Katana

A fast crawler built for security recon and URL discovery.

Katana is a fast, scalable web crawling framework from ProjectDiscovery, written in Go, designed for thorough URL discovery via both standard and headless JavaScript-aware crawling. It supports scope control, form filling, passive sources, and custom field extraction with a focus on automation pipelines. It is notable in the security and recon space for its speed and configurable crawling depth.