Modify files.
Privately, in browser.
WASM Sandbox
Isolated Environment
Local Processing
Client-Side Only
Volatile Memory
No Disk Write
Built so you don’t have to trust us.
No uploads. No file tracking. No metadata collection. Processing happens directly in your browser. Your files stay on your device. We can’t see them. We don’t want to.
Network Silent
No HTTP requests are made during processing. Your file never touches cloud.
Ephemeral State
Files live in your device's volatile memory and vanish instantly when you close the tab.
Transparency by Design.
Modufile operates on a zero-trust, local-first architecture. Explore how our protocols keep your data yours.
How is it 100% private?
We utilize a local-only architecture. Your files never leave your device; all processing happens in-browser via WebAssembly.
Can I use it offline?
Yes. Modufile is a Progressive Web App (PWA). Once loaded, it caches the core engine and functions entirely without an internet connection.
What libraries do you use?
We utilize pdf-lib for PDF manipulation, @imagemagick/magick-wasm for image processing, and mupdf for robust rendering.
Local-Only Loop
Data flows strictly between your device storage and the browser sandbox. No server uploads, no metadata leakage.
What about file size limits?
File size is limited only by your browser's allocated memory. Generally, files up to 1GB are handled smoothly on modern devices.
Is the project open source?
Absolutely. We believe trust is earned through transparency. Our core components are available for audit.