Annotate PDF Online
Place a clear highlighted review note on all or selected PDF pages while keeping the document in your browser.
A translucent vector note box is added to each selected page locally.
How to use the PDF annotation tool
- STEP 1Choose an unencrypted PDF.
- STEP 2Enter pages, note text, position, and color.
- STEP 3Download the annotated PDF.
About this tool
Add a visible vector highlight box and short review note at a consistent proportional location on selected pages.
The note becomes part of page content and remains visible in standard readers.
This focused tool adds annotations but does not edit pre-existing comment objects.
Frequently asked questions
What kind of annotation is added?
The tool adds a translucent colored rectangle with a short vector text note at the chosen proportional page position.
Can I annotate selected pages?
Yes. Leave the page field blank for all pages or enter comma-separated pages and ranges such as 1,3-5.
Can existing annotations be edited?
No. This tool adds a new visible annotation layer; it does not inspect or modify existing PDF comment objects.