Show HN: Kuack – Run Kubernetes jobs in visitor browsers
kuack Monday, December 29, 2025
WebAssembly makes it possible to run serious computation in browsers. I wanted to see if we could treat browsers as Kubernetes workers.
Kuack is a Virtual Kubelet provider that schedules Kubernetes workloads to browser tabs. Visitors' browsers connect, report capacity, and become ephemeral workers. It looks like a regular Kubernetes node - same kubectl commands, same OCI images, same workflows. The difference is that pods execute in browsers instead of servers. With multi-platform OCI images, Kubernetes can fall back to regular nodes if no agents are available.
It's designed for short-lived, stateless, CPU-heavy jobs: load testing from real networks, local data preprocessing, edge computing scenarios, machine learning tasks, etc.
Not a replacement for your cluster - just an extra option for workloads that benefit from browser execution.