Sandboxing
eBPF lab
Run a real Linux kernel with eBPF in your browser — write, compile, and load BPF programs entirely client-side.
Runs in your browser
Tools & Labs
Small tools and interactive labs for networking, security, and sandboxing. Each tool or lab is its own page.
Networking
tcpdump filter builder
Build a tcpdump capture filter by clicking fields in a visual IPv4 and TCP header.
Runs in your browser