Katana web crawling

Katana is a fast crawler/spider from ProjectDiscovery, aimed at automation pipelines (URLs in → discovered endpoints out). Official docs and flags: repository README and katana -h.

Scope and ethics

Use only on systems you own or are explicitly authorized to test (contract, bug bounty program rules, internal env). Crawl gently: set concurrency, rate limits, and depth to reduce load. Misuse can violate law and terms of service—you are responsible for your actions (tool ships with that warning).

Installation

Go (requires Go 1.25+ per upstream; verify current README if install fails):

CGO_ENABLED=1 go install github.com/projectdiscovery/katana/cmd/katana@latest

Docker: