How to let multiple users comment and annotate the same PDF at the same time?

Let multiple users comment and annotate the same PDF at the same time using PDFSlick Sync

This task can be performed using PDFSlick Sync

Add real-time collaboration to PDF documents in your app

Best product for this task

PDFSli

PDFSlick Sync

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A drop-in PDF viewer that brings real-time cursors, comments, and annotations to your app. Turn your PDFs into active workspaces in minutes.

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What to expect from an ideal product

  1. PDFSlick Sync lets multiple users open, comment, and annotate the same PDF simultaneously, with changes appearing live for every participant without any page refresh.
  2. Real-time cursors show exactly where each collaborator is working inside the document, so teams stop overwriting each other or sending conflicting annotation files back and forth.
  3. Drop it into your existing app in minutes. PDFSlick Sync is built as a drop-in PDF viewer, so you skip months of custom development and get live collaboration working fast.
  4. Every comment, highlight, and annotation syncs instantly across all connected users, turning a static PDF into a shared workspace where decisions happen inside the document itself.
  5. Built for product teams who need to ship PDF collaboration without building infrastructure from scratch. PDFSlick Sync handles the real-time layer so your team focuses on the product.

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