Is Online PDF Compression Safe?

Security Analysis ยท Updated for 2025

When dealing with legal contracts, tax returns, or financial records, security is paramount. The primary risk with online tools is data interception during upload or data persistence on remote servers.

The Safest Option: Local Processing

For maximum privacy, use tools that process files in your browser's RAM. Our Squoosh Zip tool compresses files without ever uploading them to the cloud.

Use Native Tool

Verdict on Cloud Tools

If you must use cloud-based compression for very large files, ensure the provider complies with GDPR and ISO 27001 standards.

  • SmallPDF Uses 256-bit TLS encryption. Files deleted after 1 hour.
  • PDF2Go Servers located in Europe. Strict GDPR compliance.