Add Comment Box
Add inline comment boxes on a PDF — small bordered text blocks at chosen coordinates with your note inside.
1. Upload your file
How does the Add Comment Box work?
Add inline comment boxes on a PDF — small pale-yellow bordered rectangles with your note text inside, anchored at coordinates you specify. Useful for marked-up review copies, instructor feedback on student work, or peer-review markup. Each comment is a block in the textarea: the first line is "page,x,y" and the remaining lines are the comment text. Blocks are separated by blank lines. Different from Sticky Note, which renders as an icon-and-bubble; this is a simple boxed inline annotation.
🔒 Security & Privacy
All processing happens on your device. Your files never leave your browser, never touch our servers, and are not stored anywhere. Close the tab and the file is gone.
📱 Use it on any device
Works in any modern browser — Mac, Windows, Linux, iPhone, Android, and tablets. No installation, no app to download. Just open the page and start.
⚡ Quick & easy
Drag, drop, click. Most files process in seconds, not minutes. No watermarks added to your output, no per-day limits, and the tool always shows the result before asking you to download.
🎁 Always free, no signup
Free to use, every time. No account creation, no email required, no “trial” that converts to a paid plan. We make money from ads so you don’t have to pay.