High-Quality Tool to Annotate PDF Files

Your PDF files are secure when using this PDF annotator, as our servers are protected by the latest end-to-end encryptions to ensure complete privacy.

You can undo or delete annotations after adding them as long as you have not downloaded the file yet. If you accidentally download a file with annotation mistakes, simply re-upload it to our online PDF editor to remove them.

You can’t annotate multiple PDFs at once and would need to upload each file separately.

There’s no limit to the number of pages you can annotate; however, we have a 20 MB file size limit for the documents you can upload on our site. So, as long as your file meets this limit, it doesn’t matter how many pages it contains.

To edit or move an existing annotation, you need a tool that can edit and annotate PDFs, meaning a simple annotator won’t be enough. Fortunately, pdf.net has both a PDF editor and an annotation tool that you can use to update your file.

Not all your annotations will be visible on PDF readers, as some applications don’t support the standard markups and highlights on PDF files.

To remove annotations from a PDF, you can use pdf.net’s online tool for annotating documents and editing PDF files. After uploading your file, simply select and delete the annotation you want to remove and then download the updated document.

It’s possible to annotate scanned PDF documents with pdf.net; all you need to do is follow the same steps for annotating regular PDF files.

You can’t annotate encrypted or password-protected PDFs. Instead, you would need to save its contents in a separate file and add your annotations there.

You can use pdf.net on a Mac, Linux, or smartphone to annotate PDFs online. As a cloud-based platform, pdf.net can be accessed on virtually any device or browser with an internet connection.