PDF Annotator
Annotate a PDF with pen, highlighter and text, then export the marked-up file — all client-side.
How to use the PDF Annotator
-
Open your PDF.
-
Draw, highlight or add text on the page.
-
Export the annotated PDF.
How to annotate a PDF
Annotating a PDF lets you add freehand drawings, highlights and notes on top of the original pages — perfect for feedback, corrections or study. This tool renders pages with pdf.js, captures your markup on an overlay, and stamps it back into the file with pdf-lib. Everything stays on your device.
Key features
- Pen, highlighter and text tools
- Choose colors and stroke size
- Annotate any page
- Exports entirely in your browser
Frequently asked questions
Can I highlight and draw freehand?
Yes — use the highlighter for translucent marks and the pen for solid freehand strokes.
Are annotations editable later?
Annotations are stamped onto the page on export. Keep the original file if you want to re-annotate.
Is my PDF uploaded?
No. Annotation happens locally in your browser.