Paperpile authenticates securely with your Google Account. Our servers never access your password or store it anywhere.

It also connects to your Google Drive, but cannot access your personal data — only files you upload via Paperpile.

And of course, we won't share your e-mail address with anyone.

Annotate your PDFs and never forget an important idea

Highlight text and add notes right when you read the paper.

New: Paperpile for iOS, Android, Word

Markup your papers in color and style

Markup and annotate research papers

Highlight and underline the important parts of a paper.

Whether you stick with one color or devise a sophisticated color code to organize the information is up to you.

Add sticky notes

Add comments and notes to PDFs

Never forget an important idea.

Add your notes to text, tables, or images.

Create beautiful summaries

Summary of annotations of a PDF

Condense your annotations into a beautiful, printable summary.

Come back to your summary at any time and know exactly what this paper was about without re-reading it.

Always in sync, never locked in

Sync PDF annotations to Google Drive

Your annotations are directly saved to the PDF and synced to Google Drive.

Paperpile uses open standards to make sure you can read and edit your annotations with any other standards compliant program.

All your papers in one place. Nice and tidy.