Building a browser-native SaaS utility handling 10GB P2P file transfers via WebRTC

I wanted to share the technical execution and launch of quickBridge.app, a browser-to-browser file transfer utility.

Most file-sharing tools rely heavily on centralized cloud infrastructure, which introduces major server costs, storage overhead, and upload/download friction. I wanted to see how far I could push pure WebRTC data channels to bypass the server entirely for massive file payloads.

The Tech Stack:

• WebRTC: Used for direct, encrypted peer-to-peer data channels to ensure maximum throughput.
• HTML5 File API: Handles local file chunking and streaming directly within the browser context without crashing the tab memory.
• Signaling Server: A lightweight signaling layer used strictly for initial room pairing (QR codes/PINs), which disconnects the moment the P2P connection is established.

By keeping data transfers strictly client-side, the utility easily handles individual file limits up to 10 GB with near-zero server infrastructure costs.

I’d love to discuss the architecture, potential WebRTC edge cases across symmetric NATs, or hear any feedback on optimization!