工夫 · kufū · the art of making things work

Small, sharp tools for developers.

A hub of developer-focused utilities built to solve small, everyday needs.

Available now

Webhook Inspector

Get a unique URL that captures any incoming HTTP request in real-time. Inspect headers, bodies, and query params as they arrive.

IP Checker

See the public IP address your connection is coming from. Plain-text and JSON endpoints make it scriptable from the command line.

Check my IP

Solid Background

Fill the screen with any solid color. A clean backdrop for screenshots, recordings, and color checks.

Open background