portcheck.
see what’s actually listening on your local ports.
shows pid, command, user, address. zero deps. linux + macos. faster than netstat, simpler than ss. mit-licensed.
npm i -g @v0idd0/portcheck
no more pretending you remember ss -ltnp anymore.
four jobs. all in your terminal. no api call, no internet round-trip — just a plain tool that does what it says.
all listeners
5432 postgres 1208 postgres
22 sshd 903 root
what’s on a port
uvicorn workers (4)
holding since 14:02
free a stuck port
port 3000 now free
ci-friendly
{"port":3000,"pid":4231,"cmd":"node"}
]
three ways. all painless.
npm
$ npm i -g @v0idd0/portcheck
node 14+ on linux / macos / windows. updates with npm update -g.
github releases
$ curl -L github.com/voidd0/portcheck/releases/latest
single static binary. zero runtime needed. all releases →
git clone
$ git clone github.com/voidd0/portcheck
read the source, send a pr, fork it. mit licence, no cla. repo →
ss -ltnp works on linux. lsof -i works on macos. portcheck works on both, with the same flags, and prints columns you can actually read.
no telemetry. no signup. zero deps — single static binary. mit forever — the source is public and the npm package is yours to fork.
comparing tools? voiddo portcheck vs lsof → · portcheck vs portchecker.io →
power user?
use this daily? tools.voiddo Pro · $9 one-time
supports 66 free tools · Pro license via Paddle · one flat price, no subscription