Privacy Policy

Last Updated: February 15, 2026

Welcome to PDFSlick Sync. We value your privacy and are committed to protecting your personal data. This policy explains how we handle data for our application and real-time PDF collaboration platform.

1. Information We Collect & Process

  • Account Data: When you register, we collect your email address and name.
  • Collaboration Data: To enable real-time features, we process and store synchronization data (CRDTs), including cursor positions, active users, and presence information.
  • Annotation & Comment Data: We store the metadata you create, such as text highlights, drawings, sticky notes, and comments. This data is linked to a specific document ID so it can be reloaded when you return.
  • Technical Data: We may collect your IP address and browser type for security monitoring and to maintain WebSocket connections.

2. Document Privacy

We do not store your PDF documents. Our service operates as an annotation layer. When you open a PDF document, the file is processed locally in your browser. Our servers only store the annotations, comments, and collaboration states associated with that file.

  • We do not have access to the underlying content of your PDF files unless it is explicitly included in an annotation or comment.
  • The original PDF remains on your local device or your chosen third-party storage provider.

3. How We Use Your Data

We use your information to:

  • Synchronize annotations and comments between multiple users in real-time.
  • Persist your collaborative work so it is available in future sessions.
  • Communicate technical updates or support responses.

4. Data Storage and Security

We use industry-standard security measures to protect your metadata:

  • Infrastructure: We use Cloudflare Services, and Postgres DB for synchronization and storage.
  • Encryption: All data in transit is encrypted via TLS. Stored annotations are protected using industry-standard encryption at rest.

5. Third-Party Services

We use a limited number of trusted providers to run our service (Cloudflare, Stack Auth, Neon)

6. Your Rights

You have the right to access, export, or delete your account and all associated annotation/comment data at any time through your account settings.

7. Contact Us

If you have questions regarding this policy, please reach out via email at pdfslick@gmail.com.