Bank-Grade In-Browser Security & Absolute Privacy
Unlike traditional PDF portals that upload your confidential contracts and statements to cloud servers, MistPDF runs 100% client-side. Zero bytes ever leave your device.
100% Client-Side WebAssembly
Document parsing, manipulation, AES-256 encryption, and rasterization execute solely in local browser RAM via compiled WebAssembly binaries.
Air-Gapped & Offline Ready
Disconnect your computer from Wi-Fi or Ethernet. MistPDF continues functioning completely offline because zero remote API calls are required.
GDPR Article 25 & HIPAA Safe
Because no Protected Health Information (PHI) or personal data is collected or transmitted, MistPDF inherently conforms to strict global data governance laws.
ISO 27001 Principle Alignment
Engineered with strict zero-trust standards. There is zero risk of data exposure through third-party cloud breaches because we retain no document storage.
Don't Trust Words. Verify with Your Browser Network Inspector
You don't have to take our word for it. You can empirically prove that MistPDF never transmits your files in four simple steps:
- Press F12 (or right click and select Inspect) in Chrome, Edge, Safari, or Firefox.
- Click the Network tab and select the Fetch / XHR filter.
- Drag and drop a PDF file into any MistPDF tool (such as Compress, Merge, or Protect).
- Notice that zero outbound HTTP POST requests appear. All computation happens locally in your device RAM.