Annotate PDF Documents
Add highlights, text notes, and visual markups to your PDF documents instantly.
Choose PDF or drag & drop
Annotation Controls:
Applying metadata overlays...
How to Efficiently Annotate PDF Files
When reviewing documents, the ability to annotate a PDF is invaluable. Our **Annotate PDF** tool provides a fast, free, and secure way to add visual markers and text highlights to your documents.
A Privacy-First Markup Engine
At **PDF MASTER TOOLS**, we prioritize your document's confidentiality. Our engine runs **100% inside your web browser**. Your document never leaves your machine.
Frequently Asked Questions
Will the annotations be permanent?
Yes. Our tool uses a burn-in process to fuse the annotation layers into the PDF structure.
Does this tool work on scanned PDF documents?
Yes absolutely. Our tool overlays a visual layer on top of each page.
Is the service free for business use?
Yes. All tools are 100% free with no sign-ups and no fees.
Does this tool work on mobile devices?
Yes, it is responsive and works on any modern smartphone browser.