select it and press Delete to remove it.
Does it work for reviewing and grading documents?▾
Absolutely. PDFlys is great for teachers grading papers, managers reviewing reports, or anyone who needs to add feedback directly on a PDF document.
Can I annotate password-protected PDFs?▾
PDFlys can open PDFs that have a view password (you'll need to enter it). However, PDFs with editing restrictions may have limited annotation support.

Related Tools

Edit PDFSign PDFCrop PDFAdd Text to PDF
← Back to PDFlys