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100% Client-Side RAM
Zentro

Fast, private, and sovereign document tools. Compress, convert, edit, and organize documents directly in your browser without data leaks.

Zero Uploads • Zero Server Storage

Document Tools

  • Compress PDF
  • Merge PDF
  • Split PDF
  • Rotate PDF
  • PDF to Word
  • OCR Searchable PDF

Learning Center

  • How PDF Compression Works
  • Client-Side Security Guide
  • PDF/A Archival Standards
  • All Learning Guides

Privacy & Legal

  • Privacy Policy
  • Terms of Service
  • Security & Sovereignty

© 2026 Zentro. Built with sovereign browser-first architecture.

No document telemetry recorded.

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  2. Features
Core Architecture

Engineered for Sovereignty & Speed

Discover how Zentro redefines document productivity by replacing cloud servers with modern browser computing.

Zero-Upload Sovereignty

Documents process in local browser memory via WebAssembly without hitting external servers.

Instant Execution

No network queue latency or remote conversion servers. Processing begins the moment you click.

Cryptographic Privacy

Password encryption and decryption execute via standardized ciphers entirely on your machine.

Multi-Threaded Workers

Heavy document calculations leverage dedicated Web Worker threads to keep the UI smooth.