Annotate PDF
Annotate PDF Online. Add notes and comments to PDF document.
or drop files here
🔒 Files stay private & secure in your browser. No files are uploaded to server.
How to Annotate PDF Online for Free
1
Select your files
Click the Upload button or drag & drop your files into the upload box.
2
Configure options
Adjust specific settings, arrange file order, or make edits in the interactive preview.
3
Save & Download
Click the Annotate PDF button to finish and download your file instantly.
Frequently Asked Questions
Is using Annotate PDF safe and private?
Yes, 100%! All file processing takes place right inside your browser using client-side WebAssembly and JavaScript. Your files are never uploaded to any remote server or stored in the cloud.
Is there any fee or file limit?
No. SemrushAI PDF Tools is completely free to use with unlimited operations. There are no subscriptions, paywalls, or hidden charges.
Can I use this on mobile phones or Mac?
Absolutely! The tool runs smoothly on any modern web browser across Windows, macOS, Linux, Android, and iOS.