What is Rematrix Gallery?

A Raspberry Pi project that hijacks WiFi captive portals to create anonymous local media sharing networks for art, videos, and music.

How do you build a local media sharing network with captive portals?

Spoof OS connectivity checks (like generate_204) with DNS redirects to a FastAPI server returning 302s, triggering the portal UI for uploads.

Can I run this on my own hardware?

Yes — flash the .img.gz to a Pi Zero 2W or similar, supports Android/iOS/Windows auto-detection out of the box.

📦 Open Source Projects

Hijacking Captive Portals to Build Stranger-Fueled Art Galleries on WiFi

Imagine connecting to cafe WiFi and getting blasted with strangers' trippy art instead of a login nag. One dev did just that, hijacking captive portals with a Raspberry Pi.

theAIcatchup Apr 10, 2026 4 min read

Glitchy Matrix-style UI on a phone screen from Raspberry Pi captive portal media gallery

⚡ Key Takeaways

Hijacks captive portals using simple DNS and HTTP redirects for instant stranger media sharing. 𝕏
Runs on low-power Raspberry Pi with open-source code — no frameworks, pure vanilla frontend. 𝕏
Echoes early internet sharing vibes but predicts corporate co-opting soon. 𝕏

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theAIcatchup

Community-driven. Code-first.

#FastAPI #captive portals #fastapi apps #local media sharing #media sharing #raspberry pi #raspberry pi projects #wifi hacking

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Originally reported by Dev.to

⚡ Key Takeaways

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