Annotate PDF Online
Download App, Manage PDF Easily
How to Annotate PDF for Free
While reading PDF books or documents, you may find something important and want to mark it, or you want to add some reading tips beside the text. In this case, you can try LightPDF to comment PDF for free by uploading a PDF file, select the highlight color and mark the content or add the text on a PDF file. After you finish the reading and commenting, hit the save button to save the changes and download the file.
Easy and User-friendly
The online PDF annotator can work without any effort. You don't need to install anything, and when it comes to annotating interface, you can easily figure out how each tool works. What's more, if you want to delete one of the comment or highlight line, you can click to trash it. And you can annotate PDF on Windows, Mac, Android as well as iOS devices.
No Ads & No Virus
The website ensures great user experience, and is aimed to improve users productivity, so we don't add any annoying ads to distract your work. And you can feel save using our site, because our site won't bring any virus to your device or damage your documents. You can also use any virus detector to check it before using our site.